JP2019038066A - Work-piece supporting tool and gear processing device equipped with same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work support capable of fixing an object to be fixed having a small inner diameter, and a gear processing device provided with the work support. A work support according to the present invention is a work support for detachably fixing a gear to be machined, and is a support main body having a columnar support surface over the entire circumference of the support surface. A support body in which a recess is formed and at least one second passage that communicates with the first passage and opens in the recess of the support surface is formed inside. A cylindrical deformable member to which the recess is liquidtightly closed on the support surface and the gear to be machined is attached to the outer peripheral surface, a movable member movable in the first passage, and the movable member. The recess, the first passage, and the second passage are provided with a pressing member for pressing the pressing member in the first direction to reduce the volume of the first passage and an urging means for urging the pressing member in the first direction. The passage is filled with hydraulic oil. [Selection diagram] Fig. 3

Description

  The present invention relates to a workpiece support and a gear machining apparatus including the workpiece support.

  When processing the gears formed on the outer periphery of the workpiece, the phases of the teeth of a grindstone or cutter (generally referred to as a tool) are phase-matched, and then meshed with the workpiece. And rotate the workpiece synchronously to machine the workpiece teeth. At that time, in order to increase mass production efficiency, for example, Patent Document 1 discloses the following method. That is, the work is fixed to a support called an arbor, and the arbor is transported from the work replacement position to the machining position. And the phase alignment of the workpiece | work with respect to the tooth | gear part of a grindstone is performed in the exchange position. It is necessary to securely clamp the workpiece that has undergone phase alignment to the arbor.

JP2015-136747 A

  In the apparatus according to Patent Document 1, the collet chuck provided in the arbor is fixed to the arbor by stretching it on the inner peripheral surface of the through hole of the workpiece. However, since the collet chuck has a large number of parts, there is a problem that the outer diameter of the part into which the work is inserted becomes large, and it is impossible to fix the work having an inner diameter with a small through hole. Such a problem is a problem that may occur even when the workpiece is other than a gear, and may be a problem that may occur in general support tools that press and fix a through hole or the like of an object to be fixed from the inside. The present invention has been made to solve the above-described problem, and an object of the present invention is to provide a work support that can reliably fix an object to be fixed having a small inner diameter, and a gear machining apparatus including the work support. To do.

  A work support according to the present invention is a work support that removably fixes a gear to be processed, and is a support body having a cylindrical support surface, and a recess is formed over the entire circumference of the support surface. A support body having a first passage extending in the axial direction of the support surface, and at least one second passage communicating with the first passage and opening in a recess of the support surface; A cylindrical deformation member, which is attached so as to liquid-tightly seal the recess and the work gear is attached to an outer peripheral surface, a movable member movable in the first passage, and the movable member, A pressing member that presses the volume of one passage in a first direction; and an urging means that constantly urges the pressing member in the first direction, and operates in the recess, the first passage, and the second passage. Filled with fluid.

  According to the workpiece support tool according to this configuration, the workpiece is pressed and fixed by the deformable member that is deformed by hydraulic pressure, so that it is possible to fix the workpiece having a small diameter. That is, since the work support has a simple configuration in which the first and second passages are formed inside and the cylindrical deformable member is attached, the outer diameter can be reduced. On the other hand, for example, when trying to fix a workpiece with a so-called collet chuck, the collet chuck has a large number of parts, so the outer diameter cannot be reduced. Therefore, by adopting the configuration as in the present invention, it is possible to fix a work having a small diameter.

  In addition, since the workpiece support has a configuration in which the movable member is constantly pressed by the pressing member, once the workpiece is attached to the workpiece support, the workpiece is fixed unless the pressing member is pulled. to continue. Therefore, it is possible to prevent the rotational position of the workpiece from changing even if the workpiece support is moved while the workpiece is attached to the workpiece support.

  In the work support tool, the pressing member includes a first part and a second part, and the support main body communicates with the first passage and houses the first part of the pressing member and the biasing means. An accommodation space may be provided, and the second portion of the pressing member may protrude outward from the support body.

  A gear machining apparatus according to the present invention includes any one of the above-described work support tools, a first work support unit that removably supports the work support tool, and rotates the work support tool. Without changing the rotational position, a workpiece moving unit that attaches / detaches the workpiece gear to / from the workpiece support, and the workpiece support is supported by the first workpiece support unit. A detection unit that detects a rotational position of the supported gear to be supported; and the workpiece gear that is detected by the detection unit while the workpiece gear is being detached from the workpiece support by the workpiece moving unit. A control unit for controlling the workpiece support unit to rotate the workpiece support to a rotation position having a predetermined phase difference from the rotation position of the workpiece, and the workpiece support A workpiece transport unit that moves the tool from the workpiece support unit to a machining position, a second workpiece support unit that is disposed at the machining position, supports the workpiece support detachably, and rotates the workpiece support; A tool unit having a tool that processes the gear to be processed while rotating while meshing with the gear to be processed supported by the second work support unit, and the work support tool and the tool are the predetermined unit Control is performed by the control unit so as to rotate synchronously based on the phase difference.

  According to this configuration, after the rotation position of the gear to be processed is detected by the detection unit, the gear to be processed is separated from the work support without changing the rotation position. Then, the workpiece support is rotated to a rotation position that has a predetermined phase difference from the rotation position of the gear to be processed detected by the detection unit. Therefore, when the workpiece gear is mounted again on the workpiece support, the phase difference between the rotational positions of the workpiece support and the workpiece gear is set in advance. Therefore, no matter what rotational position of the work gear is mounted on the work support, the phase difference between the work gear and the work support is always constant. As a result, it is not necessary to transmit information regarding the rotational position of the workpiece gear when the workpiece support with the workpiece gear mounted on the phase difference is conveyed to the second workpiece support unit. That is, since the phase difference between the gear to be processed and the workpiece support is set in advance, the gear to be processed and the tool are connected to each other at the processing position based on the phase difference without obtaining information individually. It can be processed while rotating synchronously. Therefore, the gear to be machined can be machined without transmitting information between the first work support unit and the second work support unit.

  In the gear processing apparatus, the work support is supported by the first and second work support units, respectively, and the work transport unit is supported by the first and second work support units, respectively. The workpiece support can be configured to be interchangeable.

  According to this configuration, since the workpiece transfer unit is configured to be able to replace the workpiece support supported by the first and second workpiece support units, for example, the workpiece gear supported by the second workpiece support unit. While the is being processed, the above-described phase difference can be set in the first work support unit. Accordingly, the time required for setting the rotational position can be omitted, and efficient machining can be performed.

  In each of the gear machining apparatuses, the first work support unit can have various configurations. For example, a rotary member that detachably supports the work support, and a support that rotatably supports the rotary member. A body, a drive unit that rotates the rotating member, and a pulling unit that can pull the pressing member of the work support tool in a second direction opposite to the first direction, and the control unit includes: The drive unit may be controlled to rotate the rotating member to a rotation position having a predetermined phase difference from the rotation position of the gear to be processed detected by the detection unit.

  In each of the gear machining apparatuses, the second workpiece support unit can have various configurations. For example, a rotating member that detachably supports the workpiece support, and a support that rotatably supports the rotating member. A body and a drive unit that rotates the rotating member.

  According to the present invention, an object to be fixed having a small inner diameter can also be fixed.

FIG. 1 is a front view of a gear machining apparatus according to the present embodiment. It is a side view of FIG. It is sectional drawing of the arbor which supported the workpiece | work. It is an expanded sectional view of FIG. It is sectional drawing of a 1st workpiece | work support unit. It is sectional drawing which shows the upper end vicinity of a 1st workpiece | work support unit. It is sectional drawing which shows the upper end vicinity of a 1st workpiece | work support unit. It is sectional drawing which shows the upper end vicinity of a 1st workpiece | work support unit. It is an upper top view of a support body. It is a front view of a moving body. It is a side view of FIG. It is sectional drawing of a conveyance part. It is a top view of a rotation support part. It is sectional drawing of FIG. It is AA sectional view taken on the line of FIG. It is the BB sectional drawing of FIG. It is operation | movement explanatory drawing from FIG. It is sectional drawing of a 2nd workpiece support unit. It is sectional drawing which shows the upper end vicinity of a 2nd workpiece support unit. It is sectional drawing which shows the upper end vicinity of a 2nd workpiece support unit. It is operation | movement explanatory drawing of a conveyance part.

Hereinafter, an embodiment of a gear machining apparatus according to the present invention will be described with reference to the drawings.
FIG. 1 is a front view of a gear machining apparatus according to the present embodiment, and FIG. 2 is a side view of FIG.

  As shown in FIGS. 1 and 2, this gear machining apparatus grinds a workpiece W, which is a workpiece gear, while rotating in synchronization with a grindstone 10, which is a tool. Then, the workpiece machining position detection unit 1 for detecting the rotation position of the workpiece W, the workpiece machining unit 2 that performs grinding while rotating the workpiece W and the grindstone 10 synchronously, and the workpiece machining position detection unit 1 determine the rotation position. A transport unit 3 that transports the detected workpiece W to the workpiece processing unit 2 and a base unit 4 that supports them are provided. The workpiece W is mainly supported by a workpiece support tool called an arbor 5, and is transferred from the workpiece machining position detection unit 1 to the workpiece machining unit 2 by the transport unit 3 while being supported by the arbor 5. Hereinafter, each part will be described in detail.

  First, the workpiece | work W and the arbor 5 which supports this are demonstrated, referring FIG.3 and FIG.4. 3 is a cross-sectional view of the arbor 5 that supports the workpiece W, and FIG. 4 is an enlarged cross-sectional view of FIG. As shown in these drawings, the workpiece W is a gear having a through-hole formed in the center, and the arbor 5 is a member that supports the workpiece W. The arbor 5 includes a truncated cone-shaped lower base portion 511, a cylindrical closing portion 512 protruding downward from the lower end of the lower base portion 511, and a columnar tip portion 513 extending upward from the upper end of the lower base portion 511. An arbor body 51 formed integrally is provided. As will be described later, a cylindrical storage space 510 is formed in the lower portion of the lower base portion 511, and the closing portion 512 is disposed so as to close the storage space 510. In the arbor body 51, a flange 514 extending radially outward is formed at the lower end of the lower base 511. Further, the lower surface of the flange 514 is formed with recesses 515 at a plurality of locations in the circumferential direction. Furthermore, an annular groove 516 is formed on the outer peripheral surface of the lower base 511 above the flange 514 so as to be held by a holding arm 351 described later.

  A through hole extending in the axial direction is formed inside the arbor body 51. First, a first through hole 571 extending from the accommodation space 510 of the lower base 511 to the vicinity of the lower end of the front end 513 is formed. Further, the first through hole extends from the upper end of the first through hole 571 to the vicinity of the upper end of the front end 513. A second through hole 572 having an inner diameter smaller than 271 is formed. Further, the closing part 512 is formed with a third through hole 573 extending downward from the accommodation space 510 of the lower base part 511. A cylindrical movable member 52 is accommodated in the first through hole 571, and the first through hole 571 can be slid in a liquid-tight manner. The pressing member 53 is accommodated in the accommodation space 510 and the third through hole 573. The pressing member 53 includes a columnar main body portion 531 and a flange portion 532 that extends radially outward from the upper end of the main body portion 531. The upper portions of the flange portion 532 and the main body portion 531 are accommodated in the accommodation space 510, and the lower portion of the main body portion 531 extends downward from the third through hole 573.

  A spring 54 is provided between the lower surface of the flange portion 532 and the bottom surface of the accommodation space 510, and the pressing member 53 is biased upward by the spring (biasing means) 54. Thereby, the pressing member 53 always presses the movable member 52 upward.

  On the other hand, a stopper 533 extending radially outward and a rod-like operation portion 534 extending downward are provided at the lower portion of the main body portion 531. The stopper 533 is engaged with the peripheral edge of the opening below the third through hole 573, thereby restricting the upward movement range of the pressing member 53. Further, a substantially cylindrical engaging portion 535 having a large diameter is provided at the lower end of the operation portion 534.

  Next, the tip 513 of the arbor body 51 will be described with reference to FIG. As shown in FIG. 4, a concave portion 574 having a shallow depth is formed on the outer peripheral surface of the distal end portion 513 over the entire circumference. The recessed portion 574 extends in the axial direction of the distal end portion, and an O-ring 55 that covers the entire outer peripheral surface of the distal end portion is disposed at the upper end portion and the lower end portion of the recessed portion 574. And the cylindrical deformation member 56 is arrange | positioned so that this recessed part 574 may be covered. The deformable member 56 is formed of a thin metal plate and is disposed so as to cover the recess 574 together with the O-ring 55 in a liquid-tight manner. In addition, a plurality of communication holes 575 extending outward in the radial direction are formed from the tip of the second through hole 572 described above. Each communication hole 575 is open at a recess 574. Accordingly, the recess 574, the first through hole 571, the second through hole 572, and the communication hole 575 are in communication, and the inside is filled with hydraulic oil (working fluid). Therefore, in a state where the movable member 52 is pressed upward (first direction), pressure is applied to the hydraulic oil, whereby the deformation member 56 is deformed so as to spread outward in the radial direction. The deformable member 56 presses the through hole of the workpiece W inward in the radial direction, so that the workpiece W is fixed to the arbor 5. On the other hand, when the pressing member 53 is pulled downward (second direction) against the urging force of the spring 54, the pressing force acting on the movable member 52 is released, so that the movable member 52 moves downward. Thereby, the pressure which acts on hydraulic fluid falls and the deformation member 56 shrinks radially inward. In this state, 5 workpieces W can be removed from the arbor. In addition, in the front-end | tip part 513 of the arbor 5, the part to which the deformation | transformation member 56 is attached comprises the support surface of this invention.

  Next, the workpiece machining position detection unit 1 will be described. As shown in FIGS. 1 and 2, the workpiece machining position detection unit 1 includes a first workpiece support unit 11 and a workpiece suspension unit 12. The first work support unit 11 is disposed on the base portion 4. An upper support 41 is provided on the base 4, and the work suspension unit 12 is supported by the upper support 41 and grips the work W supported by the first work support unit 11 from above. It is configured as follows.

  First, the first work support unit 11 will be described with reference to FIG. FIG. 5 is a cross-sectional view of the first work support unit 11. As shown in the figure, the first work support unit 11 includes a cylindrical support body 111 that is supported by the base portion 4 and whose axis extends in the vertical direction. The support body 111 extends so as to protrude upward from the base portion 4, and a cylindrical rotation support member 112 is disposed inside. A push-pull rod 113 that can move in the vertical direction is disposed in the through hole inside the rotation support member 112. The rotation support member 112 is rotatably supported by the upper bearing 114 and the lower bearing 115 inside the support body 111. A built-in motor (drive unit) 116 is disposed below the upper bearing 114. Specifically, a built-in motor 116 including a rotor 1161 provided on the outer peripheral surface of the rotation support member 112 and a stator 1162 disposed so as to face the rotor 1161 inside the support body 111 is provided. Yes. An annular groove 1163 is formed on the outer peripheral surface of the stator 1162, and an introduction path 1164 for introducing cooling water for cooling the stator 1162 and a discharge for discharging the introduced cooling water are formed in the groove 1163. The path 1165 is connected. In addition, even if it is except the built-in motor 116, if the rotation support member 112 can be rotated, it will not specifically limit.

  The above-described arbor 5 is detachably attached to the upper end portion of the rotation support member 112. Specifically, a cylindrical engagement member 117 is attached to the upper end portion of the rotation support member 112, and the closing portion 512 of the arbor 5 is inserted into the engagement member 117. In addition, protrusions 1171 are provided at a plurality of locations on the upper end of the engagement member 117, and the protrusions 1171 are fitted into the recesses 515 of the arbor 5. Thereby, the arbor 5 is supported on the rotation support member 112 so as not to rotate around the axis.

  On the outer peripheral surface of the rotation support member 112, an annular detected portion 1121 is attached above the upper bearing 114. A sensor 1111 is provided at a position facing the detected part 1121 in the internal space of the support body 111. Thereby, the rotational position of the detected part 1121, that is, the rotational position of the arbor 5 can be detected by the sensor 1111. The support body 111 is provided with a control unit (not shown) that rotates the rotation support member 112 to a predetermined rotation position based on the rotation position of the rotation support member 112 detected by the sensor 1111. In addition to controlling the built-in motor 116, the control unit can perform overall control of operations performed by the workpiece machining position detection unit 1.

  The internal space of the rotation support member 112 includes a small-diameter portion 1122 that extends in the vertical direction and a large-diameter portion 1123 that continues to the small-diameter portion 1122 below, and the push-pull rod 113 described above is inserted into the internal space. ing. The push-pull rod 113 is inserted into the small-diameter portion 1122, and is connected to the upper end portion of the rotation support member 112, that is, the rod main body 1131 protruding from the engaging member 117, and the cylindrical pressing portion connected to the lower portion of the rod main body 1131 and having a large diameter. 1132. And the press part 1132 is accommodated in the large diameter part 1123 of internal space. Further, in the internal space of the rotation support member 112, a spring 118 wound around the rod body 1131 of the push-pull rod 113 is interposed between the step portion at the boundary between the small diameter portion 1122 and the large diameter portion 1123 and the pressing portion 1132. Is provided. By this spring 118, the pressing portion 1132 is urged downward, and thereby the push-pull rod 113 is normally urged downward. Further, a concave portion 1133 extending in the vertical direction is formed on the outer peripheral surface of the pressing portion 1132 of the push-pull rod 113, and a protruding member 1125 extending from the inner wall surface of the rotation support member 112 is engaged with the concave portion 1133. The projecting member 1125 prevents the push-pull rod 113 from falling downward, and the recess 1133 has a predetermined length in the vertical direction, thereby restricting the range of movement of the push-pull rod 113 in the vertical direction.

  A double-acting hydraulic cylinder 119 that is driven below the rotation support member 112 is provided in the lower portion of the support body 111. The piston 1191 of the hydraulic cylinder 119 can move up and down, and is configured to press the pressing portion 1132 of the push-pull rod 113 from below. In addition, since a clearance is formed between the push-pull rod 113 and the rotation support member 112 and the piston 1191 at all times, the rotation support member 112 can rotate with the push-pull rod 113 without interfering with the piston 1191. It has become.

  At the tip of the push-pull rod 113, a fixing mechanism for detachably fixing the operation portion 534 of the arbor 5 is provided. This point will be described with reference to FIGS. 6 and 7 are enlarged views of the upper part of the first work support unit 11 to which the arbor 5 is attached.

  As shown in FIG. 6, a cylindrical fixing member 1134 is attached to the tip of the push-pull rod 113, and the operation portion 534 of the arbor 5 is inserted from the opening at the upper end. In addition, through holes 1135 having a circular cross section are formed at predetermined positions in the circumferential direction at a plurality of locations on the wall surface of the fixing member 1134. In each through hole 1135, a sphere 1136 is accommodated. On the other hand, on the inner wall surface of the through hole of the rotation support member 112, a protrusion 1129 that protrudes inward in the radial direction is formed at a position facing the fixing member 1134 of the push-pull rod 113.

  As shown in FIG. 6, when the arbor 5 is fixed to the first work support unit 11, the push-pull rod 113 is pulled downward, and the fixing member 1134 has a position where the through hole 1135 faces the protrusion 1129. Pulled down. At this time, the ball 1136 of the through hole 1135 is pushed inward in the radial direction by the protrusion 1129 and protrudes into the internal space of the fixing member 1134. In this state, each ball 1136 engages with the upper end of the engaging portion 535 of the operation portion 534 of the arbor 5 and holds the arbor 5 so that it does not come out upward. As a result, the arbor 5 is fixed to the rotation support member 112 and can be rotated together with the rotation support member 112. At this time, a mechanism (fixing mechanism, push-pull rod, etc.) for pulling the operation portion 534 of the arbor 5 downward constitutes the tension means of the present invention.

  On the other hand, when removing the arbor 5, the push-pull rod 113 is pushed upward as shown in FIG. As a result, the fixing member 1134 is also pushed upward, so that the through hole 1135 of the fixing member 1134 is positioned above the protrusion 1129. Therefore, the pressure on the ball 1136 by the protrusion 1129 is released, and the ball 1136 moves outward in the radial direction. As a result, the engagement between the ball 1136 and the engaging portion 535 of the arbor 5 is released, and the arbor 5 can be detached from the first work support unit 11. Similarly, when attaching the arbor 5, the push-pull rod 113 is pushed upward, and the arbor 5 is attached in this state.

  In addition, four fixing portions 1113 for fixing the arbor 5 are provided on the upper surface of the support body 111. This point will be described with reference to FIGS. FIG. 8 is a cross-sectional view showing the vicinity of the upper end of the support body, and FIG. 9 is an upper plan view showing the operation of the support body.

  As shown in FIGS. 8 and 9, the four fixing portions 1113 are arranged every 90 degrees around the rotation support member 112. Each fixing portion 1113 includes a base portion 1114, a shaft member 1115 protruding from the upper surface of the base portion 1114, and an arm 1116 that can be rotated by the shaft member 1115. The arm 1116 is housed in the base 1114 and can be rotated in the horizontal direction and moved up and down by a hydraulic drive mechanism (not shown). In FIG. 9A, each arm 1116 is separated from the arbor 5, but by rotating from this position, each arm 1116 becomes arbor 5 as shown in FIG. 8 and FIG. 9B. Engaging the upper surface of the flange 514 of the. As a result, the arbor 5 is restricted from coming out upward.

  Although not shown, the workpiece machining position detector 1 is provided with a detector that detects the rotational position of the workpiece W fixed to the arbor 5. The rotational position of the workpiece W detected by the detection unit is transmitted to the control unit described above.

  Next, the workpiece suspension unit 12 will be described. As shown in FIG. 1, the workpiece suspension unit 12 includes a rail 121 that is supported by the upper support 41 and extends in the vertical direction, and a movable body 122 that can move in the vertical direction along the rail 121. Yes. A ball screw (not shown) is connected to the moving body 122, and an elevating motor 123 of the moving body 122 is connected to the upper end of the ball screw.

  Next, the moving body 122 will be described with reference to FIGS. 10 and 11. 10 is a front view of the moving body, and FIG. 11 is a side view of FIG. As shown in FIGS. 10 and 11, the moving body 122 includes a plate-like first support member 1221 supported so as to be movable with respect to the rail 121 and a first support member 1221 disposed below the first support member 1221. 2 support members 1222. Both support members 1221 and 1222 are connected by a guide rod 1223.

  A double-acting air cylinder 1224 is attached to the second support member 1222, and a pair of L-shaped link members 1227 are engaged with the tip 1226 of the piston 1225 of the air cylinder 1224. Therefore, when the piston 1225 advances and retreats in the vertical direction, the lower ends of the link members 1227 come close to and separate from each other.

  Further, a clamping arm 1229 for clamping the workpiece W is engaged with the lower end portion of each link member 1227 as will be described later. As shown in FIG. 11, both the sandwiching arms 1229 are formed in an L shape when viewed from the front, and the upper end portion thereof is supported by a rail 1231 formed at the lower end portion of the second support member 1222. As a result, both the sandwiching arms 1229 can approach and separate in the horizontal direction. Therefore, as described above, when the piston 1225 advances and retreats, the workpiece W is clamped / unclamped by the clamping arm 1229.

  In addition, a cylindrical cap member 1232 is attached to the lower end portion of the second support member 1222 between the sandwiching arms 1229. As will be described later, the cap member 1232 is configured to come into contact with the upper end surface of the workpiece W.

  Next, the transport unit 3 will be described with reference to FIG. FIG. 12 is a cross-sectional view of the transport unit. As shown in the figure, the transport unit 3 includes a cylindrical base 31 fixed to the base 4 and a rod-shaped main shaft member 32 extending along the internal space of the base 31. . The main shaft member 32 is supported by a drive unit 33 provided at the lower end portion of the base portion 31 so as to be movable in the vertical direction along the base portion 31, and is supported so as to be rotatable around the shaft. . The upper end portion of the main shaft member 32 protrudes from the upper end of the base portion 31, and a rotation support portion 34 extending in the horizontal direction is supported on the upper end portion so as to be rotatable around the axis of the main shaft member 32. A gripping unit 35 for detachably gripping the arbor 5 is attached to each end of the rotation support portion 34. Each gripping unit 35 includes a pair of gripping arms 36 for sandwiching the arbor 5. The opening / closing control of the gripping arm 36 is performed by an arm control unit 37 provided at the upper end of the base portion 31.

  Next, the rotation support portion 34 and the gripping unit 35 will be described with reference to FIGS. 13 is a plan view of the rotation support portion 34, and FIG. 14 is a cross-sectional view of FIG. The rotation support portion 34 includes a substrate portion 341 formed of a plate-like member extending in the horizontal direction. A central portion in the horizontal direction of the substrate portion 341 is rotatably supported at the tip of the main shaft member 32. The above-described gripping unit 35 is provided on the lower surfaces of both end portions of the substrate portion 341. Since both the gripping units 35 have the same configuration, only one gripping unit 35 will be described below.

  The gripping unit 35 includes a pair of sandwiching arms 351 and is arranged at a predetermined interval in the horizontal direction at the end of the substrate portion 341. The sandwiching arm 351 is formed so as to extend along the substrate portion 341 as a whole, and a central portion in the length direction is fixed to the substrate portion 341 by a shaft member 352 so as to be swingable. And the base end parts by the side of the main shaft member 32 of each clamping arm 351 are connected by the spring 353, Thereby, the base end parts of each clamping arm 351 are urged | biased so that it may always space apart. . On the other hand, a clamping surface 3511 formed in an arc shape for clamping the arbor 5 is formed at the tip of each clamping arm 351. And the cylindrical outer peripheral surface of the arbor 5 can be clamped by the two clamping surfaces 3511 facing each other. Specifically, the clamping surface 3511 engages with the groove 516 of the arbor 5. As described above, the base end portions of the respective holding arms 351 are urged so as to be always separated by the spring 353, so that the holding surfaces 3511 of the respective holding arms 351 are always close to each other and hold the arbor 5. A force is acting in the direction.

  Next, the arm control unit 37 will be described with reference to FIGS. 15 and 16. 15 is a cross-sectional view taken along line AA in FIG. 14, and FIG. 16 is a cross-sectional view taken along line BB in FIG. As shown in FIG. 16, in the present embodiment, one arm control unit 37 is provided for each gripping unit 35. Each arm control unit 37 is formed in an L shape in a plan view, and is configured to surround the base portion 31 of the transport unit 3 in a rectangular shape by combining them. Here, one arm control unit 37 will be described.

  The arm control unit 37 operates when the rotation support portion 34 is lowered together with the main shaft member 32, and functions to open the holding arm 351 and open the arbor 5. Specifically, as shown in FIG. 16, in a plan view, it extends in the tangential direction of the base portion 31 and is connected to the operating portion 371 that operates the holding arm 351 and is perpendicularly connected to the operating portion 371. The driving part 372 driven by the cylinder is formed in an L shape in plan view. The operating portion 371 includes a central support member 3711 fixed to the upper end portion of the base portion 31, and a pair of arm operating members 3712 that sandwich the base end portion side of the holding arm 351 from the outside on both sides thereof. Yes. And when these arm operation members 3712 adjoin, it presses so that the base end part of clamping arm 351 may adjoin.

  Here, the arm operating portion arranged on the left side of FIG. 15 with the central support member 3711 interposed therebetween is referred to as a first arm operating member 3712a, and the arm operating portion arranged on the right side is referred to as a second arm operating member 3712b. To do. A pressing pin 3713 for pressing the proximal end portion of the holding arm 351 is provided at the upper end of the first arm operating member 3712 a and extends toward the holding arm 351. A first rod 3714 extending in the horizontal direction is fixed to the lower end portion of the first arm operating member 3712a. More specifically, the first rod 3714 is fixed to a through hole provided in the lower end portion of the first arm actuating member 3712a and extends in the horizontal direction. The first rod 3714 is inserted through a through hole formed in the central support member 3711 and extends to the second arm operating member 3712b side. With this configuration, when the first rod 3714 moves in the horizontal direction, the first arm actuating member 3712a also moves with it. In addition, a through hole is formed in an intermediate portion of the first arm operating member 3712a in the vertical direction, and a second rod 3715 is inserted through the through hole. Since the second rod 3715 is not fixed to the first arm actuating member 3712a, the first arm actuating member 3712a and the second rod 3715 are movable without being restricted by their respective movements. The second rod 3715 is also inserted through a through hole formed in the central support member 3711 and extends to the second arm actuating member 3712b side.

  On the other hand, the second arm operating member 3712b is also configured in substantially the same manner as the first arm operating member 3712a. That is, a through hole is formed in the lower end portion of the second arm operating member 3712b, and the first rod 3714 is inserted through the through hole. However, since the first rod 3714 is not fixed to the second arm actuating member 3712b in this through hole, the second arm actuating member 3712b and the first rod 3714 are movable without being restricted by their movements. It is. Further, a through hole is also formed in an intermediate portion in the vertical direction of the second arm operating member 3712b, and the above-described second rod 3715 is inserted into and fixed to the through hole. Therefore, when the second rod 3715 moves in the horizontal direction, the second arm actuating member 3712b also moves along with this. Further, as shown in FIG. 15, a spring 3716 is provided at the left end of the second rod 3715, and the second rod 3715 is always urged to move to the right.

  A shaft member 3717 extending in the horizontal direction is provided near the center of the central support member 3711, that is, between the first rod 3714 and the second rod 3715. A swing member 3718 extending in a rod shape is rotatably attached to the shaft member 3717. Both ends of the swing member 3718 are engaged with notches 3700 and 3701 formed on the outer peripheral surfaces of the rods 3714 and 3715. That is, one end of the swing member 3718 is engaged with a notch 3701 of the first rod 3714 disposed on the lower side, and the other end of the swing member 3718 is engaged with a notch 3700 of the second rod 3715 disposed on the upper side. Is engaged. Thereby, the action | operation part 371 operate | moves as follows. This point will be described with reference to FIG.

  For example, in the state shown in FIG. 15, the second rod 3715 is urged to the right side by the spring 3716, and the swing member 3718 engaged therewith is urged clockwise. Accordingly, the swing member 3718 biases the first rod 3714 to the left side. As a result, in the state of FIG. 12, the first arm operating member 3712a fixed to the first rod 3714 moves to the left, and the second arm operating member 3712b fixed to the second rod 3715 moves to the right. The two arm operating members 3712a and 37b are separated from each other, and the both arm operating members 3712a and 3712b are separated from the base end portions of the holding arms 351.

  From this state, when the first rod 3714 moves to the right, the swing member 3718 engaged therewith swings counterclockwise as shown in FIG. As a result, the second rod 3715 engaged with the swing member 3718 moves to the left. That is, both rods 3714 and 3715 move to the opposite sides. Accordingly, the first arm operating member 3712a fixed to the first rod 3714 moves to the right, and the second arm operating member 3712b fixed to the second rod 3715 moves to the left. As a result, both arm actuating members 3712a and 37b are close to each other and are pressed so that the base ends of the both sandwiching arms 351 are close to each other.

  Next, the driving unit 372 that drives the first rod 3714 will be described. As shown in FIG. 16, the drive unit 372 includes a cylindrical main body 3721 and a pressing member 3722 that is supported in the main body 3721 so as to advance and retreat. The pressing member 3722 is formed in a rod shape, and a tip portion of the pressing member 3722 is in contact with a roller 3719 provided rotatably at the left end portion of the first rod 3714. On the other hand, an air cylinder 3723 is attached to the rear end portion of the pressing member 3722 so that the pressing member 3722 moves forward or backward. In addition, an inclined surface 3724 is formed at the tip of the pressing member 3722, and the inclined surface 3724 is in contact with the roller 3719. Therefore, when the pressing member 3722 moves forward, the first rod 3714 is pushed to the right side in FIG. That is, the forward movement of the pressing member 3722 is transmitted in a direction perpendicular to the inclined surface 3724 and the roller 3719 of the pressing member 3722 so as to press the first rod 3714. Thereby, both arm operation members 3712a and 37b operate as described above.

  Further, a detected portion 3725 is attached to the rear end portion of the pressing member 3722, and sensors for detecting the detected portion 3725 are provided at two locations of the main body portion 3721. That is, a first sensor 3726 that detects the detected portion 3725 when the pressing member 3722 is retracted and a second sensor 3727 that detects the detected portion 3725 when the pressing member 3722 is moving forward are provided. ing. Therefore, it is possible to detect whether the pressing member 3722 is moving forward or backward by detecting the detected portion 3725 with any one of the sensors, and further, both arm operating members 3712a and 3712b are sandwiched. It can be detected whether the arm 351 is pressed or separated.

  A pair of arm control units 37 configured as described above are provided, and each function to operate the gripping unit 35 of the transport unit 3.

  Next, the workpiece machining unit 2 will be described. As shown in FIG. 1, the workpiece processing unit 2 includes a second workpiece support unit 21 that supports the arbor 5 and a tool unit 22 that includes a grindstone 10 that processes the workpiece W. The second work support unit 21 is disposed on the base portion 4 described above, and has a configuration substantially similar to that of the first work support unit 11 described above. The second work support unit 21 will be described with reference to FIGS.

  As shown in FIG. 18, the second work support unit 21 has substantially the same configuration as that of the first work support unit 11 described above. Omitted. However, the size and shape may be slightly different even with the same code. The difference between the second work support unit 21 and the first work support unit 11 is mainly a mechanism for fixing the arbor 5. Therefore, this point will be mainly described below with reference to FIGS. 19 and 20.

  As shown in FIG. 19, a cylindrical accommodation space 701 is formed in the upper portion of the rotation support member 112, and a cylindrical accommodation portion 702 is provided in the accommodation space 701. The accommodating portion 702 is movable in the vertical direction (axial direction) within the accommodating space 701 and is always urged upward by a spring 703. Further, the accommodating portion 702 has an inner wall surface 704 having an inner diameter that is substantially the same as the outer diameter of the closing portion 512 of the arbor 5. The outer wall surface 705 of the accommodating part 702 is formed in a taper shape, and is formed so as to spread outward in the radial direction as it goes upward. On the other hand, a taper corresponding to the taper of the outer wall surface of the housing portion 702 is formed on the inner wall surface 706 of the housing space 701. That is, the inner diameter is reduced inward in the radial direction as it goes downward. Therefore, when the accommodating portion 702 moves downward, the outer wall surface 705 of the accommodating portion 702 is pressed by the inner wall surface 706 of the accommodating space 701, and the wall of the accommodating portion 702 moves radially inward. Thereby, as shown in FIG. 20, the closing part 512 of the arbor 5 accommodated in the accommodating part 702 is pressed, and the arbor 5 is fixed.

  Next, a mechanism for moving the housing portion 702 up and down will be described. As shown in FIG. 19, a rod-shaped rod 707 that protrudes downward is provided at the lower portion of the accommodating portion 702, and an engaging portion 708 that protrudes radially outward is formed at the lower end portion of the rod 707. Has been.

  The rod 707 is accommodated in a cylindrical fixing member 709 provided at the tip of the push-pull rod 113. Hereinafter, the shape of the push-pull rod 113 and the through hole of the rotation support member 112 through which the fixing member 709 passes are referred to as a reference passage 1180. Through holes 710 having a circular cross section are formed at a plurality of locations on the wall surface of the fixing member 709 at predetermined intervals in the circumferential direction. Each through hole 710 accommodates a ball 711. On the other hand, a large-diameter portion 1190 having a larger inner diameter than the reference passage 1180 is formed at the upper end of the reference passage 1180 of the rotation support member 112. Accordingly, a step 1199 is formed between the reference passage 1180 and the large diameter portion 1190.

  When fixing the arbor 5 to the second work support unit 21, first, as shown in FIG. 19, the piston 1191 is driven to push the push-pull rod 113 upward. As a result, the engaging portion 708 and the rod 707 are pressed upward, and the accommodating portion 702 moves upward against the spring 703. As a result, the wall of the accommodating portion 702 does not receive a pressing force from the inner wall surface of the accommodating space 701, so that the wall of the accommodating portion 702 is not reduced in diameter and can enter the closed portion 512 of the arbor 5. At this time, the through-hole 710 of the fixing member 709 is at a position facing the large-diameter portion 1190, and the sphere 711 accommodated in the through-hole 710 protrudes radially outward toward the large-diameter portion 1190. .

  Subsequently, as shown in FIG. 20, after the closing portion 512 of the arbor 5 is accommodated in the accommodating portion 702, the driving of the piston 1191 is released and the push-pull rod 113 is moved downward. Accordingly, since the fixing member 709 also moves downward, the through hole 710 of the fixing member 709 moves from a position facing the large diameter portion 1190 to a position facing the reference passage 1180. Therefore, the ball 711 of the through hole 710 moves inward in the radial direction and protrudes into the internal space of the fixing member 709. As a result, the ball 711 moves downward together with the fixing member 709 while engaging with the engaging portion 708, so that the engaging portion 708, the rod 707, and the accommodating portion 702 are pulled downward. Therefore, the wall of the accommodating portion 702 is pressed by the taper of the inner wall surface of the accommodating space 701 and moves radially inward. Thus, the wall of the accommodating portion 702 presses the closing portion 512 of the arbor 5 and the arbor 5 is fixed.

  On the other hand, when removing the arbor 5, the push-pull rod 113 is pushed upward. As a result, the fixing member 709 is also pushed upward, so that the through hole 710 of the fixing member 709 is positioned at the large diameter portion 1190. Therefore, the sphere 711 moves outward in the radial direction, and the engagement between the sphere 711 and the engaging portion 708 is released. As a result, the engaging portion 708, the rod 707, and the housing portion 702 are biased upward by the spring 703, so that the inner wall surface of the housing space 701 releases the pressure on the wall of the housing portion 702, and the arbor 5 is The work support unit 21 can be removed.

  Returning to FIG. 1, the tool unit 22 will be described. The tool unit 22 includes a column 221 disposed on the base portion 4, and a saddle 222 that approaches and separates from the column 221 with respect to the second work support unit 21. The grindstone 10 is rotatably supported at the tip of the saddle 222. Although not shown, the tool unit 22 is provided with a drive source such as a motor for rotating the grindstone 10. The grindstone 10 is formed in a cylindrical shape, and a screw is formed on the surface thereof. Then, the screw meshes with the teeth of the workpiece W, and the grindstone 10 and the workpiece W are rotated synchronously, whereby the workpiece W is ground.

  Next, the operation of the gear machining apparatus configured as described above will be described with reference to FIG. First, the arbor 5 is mounted on the first workpiece support unit 11 of the workpiece machining position detection unit 1 and the second workpiece support unit 21 of the workpiece machining unit 2. At this time, the rotation support portion 34 of the transport unit 3 is lowered, and the arm control unit 37 is driven to open each holding arm 351 provided on the rotation support portion 34. That is, each clamping arm 351 is separated from the arbor 5.

  Here, in the first work support unit 11, the four fixing portions 1113 are driven to rotate the arm 1116 onto the flange 514 of the arbor 5. Thereby, the arbor 5 is fixed and the upward movement is restricted. Further, in the state of FIG. 6 in which the arbor 5 is attached, since the engaging portion 535, the operation portion 534, and the pressing member 53 of the arbor 5 are pulled downward, the movable member 52 moves downward. Therefore, the deformable member 56 at the tip of the arbor 5 has a reduced diameter, and the workpiece W can be attached. In this state, after the workpiece W is fitted into the deformable member 56, the hydraulic cylinder 119 is driven to move the piston 1191 upward. As a result, the push-pull rod 113 moves upward, and the pressing member 53 presses the movable member 52 upward as shown in FIG. As a result, the deformable member 56 is pressed by the hydraulic oil and expands in diameter. Thus, the workpiece W is pressed by the deformation member 56 and fixed to the arbor 5.

  Next, the detection unit is brought into contact with the tooth surface of the workpiece W, and the rotational position (phase) of the workpiece W is determined. This rotational position is transmitted to the control unit. Subsequently, the workpiece suspension unit 12 is driven, and the moving body 122 is lowered until the cap member 1232 contacts the workpiece W. When the cap member 1232 comes into contact with the workpiece W, the shock is absorbed by the damper 1223. Thus, the workpiece W and the moving body 122 come into contact with each other, and positioning of both is completed. Subsequently, the air cylinder 1224 of the moving body 122 is driven to bring both sandwiching arms 1229 close to each other. As a result, the workpiece W is clamped by the clamping arm 1229.

  Subsequently, the hydraulic cylinder 119 below the rotation support member 112 is driven to move the push-pull rod 113 downward, thereby reducing the diameter of the deformation member 56. Thereby, the workpiece W can be detached from the arbor 5. Subsequently, the workpiece suspension unit 12 is driven, and the movable body 122 in a state where the workpiece W is clamped is raised. That is, the workpiece W is separated from the arbor 5. At this time, the workpiece W rises together with the moving body 122 without rotating. In this state, the fixing portion 1113 is driven to move the arm 1116 away from the arbor 5. Subsequently, the built-in motor 116 is driven to rotate the rotation support member 112 together with the arbor 5 to a predetermined rotation position. The rotational position of the arbor 5 is a rotational position that has a predetermined phase difference determined in advance from the rotational position of the workpiece W described above.

  Following this, the fixing portion 1113 is driven to engage the flange 514 of the arbor 5 with the arm 1116. Then, the workpiece suspension unit 12 is driven, the moving body 122 is lowered, and the workpiece W is mounted on the arbor 5. In this state, both clamping arms 1229 are opened, and the workpiece W and the clamping arms 1229 are separated from each other. Next, the workpiece W is fixed to the arbor 5 by raising the push-pull rod 113 and expanding the diameter of the deformation member 56. In the above process, the workpiece W is not rotated until the workpiece W is removed from the arbor 5 and mounted again after the rotation position is detected by the detector. Therefore, the phase difference between the workpiece W and the arbor 5 is set to a predetermined value as described above.

  Next, the arbor 5 in which the rotation position is set in this way is conveyed to the workpiece machining unit 2. First, the fixing portion 1113 is driven to move the arm 1116 away from the arbor 5. At this time, since the arbor 5 is in the state shown in FIG. 7, it can be detached from the first work support unit 11. Then, the arm control unit 37 is driven, and the arbor 5 is clamped by both clamping arms 351. Subsequently, as shown in FIG. 21, after the main shaft member 32 of the transport unit 3 is raised, the rotation support unit is rotated 180 degrees. Thereby, the arbor 5 arranged in the workpiece machining position detection unit 1 is conveyed to the workpiece machining unit 2. On the other hand, the arbor 5 arranged in the workpiece machining unit 2 is arranged in the workpiece machining position detection unit 1. That is, the positions of the two arbors 5 are interchanged. Next, the first work support unit 11 is set to the state shown in FIG. 7, the second work support unit 21 is set to the state shown in FIG. 19, and the spindle member 32 is lowered. Thereby, each arbor 5 is attached to each work support unit 11, 21. Then, the 1st workpiece support unit 11 is made into the state of FIG. 6, and the 2nd workpiece support unit 21 is made into the state of FIG. 20, and the arbor 5 is fixed. In the process so far, since the diameter of the deformable member 56 is constantly increased, the workpiece W is fixed in the arbor 5 without changing the rotational position.

  Next, the operation in the workpiece machining unit 2 will be described. First, the arm control unit 37 is driven, and both sandwiching arms 351 are separated from the arbor 5. Then, the rotation support member 112 is rotated together with the arbor 5, and at the same time, the grindstone 10 is also rotated. As described above, since the phase difference between the workpiece W and the arbor 5 is set to a predetermined value, the arbor 5 and the workpiece W and the grindstone 10 rotate synchronously based on this phase difference. Following this, when the grindstone 10 is pressed against the workpiece W, the workpiece W is ground while both rotate synchronously.

  On the other hand, as described above, the rotation position is set for the arbor 5 arranged in the workpiece machining position detection unit 1. That is, while the workpiece machining unit 2 is machining the workpiece W, the rotational position is set for the arbor 5 arranged in the workpiece machining position detection unit 1 to prepare for the next machining. . Thereby, the work efficiency of the workpiece W can be improved. Thereafter, by repeating the above operation, a plurality of workpieces W can be processed efficiently.

  As described above, according to the present embodiment, after the rotation position of the workpiece W is detected by the detection unit, the workpiece W is separated from the support member without changing the rotation position. Then, the arbor 5 is rotated to a rotation position having a predetermined phase difference from the rotation position of the workpiece W detected by the detection unit. Therefore, when the workpiece W is mounted on the arbor 5 again, the phase difference between the rotational positions of the arbor 5 and the workpiece W is set in advance. Therefore, the phase difference between the workpiece W and the arbor 5 is always constant no matter what rotational position the workpiece W is mounted on the support member. As a result, when the arbor 5 on which the workpiece W is mounted with this phase difference is transported to the second workpiece support unit 21, it is not necessary to transmit information regarding the rotational position of the workpiece W. That is, since the phase difference between the workpiece W and the arbor 5 is set in advance, the workpiece W and the grindstone 100 are synchronously rotated based on the phase difference without individually obtaining information at the machining position. Can be processed. Therefore, it is possible to process the workpiece W without transmitting information between the first workpiece support unit 11 and the second workpiece support unit 21.

  Further, in the arbor 5 according to the present embodiment, since the workpiece W is pressed and fixed by the deformation member 56 that is deformed by hydraulic pressure, the workpiece W having a small diameter can be fixed. That is, since the arbor 5 has a simple configuration in which the through holes 571 and 572 and the communication hole 575 are formed inside and the cylindrical deformable member 56 is attached, the outer diameter can be reduced. On the other hand, for example, when trying to fix a workpiece with a so-called collet chuck, the collet chuck has a large number of parts, so the outer diameter cannot be reduced. Therefore, the work W having a small diameter can be fixed by adopting the configuration as in the present embodiment.

  In addition, since the arbor 5 has a configuration in which the movable member 52 is constantly pressed by the pressing member 53, once the workpiece W is attached to the arbor 5, the workpiece W is not moved unless the pressing member 53 is pulled. Keep fixing. Therefore, during the exchange of the arbor 5 between the first work support unit 11 and the second work support unit 21, the rotational position of the work W once attached to the arbor 5 does not change. Therefore, the workpiece W and the grindstone 100 can be rotated synchronously as described above.

  As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible unless it deviates from the meaning.

  For example, in the above embodiment, the case where the present invention is applied to gear grinding has been described, but it is needless to say that it can be used for gear shaving and honing. That is, the present invention can be applied to all gear processing apparatuses that perform processing while synchronously rotating a tool and a workpiece.

  The first through hole 571 and the second through hole 572 of the arbor 5 may have the same diameter. The shape of each of the through holes 571 and 572 and the communication hole 575 is not particularly limited as long as the hydraulic oil can be pressed by the movement of the movable member. Moreover, the movable member 52 and the pressing member 53 may be integrally formed.

  The arbor 5 can also fix a workpiece other than the gear. Further, the present invention can be applied to devices other than the gear processing device as described above, and even if the arbor is moved, it is required that the rotational position of the workpiece (fixed object) once attached is not changed. It can use suitably for a use.

DESCRIPTION OF SYMBOLS 1 Work processing position detection part 2 Work processing part 3 Conveyance part 5 Arbor 56 Deformation member 52 Movable member 53 Press member 571 1st through-hole (1st channel | path)
572 Second through hole (first passage)
574 Concave portion 575 Communication hole (second passage)
10 Grinding wheel 11 First work support unit 12 Work suspension unit (work movement unit)
21 Second work support unit 22 Tool unit

Claims (6)

A workpiece support for detachably fixing a work gear,
A support body having a cylindrical support surface, wherein a recess is formed over the entire circumference of the support surface, the first passage extends in the axial direction of the support surface, and the support surface communicates with the first passage. A support body having at least one second passage that opens in the concave portion formed therein,
A cylindrical deformable member, which is attached so as to liquid-tightly seal the concave portion on the support surface, and the work gear is attached to an outer peripheral surface;
A movable member movable in the first passage;
A pressing member that presses the movable member in a first direction for reducing the volume of the first passage;
Biasing means for constantly biasing the pressing member in the first direction;
With
A workpiece support, wherein the recess, the first passage, and the second passage are filled with a working fluid. The pressing member includes a first part and a second part,
The support body includes an accommodation space that communicates with the first passage and accommodates the first portion of the pressing member and the biasing means,
The work support tool according to claim 1, wherein the second portion of the pressing member protrudes outward from the support body. The work support according to claim 1 or 2,
A first work support unit for removably supporting the work support and rotating the work support;
A workpiece moving unit that attaches and detaches the workpiece gear to the workpiece support without changing the rotational position of the workpiece gear;
A detection unit for detecting a rotational position of the workpiece gear supported by the workpiece support in a state where the workpiece support is supported by the first workpiece support unit;
While the workpiece gear is being detached from the workpiece support by the workpiece moving unit, the workpiece support is moved to a rotation position having a predetermined phase difference from the rotation position of the workpiece gear detected by the detection unit. A control unit for controlling the workpiece support unit to rotate the tool;
A workpiece transfer unit that moves the workpiece support from the workpiece support unit to a machining position;
A second work support unit that is disposed at the processing position, removably supports the work support, and rotates the work support;
A tool unit having a tool for processing the gear to be processed while rotating while meshing with the gear to be processed supported by the second workpiece support unit;
With
The gear machining apparatus, wherein the work support and the tool are controlled by the control unit so as to rotate synchronously based on the predetermined phase difference. Each of the first and second work support units supports the work support,
The gear processing apparatus according to claim 3, wherein the workpiece transfer unit is configured to be able to exchange the workpiece support supported by the first and second workpiece support units. The first work support unit includes:
A rotating member that detachably supports the workpiece support;
A support for rotatably supporting the rotating member;
A drive unit for rotating the rotating member;
Tension means capable of pulling the pressing member of the work support tool in a second direction opposite to the first direction;
With
The said control part controls the said drive part so that the said rotation member may be rotated to the rotation position used as the predetermined phase difference with the rotation position of the said to-be-processed gear detected by the said detection part. Or the gear processing apparatus of 4. The second work support unit includes:
A rotating member that detachably supports the workpiece support;
A support for rotatably supporting the rotating member;
A drive unit for rotating the rotating member;
The gear processing apparatus according to any one of claims 3 to 5, further comprising: