JP2013010118A - Method for adjusting circumferential length of annular sheet material and device for adjusting circumferential length of sheet material - Google Patents

Abstract

[PROBLEMS] To adjust all kinds of annular thin plate members constituting a thin plate material laminate to different target peripheral lengths at low cost in the same peripheral length adjusting step without increasing the number of peripheral length adjusting devices. Provided are a method for adjusting the circumference of an annular thin plate material, and a device for adjusting the circumference of a thin plate material.
A method for adjusting the circumferential length of a metal ring 10 uses a pair of rollers 21 that wrap around the metal ring 10 around the engaging portion 22, and the nine engaging portions 22 are provided on the pair of rollers 21. The circumferential difference ΔR between the metal rings 10 arranged along the rotation axis AX of the roller 21 and adjacent to the lamination direction TH in the metal ring laminate 3 with respect to the roller radial direction RD. In the state where the pair of rollers 21 rotate around the rotation axis AX and the nine metal rings 10 circulate around the rotation axis AX, the distance X between the rotation axes is increased, and nine metals are formed. the ring 10, by stretching at the same time the plastic deformation zone to the circumferential length R _n of each target.
[Selection] Figure 1

Description

  The present invention, for example, adjusts the circumferential length of an annular thin plate material that adjusts a plurality of metal annular thin plate materials configured in a continuously variable transmission (CVT) mounted in an automobile or the like to different circumferential lengths. The present invention relates to a method and a thin plate material circumferential length adjusting device for adjusting the circumferential length of an annular thin plate material.

  The CVT belt constructed in the CVT has a plurality of metal thin plate members laminated with a plurality of metal annular thin plate materials each having a slightly different circumferential length laminated in the thickness direction. The laminate is arranged so as to be movable along the circumferential direction of the plate laminate, and a plurality of metal elements are held and bound by two thin laminates. As an example of adjusting the circumference of the metal thin plate material in manufacturing the thin plate material laminate, there is a metal ring circumference correction method disclosed in Patent Document 1. FIG. 23 is a schematic diagram showing a metal ring circumference correction device disclosed in Patent Document 1. As shown in FIG.

Patent Document 1, as shown in FIG. 23, the metal ring stack, the circumference is slightly different plurality of metal rings _{W (W 1, W 2,} W 3, ..., W n) of the metal ring circumference The circumference is adjusted by the correction device 501. The metal ring circumferential length correcting device 501 changes the distance between the shafts of the driving roller 502 and the driven roller 503 and applies tension to the metal ring W wound around the driving roller 502 and the driven roller 503 one by one. When rotating around and adjusting the circumference, the correction roller 504 is displaced to the P side in the metal ring W in a horizontal state. In Patent Document 1, for each of the metal rings W ₁ , W ₂ , W ₃ ,..., W _n , the circumference difference m between the circumference of the metal ring W in the horizontal state and the target circumference is obtained individually. The amount of movement of the correction roller 504 is determined based on the circumference difference m, and the circumference of the metal ring W is adjusted one by one.

JP 2009-66630 A

  However, Patent Document 1 has the following problems. Since Patent Document 1 adjusts the circumference of metal rings W one by one by the metal ring circumference correction device 501, in order to adjust the circumference of all types of metal rings W constituting the metal ring laminate R, The number of metal ring circumference correction devices 501 corresponding to the number of stacked metal rings W must be installed. Therefore, a large installation space for the metal ring circumference correction device 501 is required, and it may be difficult to secure a large installation space only for the circumference adjustment process of the metal ring W, particularly in the CVT manufacturing process. . In addition, if the number of equipment of the metal ring circumference correction device 501 increases, a large equipment cost is required, and the circumference process of the metal ring W is separately required for each circumference of the metal ring W to be adjusted. The total processing time required for adjusting the circumference of all the metal rings W constituting the metal ring laminated body R is long, and there is a problem that the manufacturing cost is expensive.

  The present invention was made to solve the above problems, and in the same circumference adjustment step without increasing the number of facilities of the circumference adjustment device, all kinds of annular thin plate materials constituting the thin plate material laminate, An object of the present invention is to provide a method for adjusting the circumferential length of an annular thin plate material and a thin plate material circumferential length adjusting device that can be adjusted to different target circumferential lengths at low cost.

In order to solve the above-described problems, the circumferential thin plate material circumferential length adjusting method and thin plate circumferential length adjusting device of the present invention have the following configurations.
(1) Having a plurality of thin metal plates formed in an annular shape, each circumferential length of the plurality of thin plates is changed in stages, and the plurality of thin plates are stacked in the stacking direction along the thickness direction. In the method for adjusting the circumferential length of an annular thin plate material for forming an annular thin plate material laminated body that is laminated together, lamination is performed on a predetermined number of engaging portions corresponding to the number of laminated thin plate materials laminated in the thin plate material laminated body. A pair of rollers that wrap around each of a predetermined number of thin plate members are used, and a predetermined number of engaging portions are arranged along the rotation axis direction of the pair of rollers, and the rotation axis direction Are formed with a diameter difference corresponding to a circumferential length difference between the thin plate materials arranged adjacent to each other in the laminating direction in the thin plate material laminate, and a pair of rotations around the rotation axis. The roller is rotating and a predetermined number of thin plates are circulating. The pair of rollers are separated from each other in a direction to increase the distance between the rotation axes of the pair of rollers, and each of the predetermined number of thin plate materials is simultaneously stretched to the plastic deformation region to have a target circumferential length. To do.
(2) In the method for adjusting the circumference of the annular thin plate material described in (1), the thin plate material is crowned in accordance with the shape of the engaging portion.
(3) In the method for adjusting the circumferential length of the annular thin plate member described in (1) or (2), the predetermined number of engaging portions are all formed in a tapered shape with respect to the rotation axis direction. To do.
(4) In the method for adjusting the circumferential length of the annular thin plate material described in any one of (1) to (3), the circumferential length of the thin plate material is not dependent on the arrangement position in the stacking direction before being stretched. It is the same, and the arrangement position of the thin plate material with respect to the stacking direction and the arrangement position of the engagement portion with respect to the rotation axis direction are associated with each other in a one-to-one relationship. It is characterized in that the tension applied to the thin plate material at the engaging portion is uniformly applied to all the predetermined number of thin plate materials.
Note that the one-to-one relationship is a predetermined number of thin plate members, and the thin plate member disposed at the outermost peripheral position of the thin plate member laminate is the engagement member having the largest diameter among the predetermined number of engagement members. Corresponding to the part. On the other hand, among the predetermined number of thin plate members, the thin plate member disposed at the innermost peripheral position of the thin plate member laminate is made to correspond to the engagement portion having the smallest diameter among the predetermined number of engagement portions. That is, it refers to a relationship in which the thin plate members arranged in the thin plate member laminate sequentially correspond from the small-diameter engaging portion to the large engaging portion as the position sequentially changes from the inner peripheral side to the outer peripheral side.
(5) In the method for adjusting the circumferential length of the annular thin plate member described in any one of (1) to (4), the distance between the rotation axes is controlled to extend a predetermined number of thin plate members to the respective target circumferential lengths. It is a feature.
(6) In the method for adjusting the circumferential length of the annular thin plate member described in any one of (1) to (5), the distance between the rotation axes is within all the circumferences with respect to the predetermined number of thin plate members before stretching. The first step of setting the distance through which the pair of rollers can be inserted, and after the first step, the pair of rollers are relatively within the circumference of the predetermined number of thin plate members in a state where the predetermined number of thin plate members are combined into one. The second step of holding the predetermined number of thin plate members in the predetermined number of engaging portions in a state where tension is applied in the elastic deformation region, and after the second step, while rotating the pair of rollers, And a third step of expanding the distance between the rotation axes to reach a target circumference for a predetermined number of thin plate members.
(7) In the method for adjusting the circumferential length of the annular thin plate member described in any one of (1) to (6), the thin plate member is a steel ring, and the thin plate laminate is configured as a continuously variable transmission. It is a metal ring laminated body in which steel rings are laminated as a part of the metal belt.

(8) An annular thin plate material laminated by laminating a plurality of thin plate materials whose circumferential lengths are changed in stages in a laminating direction along the thickness direction. In the thin plate material circumferential length adjusting device for forming a body, a predetermined number of thin plate materials are hung around a predetermined number of engaging portions corresponding to the number of thin plate materials stacked in the thin plate material laminate, and the rotation shaft is rotated. A roller having a pair of rollers configured to rotate around the center and capable of controlling the distance between the rotation axes, a predetermined number of engaging portions disposed along the rotation axis direction, and a roller orthogonal to the rotation axis direction It is characterized by being formed with a diameter difference corresponding to a difference in circumferential length between thin plate materials arranged adjacent to each other in the radial direction in the radial direction.
(9) In the thin plate material circumferential length adjusting device described in (8), the predetermined number of engaging portions is an R shape corresponding to the crowning attached to the thin plate material or the unevenness attached to the thin plate material with respect to the roller radial direction. It is formed in a shape.
(10) In the thin plate material circumferential length adjusting device described in (8) or (9), the predetermined number of engaging portions are all formed in a tapered shape with respect to the rotation axis direction.
(11) In the thin plate material circumference adjusting device described in any one of (8) to (10), the distance between the rotation axes is controlled by a servo motor.
(12) In the thin plate material circumferential length adjusting device described in any one of (8) to (11), the pair of rollers are provided in a cantilevered manner or in both ends with respect to the rotation axis direction and are adjacent to each other. It is characterized by comprising roller support means for supporting the pair of rollers from the radial direction of the roller at positions between the engaging portions.

  The operation and effect of the circumferential thin plate material adjusting method and the thin plate material circumferential length adjusting device of the present invention having the above-described configuration will be described.

In the circumferential length adjusting method of the annular thin plate material of the present invention,
(1) Having a plurality of thin metal plates formed in an annular shape, each circumferential length of the plurality of thin plates is changed in stages, and the plurality of thin plates are stacked in the stacking direction along the thickness direction. In the method for adjusting the circumferential length of an annular thin plate material for forming an annular thin plate material laminated body that is laminated together, lamination is performed on a predetermined number of engaging portions corresponding to the number of laminated thin plate materials laminated in the thin plate material laminated body. A pair of rollers that wrap around each of a predetermined number of thin plate members are used, and a predetermined number of engaging portions are arranged along the rotation axis direction of the pair of rollers, and the rotation axis direction Are formed with a diameter difference corresponding to a circumferential length difference between the thin plate materials arranged adjacent to each other in the laminating direction in the thin plate material laminate, and a pair of rotations around the rotation axis. The roller is rotating and a predetermined number of thin plates are circulating. The pair of rollers are separated from each other in a direction to increase the distance between the rotation axes of the pair of rollers, and each of the predetermined number of thin plate materials is simultaneously stretched to the plastic deformation region to have a target circumferential length. Therefore, the process of adjusting the circumferential length, which stretches the thin sheet material to the target circumferential length without causing springback in the thin sheet material, is summarized regardless of the number of laminated thin sheet materials. Compared to the conventional method of adjusting the circumference, the number of processes for adjusting the circumference is divided into the number of processes for stacking, and the thickness of each thin sheet material is adjusted one by one in each process. Can be reduced. Therefore, the total processing time required to adjust the circumference of all the thin plates laminated with the thin plate laminate can be done in the time to adjust the circumference of the thin plate material for one layer. The manufacturing cost required for adjustment can be greatly reduced.

  Further, the circumferential length adjusting method for the annular thin plate material of the present invention is different from the conventional circumferential length adjusting method for the equipment for adjusting the circumferential length of the thin plate material (peripheral length adjusting device). In addition, it is possible to reduce the space for installing the equipment in the factory. In addition, in the conventional circumferential length adjustment method, when the circumferences of a plurality of types of thin plate materials having different arrangement positions in the stacking direction are to be adjusted with the same equipment, the difference between the arrangement positions in the stacking direction causes a difference between the thin plate materials. Although a setup change operation for providing a circumference difference is required, the setup method for the circumference of the annular thin plate material of the present invention does not have such a setup change operation. Therefore, manufacturing cost can be reduced. Furthermore, since the number of facilities corresponding to the number of stacked layers is not required, the facility cost for the facilities can be greatly reduced.

  Therefore, according to the circumferential length adjusting method of the annular thin plate material of the present invention, in the same circumferential length adjusting step without increasing the number of facilities of the circumferential length adjusting device, all kinds of annular thin plate materials constituting the thin plate material laminate are respectively provided. There is an excellent effect that it can be adjusted to different target circumferences at low cost.

(2) In the method for adjusting the circumference of the annular thin plate material described in (1), the thin plate material is crowned in accordance with the shape of the engaging portion. Therefore, by attaching the crowning to the thin plate material, Laminated thin plate materials arranged adjacent to each other in the thin plate material laminate can be easily held together. In addition, when a thin plate material laminate is formed with a thin plate material with crowning, a separate step of applying crowning to the thin plate material is not required, and the number of manufacturing steps of the thin plate material laminate can be reduced. .

(3) In the method for adjusting the circumferential length of the annular thin plate member described in (1) or (2), the predetermined number of engaging portions are all formed in a tapered shape with respect to the rotation axis direction. Therefore, in the state before stretching, a taper-like thin film having a circumferential length difference between the circumferential length on one side and the circumferential length on the other side with respect to the width direction of the thin plate material perpendicular to the thickness direction and the circumferential direction. As for the plate material, each of the predetermined number of tapered thin plate materials can be stretched at the same time until reaching a target circumferential length.

(4) In the method for adjusting the circumferential length of the annular thin plate material described in any one of (1) to (3), the circumferential length of the thin plate material is not dependent on the arrangement position in the stacking direction before being stretched. It is the same, and the arrangement position of the thin plate material with respect to the stacking direction and the arrangement position of the engagement portion with respect to the rotation axis direction are associated with each other in a one-to-one relationship. It is characterized in that the tension acting on the thin plate material at the engaging portion is evenly applied to all the predetermined number of thin plate materials, so that the manufacturing cost of the thin plate material before wrapping is related to the engagement of the pair of rollers. Compared to the case where a thin plate material having a different circumferential length is used in advance depending on the position of the joint portion, the cost can be reduced. In addition, between the thin plate materials arranged adjacent to each other in the thin plate material laminate, the circumferential difference inevitably caused by the arrangement position in the lamination direction can be similarly attached to each arrangement position of the thin plate material, Each circumferential length of the predetermined number of thin plate members can be changed stepwise in a uniform state. As a result, it is possible to form an annular thin plate material laminate in which a predetermined number of thin plate materials are stacked and stacked in a more closely attached state in the stacking direction.

(5) In the method for adjusting the circumferential length of the annular thin plate member described in any one of (1) to (4), the distance between the rotation axes is controlled to extend a predetermined number of thin plate members to the respective target circumferential lengths. Therefore, for a given number of thin plates, the amount of stretch to stretch the thin plate before stretching to the target circumference, and the amount of displacement to displace the distance between the rotating shafts until the target circumference is reached. Therefore, if the amount of displacement of the distance between the rotation axes is accurately controlled, the thin plate material can be increased to a target perimeter according to each arrangement position in the stacking direction for all the predetermined number of thin plate materials. Can be stretched to accuracy. In addition, when the circumference adjustment is performed under the mass production system, it is possible to easily control the quality of whether the thin plate material is stretched to the target circumference.

(6) In the method for adjusting the circumferential length of the annular thin plate member described in any one of (1) to (5), the distance between the rotation axes is within all the circumferences with respect to the predetermined number of thin plate members before stretching. The first step of setting the distance through which the pair of rollers can be inserted, and after the first step, the pair of rollers are relatively within the circumference of the predetermined number of thin plate members in a state where the predetermined number of thin plate members are combined into one. The second step of holding the predetermined number of thin plate members in the predetermined number of engaging portions in a state where tension is applied in the elastic deformation region, and after the second step, while rotating the pair of rollers, And a third step of expanding the distance between the rotating shafts to a target perimeter for a predetermined number of thin plate materials, so that a lot of all the predetermined number of thin plate materials are combined into one lot When adjusting the circumference of a series of lots under a mass production system, for example, While the second process or the third process is being performed, the work to combine all the predetermined number of thin plate materials for the next lot into one, and the position where the next lot can perform the second process It is possible to adjust the circumference with high productivity, such as being able to carry out the first step during the movement.

(7) In the method for adjusting the circumferential length of the annular thin plate member described in any one of (1) to (6), the thin plate member is a steel ring, and the thin plate laminate is configured as a continuously variable transmission. As a part of the metal belt, the steel ring is a metal ring laminated body in which steel rings are laminated. The conventional peripheral length adjustment method in which the manufacturing cost required for adjusting the peripheral length required to form the laminate is divided into the number of steps for the stack, and the peripheral length of each thin plate material is adjusted in each step. Compared to the above, since it can be greatly reduced, the continuously variable transmission can be manufactured at low cost.

Moreover, in the thin plate material circumference adjusting device of the present invention,
(8) An annular thin plate material laminated by laminating a plurality of thin plate materials whose circumferential lengths are changed in stages in a laminating direction along the thickness direction. In the thin plate material circumferential length adjusting device for forming a body, a predetermined number of thin plate materials are hung around a predetermined number of engaging portions corresponding to the number of thin plate materials stacked in the thin plate material laminate, and the rotation shaft is rotated. A roller having a pair of rollers configured to rotate around the center and capable of controlling the distance between the rotation axes, a predetermined number of engaging portions disposed along the rotation axis direction, and a roller orthogonal to the rotation axis direction Since it is formed with a diameter difference corresponding to the circumferential length difference between the thin plate materials arranged adjacent to each other in the thin plate material laminate in the radial direction, the circumference for extending the thin plate material to the target circumferential length The length adjustment process depends on the number of laminated thin plate members in the thin plate laminate. Compared to the conventional peripheral length adjustment device, the number of peripheral length adjustment steps is divided into the number of stacks, and the thickness of each thin sheet material is adjusted one by one in each step. Can be greatly reduced. Therefore, the total processing time required to adjust the circumference of all the thin plates laminated with the thin plate laminate can be done in the time to adjust the circumference of the thin plate material for one layer. The manufacturing cost required for adjustment can be greatly reduced.

  Further, unlike the conventional circumference adjusting device, the thin plate material circumference adjusting device of the present invention does not need to install the number of facilities corresponding to the number of stacked layers, and only needs to secure a space for one unit, Space to be installed in the factory can be reduced. Further, in the conventional peripheral length adjusting device, when adjusting the peripheral lengths of a plurality of types of thin plate materials having different arrangement positions in the stacking direction with the same device, due to the difference in the arrangement position in the stacking direction, between the thin plate materials. Although a setup change operation for providing a difference in circumference is required, there is no such setup change operation in the circumferential thin plate material circumferential length adjusting device of the present invention. Therefore, the manufacturing cost for adjusting the circumference of the thin plate material can be reduced. Furthermore, since the peripheral length adjusting device for the annular thin plate material of the present invention does not need to install the number of facilities corresponding to the number of stacked layers, the equipment cost required for installing can be greatly reduced.

  Therefore, according to the thin plate material circumferential length adjusting device of the present invention, in the same circumferential length adjusting step without increasing the number of peripheral length adjusting devices, all kinds of annular thin plate materials constituting the thin plate laminated body are different targets. This has an excellent effect that it can be adjusted at a low cost.

(9) In the thin plate material circumferential length adjusting device described in (8), the predetermined number of engaging portions is an R shape corresponding to the crowning attached to the thin plate material or the unevenness attached to the thin plate material with respect to the roller radial direction. Since it is characterized by being formed in a shape, by attaching crowning to the thin plate material, the laminated thin plate materials arranged adjacent to each other in the thin plate material laminate can be easily held together. In addition, for example, when a thin plate material laminate is formed using a thin plate material with crowning, there is no need for a separate step of applying crowning to the thin plate material, and the number of manufacturing steps of the thin plate laminate is reduced. Can do.

(10) In the thin plate material circumferential length adjusting device described in (8) or (9), the predetermined number of engaging portions are all formed in a tapered shape with respect to the rotation axis direction. In the state before stretching, with respect to the thin plate material width direction orthogonal to the thickness direction and the circumferential direction, the tapered thin plate material having a circumferential length difference between the circumferential length on one side and the circumferential length on the other side In addition, each of the predetermined number of tapered thin plate members can be simultaneously stretched to have a target circumferential length.

(11) In the thin plate material circumferential length adjusting device described in any one of (8) to (10), the distance between the rotation axes is controlled by a servo motor, so the distance between the rotation axes is changed. In this case, the displacement amount of the distance and the stop position of the pair of rollers can be detected with high accuracy. Therefore, the amount of displacement of the distance between the rotating shafts can be obtained with high accuracy, so that the thin plate material can be stretched with high accuracy to the target perimeter according to each arrangement position in the stacking direction for all the predetermined number of thin plate materials. it can.

(12) In the thin plate material circumferential length adjusting device described in any one of (8) to (11), the pair of rollers are provided in a cantilevered manner or in both ends with respect to the rotation axis direction and are adjacent to each other. Since the roller support means for supporting the pair of rollers from the radial direction of the roller is provided at a position between the engaging portions, the pair of rollers rotate around the rotation axis, and a predetermined number of rollers are rotated. When the pair of rollers are separated from each other in the direction in which the distance between the rotation axes of the pair of rollers is increased in a state where the thin plate material is circulating, the bending moment applied to the rotation axis of the roller is reduced by the roller support means, The swing of the rotating shaft (the deflection of the roller in the roller radial direction) can be suppressed to a small level. As a result, the tension acting on the thin plate material at the engaging portion can be applied more uniformly to the predetermined number of thin plate materials. The perimeter can be

It is explanatory drawing which looked at the circumference adjustment apparatus which concerns on Embodiment 1 from the front. FIG. 2 is a plan view of the circumferential length adjusting device as seen from the AA arrow in FIG. 1. It is a front view which shows the roller which concerns on Embodiment 1. FIG. FIG. 4 is an enlarged view of a Y part in FIG. 3. It is a front view which shows the roller which concerns on the modification 1. FIG. It is a front view which shows the roller which concerns on the modification 2. 2 is a perspective view showing a metal ring according to Embodiment 1. FIG. It is process drawing which shows the flow of the manufacturing process of a metal ring. It is a schematic diagram which shows the mode before the circumference adjustment of nine metal rings hung around a pair of roller. It is a schematic diagram which shows the mode after circumference adjustment of nine metal rings. It is a perspective view which shows the metal ring of 9 layers by which circumference was adjusted. It is a perspective view which shows a part of CVT belt. It is a front view which shows the circumference adjustment conveyance jig holding the metal ring before circumference adjustment. FIG. 14 is a plan view of FIG. 13. FIG. 14 is a side view of FIG. 13. It is a front view which shows the heat processing fixture which hold | maintained the metal ring after circumference adjustment. FIG. 17 is a plan view of FIG. 16. FIG. 17 is a side view of FIG. 16. 6 is a front view showing a roller according to Embodiment 2. FIG. 6 is a perspective view showing a metal ring according to Embodiment 2. FIG. It is a figure explaining a mode that the circumference of the metal ring shown in FIG. 19 is adjusted. It is a perspective view which shows the metal ring of 9 layers by which circumference was adjusted. It is a schematic diagram which shows the metal ring circumference correction | amendment apparatus disclosed by patent document 1. FIG.

Embodiment 1
DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 12 is a perspective view showing a part of the CVT belt. In the present embodiment, the thin plate material of the present invention is a steel ring, and the thin plate material laminate of the present invention is a CVT belt 1 in a continuously variable transmission (CVT) mounted in an automobile or the like. The case where the metal ring laminate 3 is configured will be described.

  First, an outline of the CVT belt 1 will be briefly described. As shown in FIG. 12, the CVT belt 1 includes two metal ring laminated bodies 3 and a plurality (for example, 430 pieces) of metal elements 2. The metal ring laminated body 3 has nine metal rings 10 (thin plate materials) made of maraging steel formed in an annular shape in this embodiment, and each circumferential length of the nine metal rings 10 is stepwise. It is a ring-shaped laminate in which nine metal rings 10 are laminated in nine layers in a stacking direction TH along the thickness direction TH. The CVT belt 1 includes 430 metal elements 2 sandwiched between two metal ring laminates 3 so as to be movable along the circumferential direction of the metal ring laminate 3, and two metal ring laminates. The body 3 holds and binds 430 metal elements 2.

  FIG. 7 shows a metal ring according to this embodiment. As shown in FIG. 7, in the present embodiment, one metal ring 10 has a width D (vertical direction in FIG. 7) of 10 mm, a thickness of 0.185 mm, and a circumferential state before being stretched at both ends in the width direction. It is a thin plate-like ring having a length of 670 mm. In forming the metal ring laminate 3, the metal rings 10 having the same circumferential length are used for all nine layers regardless of the arrangement position in the lamination direction TH. The metal ring 10 is in a state where the solution treatment has already been performed twice by a well-known technique, and after changing the circumference of all nine layers in the circumference adjustment step by the circumference adjustment method of the metal ring according to the present embodiment, Thereafter, aging treatment and nitriding treatment are performed in the process.

  Next, in the metal ring laminated body 3, the thin plate material circumference adjusting device of the present invention is used to change each circumference of the nine metal rings 10 stepwise. FIG. 1 is an explanatory view of the circumference adjusting device according to the present embodiment as viewed from the front. FIG. 2 is a plan view of the circumferential length adjusting device viewed from the AA arrow in FIG. FIG. 3 is a front view showing the roller according to this embodiment, and FIG. 4 shows an enlarged view of a Y portion in FIG.

  The thin plate material circumference adjusting device 20 will be described with reference to FIGS. 1 to 4. As described above, the thin plate material circumferential length adjusting device 20 is a metal ring 10 made of maraging steel formed in an annular shape, and the thickness of nine metal rings 10 stretched by changing the circumferential length in stages. In order to form an annular thin plate laminated body that is laminated in the laminating direction TH along the direction TH, it is a device that gives a circumferential length difference to nine metal rings 10.

  As shown in FIGS. 1 and 2, the thin plate member circumferential length adjusting device 20 includes nine engaging portions 22 corresponding to the number of metal rings 10 to be laminated by the metal ring laminate 3 (9 layers in this embodiment). In addition, nine metal rings 10 are wound around and rotated about the rotation axis AX, and a pair of rollers 21 configured to control the distance X between the rotation axes is provided. The thin plate material circumferential length adjusting device 20 includes a moving roller unit 20A including a first roller 21A configured to be movable in the width direction WD (left and right direction in FIGS. 1 and 2) of the pair of rollers 21, and It consists of a fixed roller portion 20B including a second roller 21B that is fixed and cannot move in the width direction WD.

  The specifications of the first roller 21A and the second roller 21B are substantially the same. The pair of rollers 21 includes a shaft portion 23 having the rotation axis AX as an axis, and nine engaging portions 22 formed integrally with the shaft portion 23. As will be described in detail later, the pair of rollers 21 has a shape of the shaft portion 23 so that the bending of the pair of rollers 21 can be further suppressed with respect to the tension applied when the circumference of the metal ring 10 is extended and adjusted. It is manufactured with sufficient rigidity considering the material, hardness, etc. Specifically, in the present embodiment, the pair of rollers 21 is made of carbon steel in which the shaft portion 23 is formed with a diameter of Φ30 mm and carburizing and quenching is performed to increase the hardness. In each of the pair of rollers 21, nine engaging portions 22 are arranged along the direction of the rotation axis AX. The nine engaging portions 22 have nine engaging surfaces 22a that are contact surfaces of the wound metal rings 10 with the metal ring laminate 3 with respect to the roller radial direction RD perpendicular to the rotation axis AX direction. Each of the metal rings 10 and 10 arranged adjacent to each other is formed with a diameter difference corresponding to a circumferential length difference.

  Nine metal rings 10 are wound around nine engaging portions 22 on each of the pair of rollers 21, and the metal ring 10i of the ninth layer is just at a small tension far from the upper yield point on the ninth engaging portion 22I. The first engaging portion 22A to the eighth engaging portion 22H are wound loosely from the ninth layer of the metal ring 10i when they are in the tightly wound state. The metal ring 10 of the eye is formed so that it can be moored and held. That is, each engagement portion 22 is formed in a shape recessed in the roller radial direction RD diameter, and can hold the wound metal ring 10 at the side portion. When the metal ring 10i in the ninth layer is hung around the ninth engagement portion 22I with just a small tension far from the upper yield point, it is hung in the most loose state. The metal ring 10a can be anchored and held by the first engaging portion 22A. Similarly, the second-layer metal ring 10b is the second engagement portion 22B, the third-layer metal ring 10c is the third engagement portion 22C, and the fourth-layer metal ring 10d is the fourth engagement portion. In the portion 22D, the fifth-layer metal ring 10e is the fifth engagement portion 22E, the sixth-layer metal ring 10f is the sixth engagement portion 22F, and the seventh-layer metal ring 10g is the seventh engagement. At the turning portion 22G, the eighth-layer metal ring 10h can be moored and held by the eighth engaging portion 22H.

  In the first engaging portion 22A to the ninth engaging portion 22I, each engaging surface 22a is formed in an R shape corresponding to the crowning attached to the metal ring 10 in the roller radial direction RD as shown in FIG. Has been. The engagement surface 22a is a curvature surface having a radius R in which the center of the curvature radius is placed on the inner side in the roller radial direction RD diameter. Further, in the pair of rollers 21, the fourth engaging portion 22D and the fifth engaging portion 22E are separated, and a part of the shaft portion 23 is provided between the fourth engaging portion 22D and the fifth engaging portion 22E. An intermediate shaft portion 24 is provided.

  In the present embodiment, the thin plate material circumferential length adjusting device 20 assists the pair of rollers 20 from the roller radial direction RD at positions between the adjacent fourth engaging portions 22D and the fifth engaging portions 22E. A roller support unit 30 (roller support means) is provided. The roller support unit 30 is provided on each of the first roller 21A and the second roller 21B. The nine metal rings 10 are wound around the nine engaging portions 22 of the pair of rollers 21, and each of the engaging portions 22 includes nine metal rings. When the tension corresponding to the stress of the yield point is applied to the ring 10, the ring 10 is disposed at a position where the pair of rollers 21 can be prevented from being bent by the tension. As shown in FIGS. 1 and 2, the roller support unit 30 includes a rolling part 31 that can rotate around an axis parallel to the rotation axis AX of the pair of rollers 20, and the rolling part 31 on the axis. And a holding portion 32 for holding the. The rolling portion 31 is disposed at a position in contact with the outer periphery of the intermediate shaft portion 24 of the first roller 21A (second roller 21B), and can freely follow the first roller 21A (second roller 21B). ing.

  Next, the moving side roller portion 20A will be described with reference to FIGS. A servo motor 41A is connected to the first roller 21A on one end side (lower side in FIG. 1) in the rotation axis AX direction of the first roller 21A, and the first roller 21A held by a bearing (not shown) It can be rotated at high speed by direct drive. The servo motor 41A is electrically connected to a CNC (Computerized Numerically Controlled) control unit (not shown), and is rotationally driven by numerical control by the CNC control unit. In addition to the servo motor 41A, the CNC control unit performs numerical control of the rotation speed, the rotation amount, and the like together with a servo motor 41B and a servo motor 41C described later.

  The servo motor 41A is fixed to the roller mounting base 45. The roller mounting base 45 is mounted on the bed 46 and is disposed so as to be movable relative to the bed 46 along the linear guide 44. A ball screw 47 that passes through the roller mounting base 45 is connected to a servo motor 41C. The servo motor 41C is electrically connected to a CNC control unit (not shown) and is rotationally driven by numerical control. When the ball screw 47 is rotated by the rotation of the servo motor 41C, the roller mounting base 45 freely moves in the width direction WD (left and right direction in FIGS. 1 and 2). In order to detect the movement amount / stop position of the roller mounting base 45 with high accuracy, a rotary encoder and a linear scale may be used in combination with the servo motor 41C.

  The first roller 21A is provided with both ends supported in the direction of the rotation axis AX. Specifically, a tail stock 42A supported by the linear guide 44 is provided on the other end side (the upper side in FIG. 1) of the first roller 21A in the rotation axis AX direction. The other end portion of the shaft portion 23 of the first roller 21A is supported by a bearing 43 inside the tail stock 42A.

  In the moving roller portion 20A, when the servo motor 41C is rotationally driven, the power is transmitted to the roller mounting base 45 via the ball screw 47, and together with the roller mounting base 45, the servo motor 41A, the first roller 21A, and the roller support The unit 30 and the tail stock 42A are integrated and can move in the width direction WD while being supported by the two upper and lower linear guides 44.

  Next, the fixed roller portion 20B will be described with reference to FIGS. A servo motor 41B is connected to the first roller 21B at one end side in the rotation axis AX direction of the first roller 21B so that the first roller 21B held by a bearing (not shown) can be rotated at high speed by a direct drive. It has become. The servo motor 41B is electrically connected to a CNC control unit (not shown) and is driven to rotate in synchronization with the servo motor 41A by numerical control by the CNC control unit.

  The first roller 21B is provided with both ends supported in the direction of the rotation axis AX. Specifically, a tail stock 42B is provided on the other end side in the rotation axis AX direction of the first roller 21B, and the other end portion of the shaft portion 23 of the first roller 21B is supported by a bearing 43 inside the tail stock 42B. Is supported.

  In the thin plate material circumferential length adjusting device 20, when the distance X between the rotation axes of the rotation axis AX of the first roller 21A and the rotation axis AX of the first roller 21B is changed, the second roller 21B is changed with respect to the width direction WD. The first roller 21A moves in the width direction WD by the rotational drive of the servo motor 41C while the rotation axis AX is fixed. That is, when the first roller 21A is separated from the second roller 21B and the distance X between the rotation axes is increased, the servo motor 41C is driven to rotate in the forward rotation direction, and the first roller 21A is rotated close to the second roller 21B. When shortening the inter-axis distance X, the servo motor 41C is rotationally driven in the reverse rotation direction.

  Next, the rotation axis proximity process (first process), the metal ring holding process (second process), and the metal ring circumference adjustment process (third process) by the metal ring circumference adjustment method according to the present embodiment. In addition, a series of metal ring manufacturing steps including steps before and after these steps will be described with reference to FIGS. FIG. 8 is a process diagram showing a flow of a metal ring manufacturing process.

  As shown in FIG. 8, among the manufacturing processes of the metal ring, through the metal ring carrying-in process P1, the inter-rotating shaft proximity process P2, the metal ring holding process P3, and the metal ring circumferential length adjusting process P4 are performed. The metal ring carrying-in process P1 is a process until the nine metal rings 10 are brought together and the nine metal rings 10 are conveyed to the pair of rollers 21 of the thin plate material circumferential length adjusting device 20 in this state.

  FIG. 13: is a front view which shows the circumference adjustment conveyance jig holding the metal ring before circumference adjustment, The top view is shown in FIG. 14, and a side view is shown in FIG. A circumferential length adjusting and conveying jig 60 as shown in FIGS. 13 to 15 is used to group the nine metal rings 10 together. The circumferential length adjustment conveyance jig 60 is a jig in which the first conveyance jig 60A and the second conveyance jig 60B are a pair, and the shapes thereof are substantially the same. The circumferential length adjusting and conveying jig 60 includes nine guide members 61 corresponding to the number (9 layers) of metal rings 10 to be laminated in the metal ring laminated body 3 in both the first conveying jig 60A and the second conveying jig 60B. Consists of. Each of the guide members 61 abuts both ends of the metal ring 10 in the width direction (vertical direction in FIG. 7) and holds a part of the metal ring 10 fitted and held along the circumferential direction. It has a holding part 62A and a ring holding part 62B.

  In the metal ring carrying-in process P1, first, as shown in FIGS. 13 to 15, the metal ring 10 is elastically deformed into a track shape, and the straight portion of the metal ring 10 is fitted into the ring holding portion 62A of the first conveying jig 60A. Include. Further, the second transport jig 60B is arranged in a direction opposite to the first transport jig 60A, and the other straight portion of the metal ring 10 is fitted into the ring holding portion 62B of the second transport jig 60B. Include. This is performed for the nine metal rings 10, and the nine metal rings 10 are grouped together by the circumferential length adjusting and conveying jig 60. From the work site, a pair of the thin plate material circumference adjusting device 20 is made by, for example, carrying means automated by using a multi-joint robot, for example, the nine metal rings 10 grouped together by the circumference adjusting conveyance jig 60. Transport to the position of the roller 21.

  Next, a method for adjusting the circumference of the metal ring according to the present embodiment will be described. As described above, the method for adjusting the circumference of the metal ring according to the present embodiment includes the inter-rotating shaft proximity process P2, the metal ring holding process P3, and the metal ring circumference adjustment process P4. P4 is also performed by the thin plate material circumference adjusting device 20.

In the inter-rotating shaft approaching process P2, the distance X between the rotating shafts of the rotating shaft AX of the first roller 21A and the rotating shaft AX of the second roller 21B (see FIG. 2) is increased with respect to the nine metal rings 10 before being stretched. The distance is set such that the pair of rollers 21 (first roller 21A, second roller 21B) can be inserted into the entire circumference. Specifically, since all of the nine metal rings 10 before being stretched have a circumference of 670 mm, the ninth layer is located in the outermost peripheral layer (the uppermost layer in FIG. 12) of the metal ring laminate 3. The metal ring 10 which becomes the metal ring 10i of the eye is set to the rotation axis distance X ₀ (X ₀ <0) that can be wound around the ninth engaging portion 22I having the maximum diameter among the pair of rollers 21. .

  Next, the nine metal rings 10 are arranged in the nine engaging portions 22 by associating the arrangement positions of the metal rings 10 with respect to the stacking direction TH and the arrangement positions of the engaging portions 22 with respect to the rotation axis AX in a one-to-one relationship. To hold each. That is, in the metal ring holding step P3, the pair of rollers 21 is relatively inserted into the circumference of the nine metal rings 10 in a state where the nine metal rings 10 are combined into one after the rotation axis proximity step P2. The nine metal rings 10 are held by the nine engaging portions 22 in a state where tension is applied in the elastic deformation region.

  Specifically, as shown in FIG. 12, among the nine metal rings 10, the first-layer metal ring 10 a located in the innermost peripheral layer (lowermost layer in FIG. 12) of the metal ring stack 3 is: Among the nine engaging portions 22, the first engaging portion 22A having the smallest diameter is made to correspond. Then, as the metal ring 10 to be arranged becomes an outer peripheral position in order from the position of the second layer to the position of the ninth layer, the diameter increases from the second engaging portion 22B to the ninth engaging portion 22I. The metal ring 10 and the engaging part 22 are made to correspond in order of increasing. That is, the metal ring 10b of the second layer is made to correspond to the second engaging portion 22B having a diameter next to the first engaging portion 22A. Similarly, the metal ring 10c of the third layer is made to correspond to the third engaging portion 22C having the second largest diameter after the second engaging portion 22B. Similarly, the metal ring 10d of the fourth layer is made to correspond to the fourth engaging portion 22D having the second largest diameter after the third engaging portion 22C. Similarly, the metal ring 10e of the fifth layer is made to correspond to the fifth engaging portion 22E having a diameter next to the fourth engaging portion 22D. Similarly, the metal ring 10f of the sixth layer is made to correspond to the sixth engaging portion 22F having a diameter next to the fifth engaging portion 22E. Similarly, the metal ring 10g of the seventh layer is made to correspond to the seventh engaging portion 22G having a diameter next to the sixth engaging portion 22F. Similarly, the metal ring 10h of the eighth layer is made to correspond to the eighth engaging portion 22H whose diameter is next to the seventh engaging portion 22G. Of the nine metal rings 10, the ninth-layer metal ring 10 i located in the outermost peripheral layer (the uppermost layer in FIG. 12) of the metal ring laminate 3 has a diameter of the nine engaging portions 22. Corresponding to the largest ninth engaging portion 22I.

  After the inter-rotating shaft approaching step P2, the conveying means such as the articulated robot described above so that the corner portions of the nine metal rings 10 gathered together are positioned at the engaging portions 22 of the pair of rollers 21, The nine metal rings 10 gathered together by the circumferential length adjusting and conveying jig 60 are relatively inserted into the pair of rollers 21. At this time, as described above, as the positional relationship between the nine metal rings 10 and the pair of rollers 21, the arrangement position of the metal ring 10 in the stacking direction TH and the engaging portion in the rotation axis AX direction are as described above. The nine metal rings 10 that are grouped together are arranged in the thin plate material circumferential length adjusting device 20 so as to correspond to the arrangement position of 22 in a one-to-one relationship.

  The circumference of the metal ring 10 in the state before stretching is 670 mm for all of the first to ninth layers, but the metal rings 10 and 10 arranged adjacent to each other in the metal ring laminate 3 The circumference difference is ΔR (R <0). In adjusting the circumference of the nine metal rings 10 wound around the pair of rollers 21 while rotating the pair of rollers 21, the nine metal rings 10 are elastically deformed in advance to a state where the slack is eliminated. It is necessary to stretch in the area. As the amount of elastic deformation of the metal ring 10 at this time, the metal ring 10a of the first layer that is wound around the first engaging portion 22A having the smallest diameter is in the most loosened state. Stretch to the point where it disappears. FIG. 9 is a schematic view showing a state before the circumference adjustment of the metal ring hung around the pair of rollers.

That is, the servo motor 41C is rotationally driven in the forward rotation direction, and the first roller 21A (moving side roller portion 20A) is further separated from the second roller 21B (fixed portion roller portion 20B). As a result, as shown in FIG. 9, the rotation axis distance X ₁ (X ₀ <X) where the first-layer metal ring 10a is not loosened from the rotation axis distance X ₀ set in the rotation axis proximity step P2. _The distance X between the rotation axes is increased to ₁ ). The rotation axis distance X ₁ is obtained by adding 8 × ΔR, which is a circumferential length difference between the first-layer metal ring 10 and the ninth-layer metal ring 10, to the rotation-axis distance X ₀ (X ₀ +8). × ΔR). Thus, in the metal ring holding step P <b> 3, after nine metal rings 10 are hung around the nine engaging portions 22, the metal ring 10 is applied to the pair of rollers 21 in a state where tension is applied to the hung metal ring 10. Retained. Thereafter, the thin plate material circumferential length adjusting device 20 is removed from the circumferential length adjusting and conveying jig 60 from the nine metal rings 10 and retracted. The circumference adjustment conveyance jig 60 is returned to the work site where the nine metal rings 10 are brought together by the circumference adjustment conveyance jig 60 in the metal ring carrying-in process P1, or in the vicinity of the thin plate material circumference adjustment device 20. It is left as it is.

Next, a metal ring circumferential length adjusting process P4 is performed. In the metal ring circumferential length adjusting method according to the present embodiment, a pair of rollers 21 (first roller 21A, second roller 21B) rotates around a rotation axis AX, and nine metal rings 10 circulate. Then, the first roller 21A and the second roller 21B are separated from each other in the direction in which the distance X between the rotation axes of the pair of rollers 21 is increased, and each of the nine metal rings 10 is simultaneously stretched to the plastic deformation region, and each target to the circumferential length _{R n.} That is, in the metal ring circumference adjusting step P4, after the metal ring holding step P3, the distance X between the rotation axes is set to the target circumference R _{n for} each of the nine metal rings 10 while rotating the pair of rollers 21. (First layer target circumference R ₁ , second layer target circumference R ₂ , third layer target circumference R ₃ , fourth layer target circumference R ₄ , fifth layer target circumference R ₅ , sixth layer target (Peripheral length R ₆ , seventh layer target peripheral length R ₇ , eighth layer target peripheral length R ₈ , ninth layer target peripheral length R ₉ ).

  Specifically, in the thin plate material circumference adjusting device 20, the servo motor 41A and the servo motor 41B are driven to rotate, and the first roller 21A and the second roller 21B are rotated at a rotation speed of 1800 rpm in the present embodiment. The nine metal rings 10 are caused to circulate by the engaging portions 22 of the pair of rollers 21. At this time, the operator confirms that the rotational acceleration of the servo motor 41A and the servo motor 41B is almost zero by a CNC control unit (not shown), so that the first roller 21A and the second roller 21B It is determined whether it is stable at 1800 rpm, and this determination time is set as a reference time. FIG. 10 is a schematic view showing a state after adjusting the circumference of these nine metal rings 10.

6 sec. During this time, while rotating the first roller 21A and the second roller 21B at a constant speed of 1800 rpm, the moving side roller unit 20A is moved by the rotational drive of the servo motor 41C, and as shown in FIG. Control is performed to increase the inter-axis distance X from the rotation axis distance X ₁ before plastic deformation to the rotation axis distance X ₂ (X ₁ <X ₂ ) after plastic deformation, and the nine metal rings 10 are set to each target. stretching up to the circumferential length _{R n.} At this time, nine moving portions 22 (first engaging portion 22A, second engaging portion 22B, third engaging portion 22C, fourth, The tension T acting on the engaging part 22D, the fifth engaging part 22E, the sixth engaging part 22F, the seventh engaging part 22G, the eighth engaging part 22H, and the ninth engaging part 22I) is applied to nine metals. Apply evenly to all rings 10. In this state, the rotation center distance X ₁ dilates to the rotation center distance X _2, tension T is until 1500N in the present embodiment, stretching at a time together nine metal ring 10 to the plastic deformation zone to circumferential length R _n of each target Te.

  The reason why the tension T applied to the nine metal rings 10 is 1500 N is that, in the metal ring 10 having a width of 10 mm and a thickness of 0.185 mm, the stress at the upper yield point where the strain is from the elastic deformation region to the plastic deformation region is 1800 MPa. Therefore, a tension T of 1500 N is required to apply this stress of 1800 MPa to each of the nine metal rings 10.

  Further, a shaft portion 23 having a diameter of 30 mm and nine engaging portions 22 having a diameter larger than that of the shaft portion 23 (first engaging portion 22A, second engaging portion 22B, third engaging portion 22C, and fourth engaging portion). A pair of rollers 21 (first roller) formed by a portion 22D, a fifth engaging portion 22E, a sixth engaging portion 22F, a seventh engaging portion 22G, an eighth engaging portion 22H, and a ninth engaging portion 22I) The reason why the 21A and the second roller 21B) are rotated at a very high speed of 1800 rpm is as follows. That is, when the first roller 21A and the second roller 21B are rotated at a high speed, the above-described tension T is locally applied to the nine metal rings 10 wound around the engaging portions 22 of the pair of rollers 21. This is because the metal ring 10 is stretched more uniformly in the circumferential direction.

  That is, the tension T of 1500 N is stretched by being applied to a straight portion between the engaging portion 22 of the first roller 21A and the engaging portion 22 of the second roller 21B among the nine metal rings 10. On the other hand, of the nine metal rings 10, the frictional force applied to the engaging portion 22 acts on the portion of the nine metal rings 10 that is wound around the engaging portion 22, and the tension T of 1500 N is applied on the portion that is applied. Thus, crowning is performed in the width D direction of the metal ring 10. Therefore, by extending the nine metal rings 10 at a high speed, the metal ring 10 is uniformly stretched and crowned.

6 sec after starting stretching. Thus, the nine metal rings 10 are deformed into a plastic deformation region with little or no spring back (for example, about 0.2% of the stretch amount), and the engagement of the engagement portion 22 as shown in FIG. Following the shape of the surface 22a, crowning with a radius of curvature R is applied. Further, as the circumference of the nine metal rings 10 stretched by the circumference adjustment, the circumference of the first-layer metal ring 10a is a first greater than the circumference 670 mm at the time of carrying into the thin plate circumference adjustment device 20. a layer target circumferential length _{R 1.} The circumference of the second layer metal ring 10b is a second layer target circumference R ₂ (R ₁ + ΔR) that is larger than the first layer target circumference R ₁ by ΔR. Similarly, the circumference of the third layer metal ring 10c is a third layer target circumference R ₃ (R ₂ + ΔR) which is larger than the second layer target circumference R ₂ by ΔR. Similarly, the circumference of the fourth layer metal ring 10d is a fourth layer target circumference R ₄ (R ₃ + ΔR) that is larger than the third layer target circumference R ₃ by ΔR. Similarly, the circumference of the fifth layer metal ring 10e is a fifth layer target circumference R ₅ (R ₄ + ΔR) that is larger than the fourth layer target circumference R ₄ by ΔR. Similarly, the circumference of the sixth layer metal ring 10f is a sixth layer target circumference R ₆ (R ₅ + ΔR) that is larger than the fifth layer target circumference R ₅ by ΔR. Similarly, the circumference of the seventh layer metal ring 10g is a seventh layer target circumference R ₇ (R ₆ + ΔR) that is larger than the sixth layer target circumference R ₆ by ΔR. Similarly, the circumference of the eighth layer metal ring 10h is an eighth layer target circumference R ₈ (R ₇ + ΔR) that is larger than the seventh layer target circumference R ₇ by ΔR. Similarly, the circumference of the ninth layer metal ring 10i is a ninth layer target circumference R ₉ (R ₈ + ΔR) that is larger than the eighth layer target circumference R ₈ by ΔR. FIG. 11 is a perspective view of a nine-layer metal ring whose circumference has been adjusted.

Thus, when the metal ring circumferential length adjusting step P4 is performed, in the state where the nine metal rings 10 are released from the holding by the pair of rollers 21, the nine metal rings 10 each have a target of each target as shown in FIG. Perimeter R _n (first layer target circumference R ₁ , second layer target circumference R ₂ , third layer target circumference R ₃ , fourth layer target circumference R ₄ , fifth layer target circumference R ₅ , The sixth layer target circumference R ₆ , the seventh layer target circumference R ₇ , the eighth layer target circumference R ₈ , and the ninth layer target circumference R ₉ ) are adjusted in circumference.

  Next, after completion of the metal ring circumference adjusting step P4, a metal ring carrying out step P5 is performed. In the metal ring carry-out process P5, the nine metal rings 10 are brought together in the same manner as the metal ring carry-in process P1 using the circumference adjusting conveyance jig 60, and carried to the work site of the jig change process P6 in the next process. It is a process. Next, a jig changing step P6 is performed. The jig changing process P6 uses the heat treatment fixing jig 80 in place of the circumferential length adjusting and conveying jig 60 in order to carry the nine metal rings 10 together into the heat treatment furnace in which the aging treatment process of the next process is performed. Thus, the nine metal rings 10 are gathered together. FIG. 16 is a front view showing the heat treatment fixing jig holding the metal ring after the circumference adjustment, and FIG. 17 is a plan view and FIG. 18 is a side view.

  A heat treatment fixture 80 as shown in FIGS. 16 to 18 is used to transport the nine metal rings 10 together into the heat treatment furnace. The heat treatment fixing jig 80 is a jig in which the first fixing jig 80A and the second fixing jig 80B are a pair and the shape is substantially the same as the circumference adjusting and conveying jig 60. The heat treatment fixture 80 includes nine guide members 81 corresponding to the number of metal rings 10 to be laminated (9 layers) in the metal ring laminate 3 in both the first fixture 80A and the second fixture 80B. . Each of the guide members 81 is in contact with one metal ring 10 at both ends in the width direction (vertical direction in FIG. 7), and holds a part of the metal ring 10 fitted and held along the circumferential direction. It has a holding part 82A and a ring holding part 82B.

  In the jig changing step P6, the first transfer jig 60A and the second transfer jig 60B are removed from the nine metal rings 10 held by the circumference adjusting transfer jig 60, as shown in FIGS. Then, the metal ring 10 is elastically deformed again into a track shape, and the straight portion of the metal ring 10 is fitted into the ring holding portion 82A of the first fixing jig 80A. Further, the second fixing jig 80B is arranged in the direction facing the first fixing jig 80A, and the other straight portion of the metal ring 10 is fitted to the ring holding portion 82B of the second fixing jig 80B. Include. This is performed for the nine metal rings 10, and the nine metal rings 10 are brought together by the heat treatment fixing jig 80.

  From the work site of the jig changing process P6, the nine metal rings 10 gathered together by the heat treatment fixing jig 80 are transported to the position of the heat treatment furnace by, for example, a transport means automated using an articulated robot. An aging treatment step is performed, followed by a nitriding treatment step. The nine nitrided metal rings 10 (first layer metal ring 10a, second layer metal ring 10b, third layer metal ring 10c, fourth layer metal ring 10d, and fifth layer metal ring 10e, sixth-layer metal ring 10f, seventh-layer metal ring 10g, eighth-layer metal ring 10h, and ninth-layer metal ring 10i) are stacked in the thickness direction TH. Thus, an annular thin plate laminate 3 is formed.

  The operation and effect of the metal ring circumference adjusting method and the thin plate material circumference adjusting device according to this embodiment having the above-described configuration will be described.

In the method for adjusting the circumference of the metal ring according to this embodiment,
(1) It has nine metal rings 10 made of maraging steel formed in an annular shape, and each of the nine metal rings 10 is changed stepwise to change the thickness of the nine metal rings 10 in the thickness direction. In the method for adjusting the circumferential length of the metal ring 10 for forming the annular metal ring laminated body 3 laminated in the lamination direction TH along the direction, the number of metal rings 10 laminated in the metal ring laminated body 3 corresponds to 9 layers. A pair of rollers 21 that wrap around each of the nine metal rings 10 to be stacked around the nine engaging portions 22 that are stacked, and the pair of rollers 21 (first roller 21A, second roller 21B) have nine The engaging portion 22 is disposed along the rotation axis AX direction of the roller 21 and is stacked in the stacking direction TH in the metal ring stacked body 3 with respect to the roller radial direction RD orthogonal to the rotation axis AX direction. Each of the metal rings 10 and 10 arranged adjacent to each other is formed with a difference in diameter corresponding to the circumferential difference ΔR, the pair of rollers 21 rotates around the rotation axis AX, and nine metal rings 10 are formed. In a state where the roller 21 is rotating, the first roller 21A and the second roller 21B are separated from each other in a direction to increase the distance X between the rotation axes of the pair of rollers 21, and each of the nine metal rings 10 is moved to the plastic deformation region. Since the metal ring 10 is stretched at the same time to have a target circumference R _n , the metal ring 10 is made to have a target circumference R with no or little springback. peripheral length adjusting step of stretching to _n, can be integrated into one step together regardless of the number of stacked metal rings 10 in the metal ring laminate 3, the number of steps of the circumferential length adjustment, the number of steps of the multilayer component Only, as compared with the conventional peripheral length adjusting method the thin plate was adjusted one by one circumferential length in each step can be greatly reduced. Therefore, the total processing time required to adjust the circumference of all the metal rings 10 to be laminated by the metal ring laminate 3 can be achieved by adjusting the circumference of the metal ring 10 for one layer. The manufacturing cost required to adjust the circumference of 10 can be greatly reduced.

  Moreover, the circumference adjustment method of the metal ring which concerns on this embodiment differs from the conventional circumference adjustment method about the installation (circumference adjustment apparatus 20) which adjusts the circumference of the metal ring 10, and is the number of lamination | stacking (9 layers). ) It is not necessary to install the number of facilities corresponding to the minute, and the space for installing the facilities in the factory can be reduced to a space-saving. In addition, in the conventional circumferential length adjustment method, when the circumferences of a plurality of types of thin plate materials having different arrangement positions in the stacking direction are to be adjusted with the same equipment, the difference between the arrangement positions in the stacking direction causes a difference between the thin plate materials. Although a setup change operation for providing a circumference difference is required, the metal ring circumference adjustment method according to the present embodiment does not have such a setup change operation. Therefore, the manufacturing cost for adjusting the circumference of the metal ring 10 can be reduced. Furthermore, since the number of facilities corresponding to the number of stacked layers is not required, the facility cost for the facilities can be greatly reduced.

Therefore, according to the circumference adjustment method of the metal ring which concerns on this embodiment, in the same circumference adjustment process, without increasing the number of facilities of a circumference adjustment apparatus, all kinds of metal rings 10 which comprise the metal ring laminated body 3 are used. , Different target circumferences R _n (first layer target circumference R ₁ , second layer target circumference R ₂ , third layer target circumference R ₃ , fourth layer target circumference R ₄ , fifth layer target (Peripheral length R ₅ , sixth layer target peripheral length R ₆ , seventh layer target peripheral length R ₇ , eighth layer target peripheral length R ₈ , ninth layer target peripheral length R ₉ ) can be adjusted at low cost. There is an excellent effect of being able to.

(2) In the method for adjusting the circumference of the metal ring described in (1), the metal ring 10 is crowned in accordance with the shape of the engagement surface 22a of the engagement portion 22, so that the metal ring 10 By attaching crowning to the metal ring laminate 3, the metal rings 10 and 10 in a laminated state arranged adjacent to each other in the metal ring laminate 3 can be easily held together. Further, when the metal ring laminate 3 is formed by the metal ring 10 provided with the crowning, the process of attaching the crowning to the metal ring 10 is not required and the number of manufacturing steps of the metal ring laminate 3 is reduced. can do.

(4) In the method for adjusting the circumference of the metal ring of the annular thin plate material described in (1) or (2), the circumference of the metal ring 10 is not dependent on the arrangement position in the stacking direction TH in the state before stretching. 9 (corresponding to 670 mm in the present embodiment), the arrangement position of the metal ring 10 in the stacking direction TH and the arrangement position of the engaging portion 22 in the rotation axis AX direction in a one-to-one relationship. It is characterized in that the nine metal rings 10 are held by the nine engaging portions 22 and the tension T acting on the metal ring 10 by the engaging portions 22 is equally applied to all nine metal rings 10. The manufacturing cost of the metal ring 10 before being rotated can be reduced as compared with the case where a metal ring having a different circumferential length is used in advance depending on the position where the metal ring 10 is wound around the engagement portion 22 of the pair of rollers 21. Further, the circumferential difference ΔR inevitably caused by the arrangement position in the lamination direction TH between the metal rings 10 and 10 arranged adjacent to each other in the metal ring laminate 3 is the same for each arrangement position of the metal ring 10. The circumferences of the nine metal rings 10 can be changed stepwise in a uniform state. As a result, it is possible to form the annular metal ring laminated body 3 in which the nine metal rings 10 are laminated and laminated in the lamination direction TH in a more closely contacted state.

(5) In the method for adjusting the circumference of the metal ring according to any one of (1) to (4), the distance X between the rotation axes is controlled so that the nine metal rings 10 are each set to a target circumference R _n. since wherein stretching up against nine metal ring 10, and the amount of extension stretching the metal ring 10 of the stretching before until the circumferential length R _n target, between the rotating shaft to a circumferential length R _n of each target Since the displacement amount for displacing the distance X is equivalent, if the displacement amount of the distance X between the rotation axes is accurately controlled, the target corresponding to each arrangement position in the stacking direction TH with respect to all nine metal rings 10 is achieved. circumferential length of up to R _n, it is possible to stretch the metal ring 10 with high precision. Further, when the circumference adjustment is performed under the mass production system, it is possible to easily perform quality control as to whether the metal ring 10 is extended to each target circumference R _n .

(6) In the metal ring circumferential length adjusting method according to any one of (1) to (5), the distance X between the rotation axes is within all the circumferences of the nine metal rings 10 before being stretched. Nine metal rings 10 are combined into one after the rotation axis proximity process P2 and the rotation axis proximity process P2 for setting the distance through which the pair of rollers 21 (first roller 21A, second roller 21B) can be inserted. In this state, the first roller 21A and the second roller 21B are relatively inserted into the circumference of the nine metal rings 10, and the nine metal rings 10 are tensioned in the elastic deformation region. After the metal ring holding step P3 and the metal ring holding step P3 respectively held by the portions 22, the distance X between the rotation axes is set to each target circumferential length R _n with respect to the nine metal rings 10 while rotating the pair of rollers 21. Expand until Since the metal ring circumference adjustment step P4 is characterized in that, as a lot that combines all nine metal rings 10 into one, when adjusting the circumference of a plurality of consecutive lots under mass production system, For example, while the previous lot is carrying out the metal ring holding step P3 or the metal ring circumference adjustment step P4, the operation of bringing all nine metal rings 10 for the next lot into one is an inter-rotating shaft proximity step. It can be implemented at P2. Alternatively, while the next lot moves to the position of the thin plate material circumferential length adjusting device 20 capable of performing the metal ring holding step P3, the circumferential length adjustment with high productivity is performed, such as the proximity step P2 between the rotating shafts can be performed. Can do.

(7) In the metal ring circumference adjusting method described in any one of (1) to (6), the metal ring 10 is a ring made of maraging steel, and the metal ring laminate 3 is a continuously variable transmission. Since it is a metal ring laminated body 3 in which metal rings 10 are laminated as a part of the CVT belt 1 configured in the machine, it is overlapped according to the number of laminated metal ring laminated bodies 3 (9 layers). the metal ring 10 to align, manufacturing cost when adjusting the circumferential length R _n required for forming a metal ring stack 3 is divided into the number of steps of the multilayer component, one by one the sheet material at each step circumference Compared to the conventional circumferential length adjustment method in which the length has been adjusted, since it can be greatly reduced, the continuously variable transmission can be manufactured at a low cost.

Moreover, in the thin plate material circumference adjusting device 20 according to the present embodiment,
(8) An annular metal ring stack in which nine metal rings 10 whose circumferential lengths are changed stepwise are stacked in the stacking direction TH along the thickness direction. In the thin plate material circumferential length adjusting device 20 for forming the body 3, nine metal rings 10 are provided in nine engaging portions 22 corresponding to the number of metal rings 10 to be laminated in the metal ring laminated body 3 (9 layers). And a pair of rollers 21 (first roller 21A, second roller 21B) configured to be able to control the distance X between the rotation axes while rotating around the rotation axis AX, and nine engaging portions 22 is arranged along the rotation axis AX direction, and the circumference of the metal rings 10, 10 arranged adjacent to each other in the metal ring laminate 3 with respect to the roller radial direction RD orthogonal to the rotation axis AX direction. Pair with length difference ΔR Since, characterized in that it is formed by the diameter difference that, steps peripheral length adjusting stretching the metal ring 10 to the circumferential length R _n goals, the number of laminated metal rings 10 in the metal ring stack 3 (9 layers) Regardless of the conventional peripheral length adjustment device, the number of peripheral length adjustment steps can be divided into the number of stacking steps, and the peripheral length is adjusted one by one in each step. Can be greatly reduced. Therefore, the total processing time required to adjust the circumference of all the metal rings 10 to be laminated by the metal ring laminate 3 can be achieved by adjusting the circumference of the metal ring 10 for one layer. The manufacturing cost required to adjust the circumference of 10 can be greatly reduced.

  Further, unlike the conventional circumferential length adjusting device, the thin plate material circumferential length adjusting device 20 according to the present embodiment does not need to install the number of facilities corresponding to the number of stacked layers (9 layers), and is a space for one unit. As a result, it is possible to reduce the space required for installation in the factory. Further, in the conventional peripheral length adjusting device, when adjusting the peripheral lengths of a plurality of types of thin plate materials having different arrangement positions in the stacking direction with the same device, due to the difference in the arrangement position in the stacking direction, between the thin plate materials. Although the setup change work for providing the circumference difference is required, the thin plate material circumference adjustment device 20 according to the present embodiment does not have such setup change work. Therefore, the manufacturing cost for adjusting the circumference of the metal ring 10 can be reduced. Furthermore, since it is not necessary to install the number of facilities corresponding to the number of layers, the thin plate material circumference adjusting device 20 according to the present embodiment can greatly reduce the equipment cost for installing.

Therefore, according to the thin plate material circumferential length adjusting device 20 of the present embodiment, in the same circumferential length adjusting step without increasing the number of facilities of the circumferential length adjusting device, all kinds of metal rings 10 constituting the metal ring laminated body 3 are the circumferential length R _n of different target respectively, can be adjusted at a low cost, it exhibits the excellent effect that.

(9) In the thin plate material circumferential length adjusting device 20 described in (8), the nine engaging portions 22 are formed in an R shape corresponding to the crowning attached to the metal ring 10 in the roller radial direction RD. Therefore, by providing crowning to the metal ring 10, the metal rings 10 and 10 in the stacked state arranged adjacent to each other in the metal ring stacked body 3 can be easily held together. Further, for example, when the metal ring laminate 3 is formed by the metal ring 10 that is crowned with the radius of curvature R, a process of attaching the crowning to the metal ring 10 is not required, and the metal ring laminate 3 is manufactured. The number of processes can be reduced.

(11) In the thin plate material circumference adjusting device 20 described in any one of (8) to (10), the distance X between the rotation axes is controlled by a servo motor 41C. When the distance X is changed, the displacement amount of the distance and the stop position of the first roller 21A (moving side roller portion 20A) of the pair of rollers 21 can be detected with high accuracy. Therefore, by the amount of displacement of the rotational axis distance X is obtained accurately, with respect to nine metal rings 10 all, until the circumferential length R _n target corresponding to each position in the stacking direction TH, high metal ring 10 Can be stretched to accuracy.

(12) In the thin plate material circumferential length adjusting device 20 described in any one of (8) to (11), the pair of rollers 21 (the first roller 21A and the second roller 21B) are arranged in the direction of the rotation axis AX. The first roller 21A and the second roller 21B are supported from both ends of the roller radial direction RD by the intermediate shaft portion 24 provided between both ends and between the adjacent fourth engaging portion 22D and the fifth engaging portion 22E. Since the roller support unit 30 is provided, the first roller 21 </ b> A and the second roller 21 are rotated with the pair of rollers 21 rotating around the rotation axis AX and the nine metal rings 10 rotating around. When the first roller 21A and the second roller 21B are separated from each other in such a direction as to increase the distance X between the rotation axes with 21B, the roller support unit 30 causes the shaft portions 23 of the first roller 21A and the second roller 21B to move. The applied bending moment on the rolling axis AX with a smaller deflection of the rotation axis AX (first roller 21A toward the roller radially RD, deflection of the shaft portion 23 of the second roller 21B) can be the suppressed small. As a result, the tension T acting on the metal ring 10 by the engaging portion 22 can be more uniformly applied to the nine metal rings 10, and the metal rings 10 are stretched in the same manner to all the nine metal rings 10. Te, it can be circumferential length R _n of each target.

[Embodiment 2]
Hereinafter, the metal ring circumference adjusting method and the thin plate material circumference adjusting device according to Embodiment 2 will be described with reference to FIGS. 19 to 22.
In the first embodiment, D = width 10 mm, thickness 0.185 mm, and the metal ring 10 having a circumference of 670 mm before being stretched at both ends in the width direction is the object of circumference adjustment.
On the other hand, in Embodiment 2, the width (in the vertical direction in FIG. 19) and the thickness are constant, and the diameter of the outer peripheral side of one end in the width direction D is L1 (0 <L1) as the circumferential length before stretching. The metal ring 110 formed with the outer diameter of the other end in the width direction D being L2 (L1 <L2) and the plate surface being inclined at an angle θ is the object of circumference adjustment.
That is, the second embodiment is different from the first embodiment in the shape of the metal ring 110 and the shape of the pair of rollers 121, but other parts such as the peripheral length adjusting method and the structure of the thin plate member peripheral length adjusting device. Is the same as in the first embodiment.
Therefore, the description will focus on the parts different from the first embodiment, and the description of the others will be simplified or omitted.

  First, the metal ring 110 will be described with reference to FIG. FIG. 19 is a perspective view of a metal ring according to this embodiment. As described above, the metal ring 110 has a constant width D (vertical direction in FIG. 19) and a thickness, and the outer peripheral diameter at one end in the width D direction is L1 and the width before being stretched. The outer diameter of the other end in the D direction is L2, and the plate surface is inclined at a taper angle θ. In the present embodiment, L2−L1 = about 0.3 mm.

  Next, the pair of rollers 121 will be described with reference to FIG. FIG. 20 shows a front view of the roller according to this embodiment. As in the first embodiment, as shown in FIG. 19, nine engaging portions 122 are arranged along the rotation axis AX direction, and a metal ring with respect to the roller radial direction RD orthogonal to the rotation axis AX direction. It is formed with a diameter difference corresponding to the circumferential difference ΔR between the metal rings 110 and 110 arranged adjacent to each other in the laminate 3 (see FIG. 12). In this embodiment, nine engaging portions 122 (first engaging portion 122A, second engaging portion 122B, third engaging portion 122C, fourth engaging portion 122D, fifth engaging portion 122E, and sixth engaging portion. Each of the engaging surfaces 122a of the rotating portion 122F, the seventh engaging portion 122G, the eighth engaging portion 122H, and the ninth engaging portion 122I) has a taper angle θ of the metal ring 110 with respect to the rotation axis AX direction. It is formed in a corresponding tapered shape.

FIG. 21 is an explanatory diagram showing a state in which the circumference of the metal ring shown in FIG. 19 is adjusted. As in the first embodiment, the metal ring circumferential length adjusting method according to the present embodiment is configured such that a pair of rollers 121 (first roller 121A, second roller 121B) rotate around the rotation axis AX, and nine metal rings 110 are rotated. Are rotating, the first roller 121A and the second roller 121B are separated from each other in a direction to increase the distance X between the rotation axes of the pair of rollers 121, and each of the nine metal rings 110 is set to each target. stretching simultaneously until the circumferential length R _n. That is, the metal ring circumference adjusting step P4 of the first embodiment is performed. In the metal ring circumference adjustment step P4, after the metal ring holding step P3, while rotating the pair of rollers 121, the distance X between the rotation axes is set to the target circumference R _n (the first circumference) with respect to the nine metal rings 110, respectively. one layer target circumferential length _{R 1,} the second layer target circumferential length _{R 2,} the third layer target circumferential length _{R 3,} fourth layer target circumferential length _{R 4,} the fifth layer target circumferential length _{R 5,} sixth layer target circumferential length R ₆ , the seventh layer target circumference R ₇ , the eighth layer target circumference R ₈ , and the ninth layer target circumference R ₉ ).

  Although not shown in FIGS. 20 and 21, as in the first embodiment, in the present embodiment, the nine engaging portions 122 of the pair of rollers 121 are tapered at a taper angle θ. The rotating surface 122a can be formed in a shape in which an R shape corresponding to the crowning attached to the metal ring 110 is added to the roller radial direction RD. That is, the engaging surface 122a can be formed in a tapered shape having a radius of curvature R corresponding to crowning and a taper angle θ (see FIG. 4). FIG. 22 is a perspective view of a nine-layer metal ring whose circumference has been adjusted.

Thus, when the metal ring circumferential length adjusting step P4 is performed, the nine metal rings 110 (the first layer metal ring 110a and the second layer metal layer 110) are released in a state where the nine metal rings 110 are released from being held by the pair of rollers 121. Metal ring 110b, 3rd layer metal ring 110c, 4th layer metal ring 110d, 5th layer metal ring 110e, 6th layer metal ring 110f, 7th layer metal ring 110g, 8th layer metal ring As shown in FIG. 22, each of the target circumferential lengths R _n (first layer target circumferential length R ₁ , second layer target circumferential length R ₂ , third layer target) Perimeter R ₃ , fourth layer target circumference R ₄ , fifth layer target circumference R ₅ , sixth layer target circumference R ₆ , seventh layer target circumference R ₇ , eighth layer target circumference R ₈ , the circumferential length adjusted ring ninth layer target circumferential length R ₉₎

  The operation and effect of the metal ring circumference adjusting method and the thin plate material circumference adjusting device according to this embodiment having the above-described configuration will be described.

In the method for adjusting the circumference of the metal ring according to this embodiment,
(1) It has nine metal rings 110 made of maraging steel formed in an annular shape, and the circumference of each of the nine metal rings 110 is changed stepwise to change the nine metal rings 110 into the thickness direction. In the method for adjusting the circumferential length of the metal ring 110 for forming the annular metal ring laminate 3 that is laminated in the lamination direction TH along the axis, the number of metal rings 110 laminated by the metal ring laminate 3 is equivalent to nine. A pair of rollers 121 that wrap around each of the nine metal rings 110 to be stacked around the nine engaging portions 122 that perform rotation, and the pair of one roller 21 (first roller 121A, second roller 121B) includes 9 The two engaging portions 122 are disposed along the direction of the rotation axis AX of the roller 121, and the metal ribs RD are arranged in the roller radial direction RD perpendicular to the direction of the rotation axis AX. A pair of rollers 121 centered about the rotation axis AX, and formed with a diameter difference corresponding to the circumferential difference ΔR between the metal rings 110 and 110 arranged adjacent to each other in the stacking direction TH in the stacked body 3. In a state in which the nine metal rings 110 are rotating, the first roller 121A and the second roller 121B are separated from each other in the direction in which the distance X between the rotation axes of the pair of rollers 121 is increased. the ring 110, respectively, so characterized by the circumferential length R _n of each target by stretching at the same time the plastic deformation zone, spring back does not occur in the metal ring 110, or almost no no circumferential length in a stable state, step peripheral length adjusting stretching the metal ring 110 to the circumferential length R _n goals, together regardless of the number of laminated metal rings 110 in the metal rings laminated body 3 1 step Aggregation can, the number of steps of the peripheral length adjustment is divided into the number of steps of the multilayer component, the thin plate as compared to the conventional peripheral length adjusting method which has been adjusted by one circumferential length in each step can be greatly reduced. Therefore, the total processing time required to adjust the circumference of all the metal rings 110 laminated by the metal ring laminate 3 can be achieved by adjusting the circumference of the metal ring 110 for one layer. The manufacturing cost required for adjusting the circumference of 110 can be greatly reduced.

  Moreover, the circumference adjustment method of the metal ring which concerns on this embodiment differs from the conventional circumference adjustment method about the installation (thin board | plate material circumference adjustment apparatus 120) which adjusts the circumference of the metal ring 110, and the number of lamination | stacking ( It is not necessary to install the number of facilities corresponding to (9 layers), and the space for installing the facilities in the factory can be reduced to space saving. In addition, in the conventional circumferential length adjustment method, when the circumferences of a plurality of types of thin plate materials having different arrangement positions in the stacking direction are to be adjusted with the same equipment, the difference between the arrangement positions in the stacking direction causes a difference between the thin plate materials. Although a setup change operation for providing a circumference difference is required, the metal ring circumference adjustment method according to the present embodiment does not have such a setup change operation. Therefore, the manufacturing cost for adjusting the circumference of the metal ring 110 can be reduced. Furthermore, since the number of facilities corresponding to the number of stacked layers is not required, the facility cost for the facilities can be greatly reduced.

Therefore, according to the circumference adjustment method of the metal ring which concerns on this embodiment, in the same circumference adjustment process, without increasing the number of facilities of a circumference adjustment apparatus, all kinds of metal rings 10 which comprise the metal ring laminated body 3 are used. , Different target circumferences R _n (first layer target circumference R ₁ , second layer target circumference R ₂ , third layer target circumference R ₃ , fourth layer target circumference R ₄ , fifth layer target (Peripheral length R ₅ , sixth layer target peripheral length R ₆ , seventh layer target peripheral length R ₇ , eighth layer target peripheral length R ₈ , ninth layer target peripheral length R ₉ ) can be adjusted at low cost. There is an excellent effect of being able to.

(3) In the method for adjusting the circumference of the metal ring described in (1) or (2), all of the engaging surfaces 122a of the nine engaging portions 122 are tapered with respect to the direction of the rotation axis AX. In the state before stretching, the circumferential length on one side with respect to the width D direction (vertical direction in FIG. 19) of the metal ring 110 perpendicular to the thickness direction TH and the circumferential direction, For the tapered metal ring 110 having a circumference difference with the circumference on the other side, that is, ΔL = L2−L1 = 0.3 mm, each of the nine metal rings 110 is connected to each target circumference R _n. Can be stretched at the same time.

Moreover, in the thin plate material circumference adjusting device 120 according to the present embodiment,
(8) An annular metal ring stack in which nine metal rings 110 whose circumferences are changed in stages are overlapped and stacked in a stacking direction TH along the thickness direction. In the thin plate material circumferential length adjusting device 120 for forming the body 3, nine metal rings 110 are arranged in nine engaging portions 122 corresponding to the number of metal rings 110 to be laminated in the metal ring laminated body 3 (9 layers). And a pair of rollers 121 (first roller 121A, second roller 121B) configured to be able to control the distance X between the rotation axes while rotating around the rotation axis AX, and nine engaging portions 122 is disposed along the rotation axis AX direction, and is disposed adjacent to the metal ring stack 3 in the roller radial direction RD perpendicular to the rotation axis AX direction. Since, characterized in that the 10 workers of the circumferential length difference ΔR is formed by diameter difference corresponding step of the peripheral length adjusting stretching the metal ring 110 to the circumferential length R _n target is a metal in the metal rings laminated body 3 Regardless of the number of layers of the ring 110 (9 layers), it can be integrated into one process, and the number of circumference adjustment steps is divided into the number of processes for lamination, and the circumference of each thin plate is adjusted in each process. Compared to the conventional peripheral length adjusting device, it can be greatly reduced. Therefore, the total processing time required to adjust the circumference of all the metal rings 110 laminated by the metal ring laminate 3 can be achieved by adjusting the circumference of the metal ring 110 for one layer. The manufacturing cost required for adjusting the circumference of 110 can be greatly reduced.

  Further, unlike the conventional circumferential length adjusting device, the thin plate material circumferential length adjusting device 120 according to the present embodiment does not need to install the number of facilities corresponding to the number of stacked layers (9 layers), and is a space for one unit. As a result, it is possible to reduce the space required for installation in the factory. Further, in the conventional peripheral length adjusting device, when adjusting the peripheral lengths of a plurality of types of thin plate materials having different arrangement positions in the stacking direction with the same device, due to the difference in the arrangement position in the stacking direction, between the thin plate materials. Although the setup change work for providing the circumference difference is required, the thin plate material circumference adjustment device 120 according to the present embodiment does not have such setup change work. Therefore, the manufacturing cost for adjusting the circumference of the metal ring 110 can be reduced. Furthermore, since it is not necessary to install the number of facilities corresponding to the number of stacked layers, the sheet material circumference adjusting device 120 according to the present embodiment can greatly reduce the facility cost required for installation.

Therefore, according to the thin plate material circumference adjusting device 120 of the present embodiment, in the same circumference adjusting step without increasing the number of facilities of the circumference adjusting device, all kinds of metal rings 110 constituting the metal ring laminate 3 are the circumferential length R _n of different target respectively, can be adjusted at a low cost, it exhibits the excellent effect that.

(10) In the thin plate material circumferential length adjusting device 120 described in (8) or (9), all of the engaging surfaces 122a of the nine engaging portions 122 are formed in a tapered shape with respect to the rotation axis AX direction. In the state before stretching, the circumferential length on one side with respect to the width direction (vertical direction in FIG. 19) of the metal ring 110 orthogonal to the thickness direction TH and the circumferential direction, and the other For the tapered metal ring 110 having a circumference difference with respect to the circumference on the side, that is, ΔL = L2−L1 = 0.3 mm, each of the nine metal rings 110 is connected to each target circumference R _n. Can be stretched at the same time.

In the above, the present invention has been described with reference to the first and second embodiments. However, the present invention is not limited to the first and second embodiments, and can be appropriately modified and applied without departing from the gist thereof. .
(1) For example, in the first and second embodiments, the pair of rollers 21 supported at both ends of the rotation axis AX are supplementarily supported by the roller support unit 30, but the roller support unit 30 is not provided and the pair of rollers is You may arrange | position by both ends support. FIG. 5 is a front view showing a roller according to the first modification. Specifically, in the pair of rollers 221 (the first roller 221A and the second roller 221B), as shown in FIG. 5, the first engaging portion 222A, the second engaging portion 222B, the third engaging portion 222C, The fourth engaging portion 222D, the fifth engaging portion 222E, the sixth engaging portion 222F, the seventh engaging portion 222G, the eighth engaging portion 222H, and the ninth engaging portion 222I are formed in a series. Has been. One end side (lower side in FIG. 5) of the shaft portion 223 of the first roller 221A is connected to the servo motor 41A, while the other end side (upper side in FIG. 5) of the shaft portion 223. ) Is supported by a bearing 43 inside the tailstock 42A. Similarly to the first roller 221A, a servo motor 41B is connected to one end of the shaft 223 of the first roller 221B in the rotation axis AX direction, while the other end of the shaft 223 is connected to the tail stock 42B. It is supported by a bearing 43 inside.

(2) In addition to the first modified example, a second modified example is also conceivable. FIG. 6 is a front view showing a roller according to the second modification. In the pair of rollers 321 (first roller 321A, second roller 321B) according to the modified example 2, as shown in FIG. 6, the first engaging portion 322A, the second engaging portion 322B, the third engaging portion 322C, The fourth engaging portion 322D, the fifth engaging portion 322E, the sixth engaging portion 322F, the seventh engaging portion 322G, the eighth engaging portion 322H, and the ninth engaging portion 322I are formed in a row. Has been. One end side (lower side in FIG. 6) of the shaft portion 323 of the first roller 321A is connected to the servo motor 41A by cantilever support, but the other end side (in FIG. 6) of the shaft portion 323 is connected. The upper side) is free. Similarly to the first roller 321A, one end side of the shaft portion 323 of the first roller 321B in the rotational axis AX direction is connected to the servo motor 41B by cantilever support, but the other end side of the shaft portion 323 is free. It has become. In the first and second modified examples, it is assumed that the pair of rollers have high rigidity so that the pair of rollers does not bend by the tension applied when adjusting the circumference of the thin plate material.

(3) In the first and second embodiments, the metal ring laminate 3 in which nine layers of the metal rings 10 are laminated is described as an example, but the number of thin plate members in the thin plate laminate is other than nine layers. Also, for example, 6 layers, 12 layers, and the like can be appropriately changed depending on the specifications of the product (CVT). Similarly, the number of engaging portions of the pair of rollers can be appropriately changed according to the number of thin plate members stacked in the thin plate member laminate.

(4) In the first embodiment, the intermediate shaft portion 24 between the adjacent fourth engaging portion 22D and the fifth engaging portion 22E is supplementarily supported by the roller support unit 30, but the roller support means Thus, the positions for supporting the adjacent engaging portions and the number of supporting portions are not limited to the embodiment and can be variously changed.

(5) In the first and second embodiments, the pair of rollers 21 (the first roller 21A and the second roller 21B) are rotated by the servo motor 41A and the servo motor 41B, but the wound thin plate material is rotated. As long as it is a motor that rotates at high speed with high accuracy without unevenness, for example, a spindle motor may be used, and the rotational drive source of the pair of rollers can be appropriately changed without being limited to the servo motor.

(6) In the first and second embodiments, the pair of rollers 21 (the first roller 21A and the second roller 21B) are rotated by the servo motor 41A and the servo motor 41B, respectively. However, if the wound thin plate material can be rotated at high speed with high accuracy without rotation unevenness, on the premise of this, one side of the pair of rollers is driven by a motor and the opposite side is driven. Instead of being driven to rotate by the motor, the driven side may depend on the rotation on the driving side.

1 CVT belt (metal belt)
3 Metal ring laminate (thin plate laminate)
10 Metal ring (thin plate)
20,120 Thin plate material circumference adjusting device 21, 121 A pair of rollers 21A, 121A First roller (a pair of rollers)
21B, 121B Second roller (a pair of rollers)
22, 122 engaging portions 22A, 122A first engaging portions 22B, 122B second engaging portions 22C, 122C third engaging portions 22D, 122D fourth engaging portions 22E, 122E fifth engaging portions 22F, 122F first 6 engaging portions 22G and 122G 7 engaging portions 22H and 122H 8 engaging portions 22I and 122I 9 engaging portions 22D and 22E 30 adjacent engaging portions 30 roller support unit (roller supporting means)
41C Servo motor (servo motor)
TH Stacking direction D Width direction AX Rotating shaft RD Roller radial direction X Rotating shaft distance R _n Target circumference T Tension

Claims (12)

There are a plurality of metal thin plate materials formed in an annular shape, and each circumferential length of the plurality of thin plate materials is changed stepwise to superimpose the plurality of thin plate materials in the stacking direction along the thickness direction. In the method for adjusting the circumference of the annular thin plate material for forming the laminated annular thin plate material,
Using a pair of rollers that wrap around each of the predetermined number of the thin plate materials to be laminated around a predetermined number of engaging portions corresponding to the number of laminated thin plate materials laminated by the thin plate material laminate,
In the pair of rollers, the predetermined number of the engaging portions are arranged along the rotation axis direction of the rollers, and the thin plate material lamination is performed with respect to the roller radial direction orthogonal to the rotation axis direction. Each formed with a diameter difference corresponding to a difference in circumference between the thin plate members arranged adjacent to each other in the stacking direction in the body,
With the pair of rollers rotating around the rotating shaft and the predetermined number of the thin plate members orbiting, the pair of rollers are separated from each other in a direction to increase the distance between the rotating shafts of the pair of rollers. A method for adjusting the circumferential length of the annular thin plate material, wherein each of the predetermined number of the thin plate materials is simultaneously stretched to a plastic deformation region to obtain a target circumferential length. In the method for adjusting the circumference of the annular thin plate material according to claim 1,
A circumferential length adjusting method for an annular thin plate material, wherein the thin plate material is crowned following the shape of the engaging portion. In the method for adjusting the circumferential length of the annular thin plate material according to claim 1 or 2,
The circumferential length adjusting method for an annular thin plate material, wherein the predetermined number of the engaging portions are all formed in a tapered shape with respect to the rotation axis direction. In the method for adjusting the circumference of the annular thin plate member according to any one of claims 1 to 3,
In the state before stretching, the circumference of the thin plate material is the same regardless of the arrangement position in the stacking direction,
The predetermined number of the thin plate members are associated with the predetermined number of the engagements by associating the disposition position of the thin plate members with respect to the stacking direction and the disposition position of the engaging portion with respect to the rotation axis direction in a one-to-one relationship. A circumferential length adjusting method for an annular thin plate material, characterized in that a tension is applied to all of the predetermined number of the thin plate materials, and the tension acting on the thin plate material is uniformly applied to the rotating portion. In the circumferential length adjustment method of the annular thin plate material according to any one of claims 1 to 4,
A method for adjusting the circumferential length of an annular thin plate material, wherein the distance between the rotating shafts is controlled to stretch the predetermined number of the thin plate materials to the respective target circumferential lengths. In the method for adjusting the circumference of the annular thin plate member according to any one of claims 1 to 5,
A first step of setting the distance between the rotating shafts to a distance that allows the pair of rollers to be inserted into the entire circumference with respect to the predetermined number of the thin plate members before being stretched;
After the first step, in a state where the predetermined number of the thin plate members are combined into one, the pair of rollers are relatively inserted into the circumference of the predetermined number of the thin plate members, and the predetermined number of the thin plate members are inserted. A second step of holding the plate material in the predetermined number of the engaging portions in a state where tension is applied in the elastic deformation region;
After the second step, while rotating the pair of rollers, the third step of expanding the distance between the rotating shafts until the target circumferential length of each of the predetermined number of the thin plate material,
A method for adjusting the circumferential length of an annular thin plate material, comprising: In the method for adjusting the circumferential length of the annular thin plate member according to any one of claims 1 to 6,
The thin plate material is a steel ring, and the thin plate laminate is a metal ring laminate in which the steel rings are laminated as a part of a metal belt configured in a continuously variable transmission. A method for adjusting the circumference of an annular thin plate material. An annular thin sheet material laminate formed by laminating a plurality of the thin sheet materials whose circumferential lengths are changed in a stepwise manner in a laminating direction along the thickness direction with a thin metal sheet material formed in an annular shape. In the thin plate material circumference adjusting device for forming,
The predetermined number of the thin plate members are wound around a predetermined number of engaging portions corresponding to the number of the thin plate members to be stacked by the thin plate member laminate, and are rotated about the rotation axis. Comprises a pair of rollers configured to be controllable,
The predetermined number of the engaging portions are disposed along the rotation axis direction, and the thin plate member is disposed adjacent to the roller radial direction perpendicular to the rotation axis direction. A thin plate material circumferential length adjusting device, characterized by being formed with a diameter difference corresponding to a circumferential length difference between plate materials. In the thin sheet material circumference adjusting device according to claim 8,
The predetermined number of the engaging portions are formed in an R shape corresponding to a crowning attached to the thin plate material or an uneven shape attached to the thin plate material in the roller radial direction. Plate material circumference adjustment device. In the thin plate material circumference adjusting device according to claim 8 or 9,
The thin plate member circumferential length adjusting device, wherein the predetermined number of the engaging portions are all formed in a tapered shape with respect to the rotation axis direction. In the thin sheet material circumference adjusting device according to any one of claims 8 to 10,
A thin plate member circumferential length adjusting device, wherein the distance between the rotating shafts is controlled by a servo motor. In the thin sheet material circumference adjusting device according to any one of claims 8 to 11,
The pair of rollers is provided with cantilever support or both-end support with respect to the rotation axis direction,
A thin plate member circumferential length adjusting device comprising roller support means for supporting the pair of rollers from the roller radial direction at a position between the adjacent engaging portions.

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