WO2012114576A1 - Superfinishing machine used for both inner and outer rings - Google Patents

Abstract

In order to make it possible to automatically superfinish an inner ring and an outer ring by one piece of equipment and fully automatically perform switching between a set for superfinishing the inner ring and a set for superfinishing the outer ring, a superfinishing machine used for both inner and outer rings comprises a bearing ring holding mechanism (6) for rotatably holding bearing rings (2, 4), and a raceway surface processing mechanism (8) for superfinishing raceway surfaces (2s, 4s) of the bearing rings. The bearing ring holding mechanism is provided with a structure moving means for moving bearing ring-equipped structures (10) toward or away from a rotation axis (Ax) according to the type of a bearing ring to be processed. The raceway surface processing mechanism is provided with raceway surface whetstone holders (Ha, Hb) for supporting both inner and outer ring raceway surface whetstones (8a, 8b), and a holder moving/turning means (28) for moving and turning the raceway surface whetstone holders, and when an object to be processed is the inner ring, presses the inner ring raceway surface whetstone against an inner ring raceway surface, and when the object to be processed is the outer ring, presses the outer ring raceway surface whetstone against an outer ring raceway surface, at which time the inner and outer ring raceway surface whetstones traverse while being oscillated.

Description

Super finishing board for both inner and outer rings

The present invention enables a superfinishing process for the inner ring and the outer ring to be automatically performed with a single (one) facility, so that a set (specification) for the superfinishing process for the inner ring and a superfinishing process for the outer ring are performed. The present invention relates to a super finishing board for both inner and outer rings that can be switched automatically (ie, alternate machining of inner and outer rings) with a set (specification) for the purpose.

Conventionally, in the process of manufacturing bearing rings (inner rings, outer rings), each of the inner ring and outer ring raceway surfaces (ie, inner ring raceway surfaces) is provided for the purpose of improving wear resistance and corrosion resistance and improving rotational accuracy and acoustic performance. , The outer ring raceway surface) is smoothed (that is, flat and smooth) (see, for example, Patent Document 1). In this case, the equipment for superfinishing is built separately for the inner ring raceway surface and the outer ring raceway surface independently, and what are the superfinishing process for the inner ring raceway surface and the superfinishing process for the outer ring raceway surface? It is done separately in each dedicated facility.

Japanese Unexamined Patent Publication No. 2007-260830

However, with the conventional super finishing technology, a super finishing machine dedicated to the inner ring raceway surface and a super finishing machine dedicated to the outer ring raceway surface are required independently of each other. In addition, the capital investment cost and the power consumption increase, and there are certain limits to cost reduction, space saving, and energy saving.

Furthermore, for each of the super finishing machines dedicated to the inner ring raceway surface and the outer ring raceway surface, for example, the positioning work of the holding member for holding the inner ring and the outer ring, and the super finishing grindstone for the inner ring raceway surface and the outer ring raceway surface Positioning operations and the like must be performed individually, and the labor and time required for super-finishing processing are required. Therefore, there is a certain limit to improving the work efficiency of super-finishing processing. In particular, in a production line that requires a large variety of small lots, the above-mentioned operations must be repeated frequently, and the operation rate of super finishing is reduced.

The present invention has been made to solve such a problem, and the object of the present invention is to automatically perform superfinishing processing on the inner ring and the outer ring with a single (one unit) facility, thereby enabling the inner ring and the outer ring to be automatically processed. Super-finishing for inner and outer rings that enables full-automatic switching between the set (specification) for super-finishing and the set (specification) for super-finishing for the outer ring (ie, alternate machining of inner and outer rings) To provide a finishing board.

In order to achieve such an object, one aspect of the present invention is an inner / outer ring super-finishing machine that automatically performs super-finishing processing on an inner ring and an outer ring with a single facility, and is centered on a rotating shaft. A bearing ring holding mechanism that rotatably holds the bearing ring, and a raceway surface machining mechanism that superfinishes the raceway surface of the bearing ring that is rotatably held. The plurality of bearing ring mounting structures that are concentrically arranged at predetermined intervals along the circumferential direction and that can mount the bearing ring, and the plurality of the ring according to the type of the bearing ring to be processed A structure moving means that enables the structure for mounting the bearing ring to be radially approached toward the rotation axis at the same time and to be radially separated from the rotation axis, and the raceway surface machining mechanism includes an inner ring raceway surface. Supports both the grinding wheel for outer ring and the outer ring raceway surface Road surface grindstone holder, holder moving swiveling means capable of moving the grindstone surface grindstone holder in a desired direction and swiveling to a desired angle, and a trajectory to be processed When the ring is an inner ring, when the inner ring raceway surface is superfinished, the inner ring raceway surface is pressed against the inner ring raceway surface, and when the raceway to be machined is an outer ring, the outer ring raceway surface is superfinished. An inner / outer ring superfinishing board comprising a grinding wheel pressing means that enables the outer ring raceway surface to be pressed against the outer ring raceway surface.
In the bearing ring holding mechanism, each of the plurality of bearing ring mounting structures is provided with mounting surfaces on which the bearing rings can be mounted on the same plane perpendicular to each other, and The bearing ring holding mechanism is provided with a pressure contact structure that presses the bearing ring against each mounting surface, and the bearing ring is pressed against each mounting surface by the pressure welding structure, so that the bearing ring is the structure for mounting the bearing ring. You may comprise so that it can rotate integrally with a body.
A pair of positioning mechanisms are provided on both sides of the bearing ring holding mechanism so as to face each other along the direction orthogonal to the rotation axis and adjust the positions of the bearing rings mounted on the plurality of bearing ring mounting structures. Each of the pair of positioning mechanisms includes a shoe that is also used as a configuration for supporting the outer diameter surface of the raceway during superfinishing, a raceway positioning pusher that presses the raceway toward the shoe, and the shoe. And a positioning mechanism moving means that enables the positioning pusher to approach and move away from the raceway, and when the raceway to be processed is an inner ring, one shoe and a positioning pusher Is moved away from the inner ring, the other shoe and the positioning pusher are approached toward the inner ring, and the other positioning pusher applies the inner ring to the other shoe. Positioning the inner ring, and when the raceway to be processed is an outer ring, the other shoe and positioning pusher are separated from the outer ring, and one shoe and positioning pusher are moved closer to the outer ring, You may comprise so that an outer ring may be positioned by abutting an outer ring | wheel on one shoe | hook with a positioning pusher.
The raceway surface grindstone holder comprises an inner ring raceway surface grindstone holder that supports an inner ring raceway surface grindstone, and an outer ring raceway surface grindstone holder that supports an outer ring raceway surface grindstone, and the grindstone pressing means includes a cylinder, A piston main body provided in the cylinder; and two piston rods extending from both sides of the piston main body to the outside of the cylinder. One of the two piston rods is connected to the inner ring raceway surface grindstone holder, An outer ring raceway surface grindstone holder may be coupled to the outer ring raceway surface.
The inner / outer ring superfinishing board supports a collar part machining head that supports a collar part grindstone, and supports the collar part machining head in a reversible manner, and the collar part grindstone around a reversal axis thereof at a desired angle. A reversing mechanism for reversing, and an operating device for supporting the reversing mechanism and rotating the collar part processing head in a desired direction together with the reversing mechanism and performing a slight reciprocating motion may be further provided.
The actuating device has a rotary shaft that can be rotated by a drive source, and converts the rotary motion of the rotary shaft into a reciprocating motion and transmits it to the reversing mechanism, whereby the collar portion grindstone of the collar portion machining head. An oscillation mechanism that reciprocally moves the collar, and a pivot mechanism that is concentric with the rotation shaft and pivots the flange grinding wheel of the collar processing head to a desired angle by pivoting the reversing mechanism. May be.
The oscillation mechanism includes an eccentric shaft portion provided on a rotation shaft, and an oscillation portion attached to the eccentric shaft portion so as to be rotatable relative to the eccentric shaft portion and supporting the reversing mechanism. Is rotated into a reciprocating motion from the eccentric shaft portion through the oscillation portion and transmitted to the reversing mechanism, whereby the collar portion grindstone of the collar portion machining head is slightly reciprocated. It may be configured to exercise.
The turning mechanism is concentrically rotatable with the rotation shaft of the oscillation mechanism, and is connected to the angle adjustment gear shaft portion configured as a separate shaft from the rotation shaft, and the angle adjustment gear shaft portion, An angle adjustment table that rotates the oscillation part to a desired angle, and when the angle adjustment gear shaft part is rotated, the rotational movement is transmitted from the angle adjustment table to the oscillation part, and the angle It is good also as a structure which turns the said collar part processing head to a desired angle with the said inversion mechanism by rotating the said oscillation part with an adjustment table.

According to the present invention, the super finishing for the inner ring and the outer ring can be automatically performed with a single (one) facility, so that the set (specification) for super finishing for the inner ring and the super finishing for the outer ring can be performed. It is possible to realize an inner / outer ring super-finishing panel that can be switched automatically (ie, alternate processing of inner and outer rings) with a set (specification) for finishing.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view schematically showing an overall configuration of an inner / outer ring super finishing board according to an embodiment of the present invention, wherein (a) is a diagram showing a set state of super finishing for an inner ring, and (b) is The figure which shows the set state of the super-finishing process with respect to an outer ring | wheel. (a) is a plan view showing the configuration of the inner / outer ring combined raceway holding mechanism, and (b) is a longitudinal sectional view of the inner / outer ring combined raceway holding mechanism shown in FIG. (a) is a partially enlarged perspective view showing a state in which superfinishing is being performed on the (single row) raceway surface of the conical inner ring, and (b) is a diagram showing a state where the (single row) raceway surface of the cone outer ring is superposed. The perspective view which partially enlarges and shows the state in which finishing is performed. (a) is a partial cross-sectional view showing a configuration of a pressure head for both inner and outer rings provided with an inner ring raceway surface grindstone and an outer ring raceway surface grindstone, and (b) is a diagram showing a conical inner ring (single row) with an inner ring raceway surface grindstone. ) The figure which shows the state where superfinishing is done to the raceway surface, (c) is the figure which shows the state where superfinishing is done to the (single row) raceway surface of the conical outer ring with the grindstone for outer ring raceway surface . (a) is a figure which shows the state in which superfinishing is performed on the (single row, double row) raceway surface of the cylindrical inner ring by the inner ring raceway surface grinding wheel, and (b) is the cylindrical inner ring by the inner ring raceway surface grinding wheel. The figure which shows the state in which superfinishing is performed on the (double row) raceway surface, (c) is the superfinishing being performed on the (double row) raceway surface of the conical inner ring by the inner ring raceway surface grinding wheel The figure which shows a state, (d) is a figure which shows the state in which superfinishing is performed to the (single row) raceway surface of a cylindrical outer ring with the outer ring raceway surface grindstone, (e) is the outer ring raceway surface grindstone The figure which shows the state where superfinishing is performed on the (single row, double row) raceway surface of the cylindrical outer ring, (f) is superfinishing on the (double row) raceway surface of the cylindrical outer ring with the grinding wheel for outer ring raceway surface (G) shows a state where the superfinishing is performed on the (double row) raceway surface of the conical outer ring by the outer ring raceway surface grinding wheel. It shows the that state. (a) is a partially enlarged view showing a state in which the inner ring collar is being superfinished by the collar superfinishing processing unit, and (b) is a superfinishing process on the inner ring raceway surface and the inner ring collar simultaneously. The figure which expands and shows the state in which the process is performed partially expanded. (a) is a plan view showing a structure for mounting a brim superfinishing processing unit, (b) is a cross-sectional view taken along the line bb of FIG. (a), and (c) is a diagram (b) of FIG. Sectional drawing which follows the cc line | wire. (a) is a diagram showing a state in which superfinishing is performed on the middle collar portion of the (double row) conical inner ring, and (b) is a diagram showing one side collar portion of the (single row, double row) cylindrical inner race. The figure which shows the state in which finishing is performed, (c) is the figure which shows the state in which superfinishing is performed to the other side collar part of the (single row, double row) cylindrical inner ring | wheel.

In the super finishing panel for both inner and outer rings of the present invention, the super finishing process for the inner ring and the outer ring can be automatically performed by a single (one unit) equipment, so that the set (specification for super finishing process for the inner ring can be performed. ) And a set (specification) for super-finishing processing for the outer ring (ie, alternate processing of the inner and outer rings) is realized in a fully automatic manner. In the following, for the sake of simplicity, a set (specification) for super finishing for the inner ring is referred to as “inner ring set”, and a set (specification) for the super finishing for the outer ring is referred to as “outer ring set”.

In order to realize such a technique, the superfinishing board for both inner and outer rings according to an embodiment of the present invention is shown in FIGS. 1 (a) and 1 (b). The inner ring raceway surface 2s and the outer ring raceway surface 4s) are smoothed as much as possible (for example, the ground raceway surface is further flattened and smoothed). A collar part superfinishing processing unit U2 for performing superfinishing to smooth the collar part (surface) 2t of the inner ring 2 with collar as much as possible (for example, to make the grounded collar part (surface) flat and smooth); It is configured with.

Hereinafter, the inner / outer ring combined super finishing panel of this embodiment will be described. In the description, “inner / outer ring combined raceway surface finishing unit U1” will be described with reference to FIGS. The part super finishing processing unit U2 "will be described with reference to FIGS. 1 and 6 to 8. FIG. Here, as an example, a flanged inner ring 2 and a flangeless outer ring 4 for single-row tapered roller bearings are applied, and the inner ring raceway surface 2s, the outer ring raceway surface 4s, and the inner ring raceway surface 2s extend. A case is assumed in which superfinishing is performed on the collar portion (surface) 2t.

"Inner and outer ring combined raceway surface finishing unit U1"
As shown in FIGS. 1 (a) and 1 (b), the inner / outer ring combined raceway surface finishing unit U1 can rotate the bearing rings (inner ring 2, outer ring 4) about the rotation axis Ax (for example, an arrow K). The bearing ring holding mechanism 6 that is held in a rotating manner) and the raceway surfaces (the inner ring raceway surface 2s and the outer ring raceway surface 4s) of the bearing rings 2 and 4 that are rotatably held by the bearing ring holding mechanism 6 are superfinished. And a raceway surface machining mechanism 8 (see FIG. 3). 1A shows only the inner ring raceway surface grindstone 8a supported by the raceway surface machining mechanism 8, and FIG. 1B shows the outer ring raceway surface supported by the raceway surface machining mechanism 8. Only the grindstone 8b is shown.

As shown in FIGS. 2 (a) and 2 (b), the bearing ring holding mechanisms 6 are arranged concentrically with the rotation axis Ax along the circumferential direction at predetermined intervals (for example, at equal intervals), and A plurality of bearing ring mounting structures 10 (also referred to as nosepieces) on which the bearing rings (inner ring 2, outer ring 4) can be mounted, and a plurality of bearing ring mounting structures according to the type of the bearing ring to be processed. (Nosepiece) 10 is provided with structure moving means that allows the nosepiece 10 to simultaneously approach the rotation axis Ax in the radial direction (arrow S direction) and to be separated from the rotation axis Ax in the radial direction (arrow S direction). ing.

Note that the type of raceway refers to a concept classified by “model number” or “part number” assigned to the inner ring 2 and the outer ring 4, and by referring to such model number, part number, etc., for example, , Size of inner ring 2 and outer ring 4 (diameter, radius, inner diameter, outer diameter, width, thickness, etc.) and form of raceway surface of inner ring 2 and outer ring 4 (single row, double row, inclination angle, width, surface) Shape), or the presence or absence of a collar portion (surface) 2t can be specified. The model number, product number, etc. can be used as input data for positioning control (stop position control) by a servo motor, which will be described later.

In the bearing ring holding mechanism 6, the mounting surfaces 10 s on which the bearing rings (the inner ring 2 and the outer ring 4) can be mounted on the plurality of bearing ring mounting structures (nosepieces) 10, respectively, perpendicular to the rotation axis Ax. They are provided on the same plane. The size, shape, and number of arrangements of each bearing ring mounting structure (nosepiece) 10 are, for example, the purpose and environment of use of the super finishing panel for both inner and outer rings, or the structure for mounting the bearing ring (nosepiece). ) Since it is set according to the size, weight, etc. of the bearing rings (inner ring 2, outer ring 4) mounted on 10, there is no particular limitation here.

Further, the bearing ring mounting structure (nosepiece) 10 and the structure moving means described above are constructed on a turntable 12 constituting one structure of the bearing ring holding mechanism 6, and the turntable 12 is controlled by a control (not shown). By a rotational force from a belt or a motor that is driven and controlled by the system, the belt can be rotated in the direction of the arrow K, for example, about the rotation axis Ax. The rotation start timing, rotation speed, and rotation direction of the turntable 12 are managed by a control system, and thereby, for example, a bearing ring (inner ring 2, outer ring) by a positioning mechanism and a pressure contact structure 26 (see FIG. 3A) described later. After 4) is positioned and pressed against the mounting surface 10s, the turntable 12 can be automatically rotated at a predetermined timing.

Further, the structure moving means can be realized by a combination of a ball screw and a servo motor. Here, as an example of the structure moving means, a plurality of ball screws (between the screw shaft 14 and the nut 16) arranged radially along the moving direction S of the plurality of bearing ring mounting structures (nosepieces) 10. A structure in which the ball rolls and rotates), a rotation mechanism that rotates each screw shaft 14 simultaneously and in the same direction, and a servo motor (not shown) that rotates the rotation mechanism. The servo motor includes, for example, an AC servo motor and a DC servo motor. Here, an AC servo motor is applied as an example.

The plurality of ball screws are rotatably supported one by one in the plurality of ball screw accommodating portions 18 extending along the radial direction S about the rotation axis Ax on the turntable 12. One nut 16 is screwed onto the screw shaft 14. In addition, each ball screw accommodating portion 18 is formed with a key groove 18g perforated along the radial direction S (that is, the moving direction S of each bearing ring mounting structure (nosepiece) 10) on the upper surface thereof. Each bearing ring mounting structure (nosepiece) 10 and each nut 16 are coupled (coupled) to each other by a bolt 20 passed through the keyway 18g.

In addition, the rotation mechanism includes a single main bevel gear 22 that is provided coaxially with the rotation axis Ax, and a plurality of one provided at the distal end portion of each screw shaft 14 near the rotation axis Ax. It has a sub bevel gear 24, and both bevel gears 22, 24 mesh with each other at right angles. The main bevel gear 22 is rotationally controlled by an AC servomotor (not shown).

In this case, the rotational force of the AC servomotor is transmitted from the main bevel gear 22 to each screw shaft 14 via each sub-bevel gear 24, and when each screw shaft 14 rotates simultaneously, each nut 16 thereby causes each screw 16 to rotate. By simultaneously moving along the shaft 14, a plurality of bearing ring mounting structures (nosepieces) 10 can be moved simultaneously and in the same direction along the arrow S direction.

Here, in the stop position control of a plurality of bearing ring mounting structures (nosepieces) 10, “model number”, “product number”, etc. assigned to each of the inner ring 2 and the outer ring 4 are input to a control device (not shown). While detecting the rotational position and rotational speed of the output shaft of the AC servo motor by an encoder (rotation detector) (not shown), the present position (coordinate) signal is compared with the target position (coordinate) signal to perform feedback control (position Control and speed control).

At this time, if there is a difference between the current position (coordinate) signal and the target position (coordinate) signal, the AC servo motor is operated (rotated) in a direction to reduce the difference from the target position (coordinate). Then, this procedure is repeated until the target value is finally reached or the allowable range is entered, whereby stop position control of the plurality of track ring mounting structures (nosepieces) 10 is performed. Another method is to record the current position information of the AC servomotor digitally, give a difference to the target position (coordinate) signal, and reach the target value at once.

In this case, assuming that, for example, superfinishing is alternately performed on the inner ring 2 and the outer ring 4 such as a specific “model number” and “product number”, a plurality of bearing ring mounting structures (nosepieces) 10 are provided. The stop positions are limited to two locations: a first position (coordinates) that holds the inner ring 2 and a second position (coordinates) that holds the outer ring 4. For this reason, by operating (rotating) the AC servo motor so as to eliminate the difference between the first position signal (coordinates) and the second position signal (coordinates), a plurality of structures for mounting a bearing ring (nosepiece) 10 can be automatically switched between the first position (coordinates) “inner ring set” and the second position (coordinates) “outer ring set”. Hereinafter, this is referred to as “nosepiece inner / outer ring set switching”.

As shown in FIG. 3A, the above-described bearing ring holding mechanism 6 includes the bearing rings (inner ring 2 and outer ring 4) and mounting surfaces 10s of the plurality of bearing ring mounting structures (nosepieces) 10 described above. A pressure contact structure 26 is provided for pressure contact (see FIG. 2). As the form of the pressure contact structure 26, for example, the race rings (inner ring 2 and outer ring 4) are pressed against each bearing ring mounting structure (nosepiece) 10 so as to be pressed against each mounting surface 10s. And a suction method in which the bearing rings (inner ring 2, outer ring 4) are attracted (sucked) toward each bearing ring mounting structure (nosepiece) 10 and pressed against each mounting surface 10 s. Can be applied.

FIG. 3A shows a state where a plurality of bearing ring mounting structures (nosepieces) 10 are set at positions where the inner ring 2 is held. Here, a pressing method is applied as an example of the press contact structure 26, and the press contact structure 26 (also referred to as a pressure roll mechanism) according to the press method is a hollow annular end surface 2a of the inner ring 2 (press contact with each mounting surface 10s). A pair of rolls 26r capable of applying a pressing force vertically downward with respect to the opposite end face of the inner ring raceway surface 2s (hereinafter referred to as the inner ring end face 2a). Yes.

The pair of rolls 26r are opposed to each other so as to be rotatable about a single virtual rotation axis (not shown), and are arranged in parallel to each other, of the inner ring end face 2a forming a hollow annular shape, The inner ring 2 is set at both diametrical both sides passing through the central axis of the inner ring 2. At the stage where the pair of rolls 26r are set on both sides of the inner ring end face 2a, the inner ring 2 is in an “inner ring set” state held by a plurality of track ring mounting structures (nosepieces) 10. In this case, the inner ring 2 is pressed toward the inner ring shoe 44 by “switching of inner and outer rings of the shoe and pusher” described later, and is set so as to be rotatable with reference to the inner ring shoe 44.

In order to realize such a set, the pressure contact structure 26 includes a pair of roll holders 26h that support each roll 26r so that the roll 26r can rotate (for example, rotate free). The pair of roll holders 26h extend in parallel with each other, and the rolls 26r are respectively supported at the tip portions thereof. Further, the base end portions of the pair of roll holders 26h are connected (supported) to a moving mechanism (not shown) for moving the roll holder 26h and setting the pair of rolls 26r on both side portions of the inner ring end surface 2a. ing.

The moving mechanism moves (relatively approaches) the pair of roll holders 26h in accordance with the diameter of the inner ring 2 in the “inner ring set” state (the inner diameter of the inner ring end surface 2a, the outer diameter, the average diameter of the inner and outer diameters, etc.). Or separated). Thereby, the distance (interval) between the pair of rolls 26r can be reduced or increased according to the diameter of the inner ring 2 (the inner diameter of the inner ring end surface 2a, the outer diameter, the average diameter of the inner and outer diameters, etc.). In addition, when moving a pair of roll holder 26h, it is preferable to move, maintaining a mutually parallel positional relationship.

Such a moving mechanism can be realized by a combination of a ball screw (a structure in which a ball rolls and rotates between a screw shaft and a nut) and an AC servo motor. Although not particularly illustrated, for example, the pair of roll holders 26h are individually connected to the screw shafts via nuts, and AC screw motors are connected to the screw shafts, and the rotations of the screw shafts are controlled by the AC servo motors. That's fine. In addition, it is preferable to set the attitude | position of arrangement | positioning of each screw shaft in the direction orthogonal to this in the middle position with respect to the parallel positional relationship of a pair of roll holder 26h. In another way of understanding, it is preferable that the orientation of the arrangement of each screw shaft is set to be parallel to one virtual rotation axis of the pair of rolls 26r described above. As a result, the pair of roll holders 26h are moved, and the distance (interval) between the pair of rolls 26r is adjusted to the diameter of the inner ring 2 (the inner diameter of the inner ring end surface 2a, the outer diameter, the average diameter of the inner and outer diameters, etc.). be able to.

Further, the moving mechanism is configured so that the width of the inner ring 2 in the “set for inner ring” state (the distance between the inner ring end faces, the other way of understanding, the mounting surface 10s of the bearing ring mounting structure (nosepiece) 10). To the inner ring end face 2a), the pair of roll holders 26h can be moved (up and down in a vertical type superfinishing board for inner and outer rings). Thereby, a pair of roll 26r can be made to approach or separate with respect to the inner ring | wheel 2 (inner ring end surface 2a). In addition, when moving a pair of roll holder 26h, it is preferable to move, maintaining a mutually parallel positional relationship.

Such a moving mechanism can be realized by a combination of a ball screw (a structure in which a ball rolls and rotates between a screw shaft and a nut) and an AC servo motor. Although not particularly illustrated, for example, the base end portions of the pair of roll holders 26h may be connected to a screw shaft extending in the vertical direction via a nut and the rotation of the screw shaft may be controlled by an AC servo motor. Thereby, a pair of roll holder 26h can be moved up and down, a pair of roll 26r can be approached to the inner ring | wheel 2, and can be positioned in the both-sides site | part of the inner ring | wheel end surface 2a.

In this case, in the moving mechanism described above, the process until the pair of rolls 26r are set on both sides of the inner ring end face 2a is performed after adjusting the distance (interval) between the pair of rolls 26r in accordance with the diameter of the inner ring 2. The roll 26r may be positioned at both side portions of the inner ring end surface 2a, and conversely, the pair of rolls 26r is positioned in the vicinity of both side portions of the inner ring end surface 2a (for example, near the inside of the both side portions). After positioning in the region or the region near the outside), the distance (interval) between the pair of rolls 26r may be adjusted in accordance with the diameter of the inner ring 2.

Regardless of which process is performed, in the subsequent procedure, a pressing force is applied to the inner ring end surface 2a vertically downward by the pair of rolls 26r set on both sides of the inner ring end surface 2a. . In order to execute such a procedure, the pressing structure 26 is provided with a pressing force applying mechanism. The pressing force applying mechanism may be any mechanism that can move the pair of rolls 26r vertically downward with respect to the inner ring end surface 2a.

For example, in the middle of the pair of roll holders 26h, the base end portions of the pair of roll holders 26h are vertically upward based on the “lever principle” using a screw shaft provided perpendicularly to the middle of the pair of roll holders 26h. , The tip end portions of the pair of roll holders 26h can be moved vertically downward about the fulcrum, and the pair of rolls 26r is moved vertically downward with respect to the inner ring end surface 2a. Can do. Thereby, the inner ring | wheel 2 can be press-contacted to each mounting surface 10s (refer FIG. 2) of the some structure (nosepiece) 10 for a bearing ring mounting.

Thus, the inner ring 2 is sandwiched between the pressure contact structure 26 and a plurality of bearing ring mounting structures (nosepieces) 10 by pressing the inner ring 2 to each mounting surface 10 s by the pressure contact structure 26. Thus, the inner ring 2 can be rotated integrally with each bearing ring mounting structure (nosepiece) 10. In the above description, the relationship between the pressure contact structure 26 and the inner ring 2 has been described, but the same applies to the outer ring 4 (see FIG. 3B). Rolls 26r are set on both sides of the outer ring end face 4a (see FIG. 3B), and thereby the outer ring 4 is brought into pressure contact with each mounting surface 10s of the plurality of bearing ring mounting structures (nosepieces) 10. Can do.

Here, when the pair of rolls 26r are set on both sides of the inner ring end surface 2a and the outer ring end surface 4a, the stop position control of the pair of roll holders 26h (in other words, the stop position control of the pair of rolls 26r) The “model number” and “product number” assigned to each of the inner ring 2 and the outer ring 4 are input to a control device (not shown), and the output shaft of each of the above AC servo motors by an encoder (rotation detector) not shown. The present position (coordinate) signal is compared with the target position (coordinate) signal, and feedback control (position control or speed control) is performed while detecting the rotational position and rotational speed of.

At this time, if there is a difference between the current position (coordinate) signal and the target position (coordinate) signal, the AC servo motor described above is operated (rotated) in a direction to reduce the difference from the target position (coordinate). Then, by repeating this procedure until the target value is finally reached or enters the allowable range, the stop position control of the pair of roll holders 26h is performed. As another method, the current position information of the AC servo motor described above is digitally recorded, and a difference to the target position (coordinate) signal is given to the current position information so that the target value is reached at once. Good.

In this case, assuming that, for example, superfinishing is alternately performed on the inner ring 2 and the outer ring 4 such as a specific “model number” and “product number”, the stop position of the pair of roll holders 26h is the pair of rolls 26r. The first position (coordinates) is set at both sides of the inner ring end face 2a, and the second position (coordinates) is set at a pair of rolls 26r at both sides of the outer ring end face 4a. For this reason, the AC servo motor is operated (rotated) so as to eliminate the difference between the first position signal (coordinates) and the second position signal (coordinates), so that the pair of rolls 26r can be moved to the first position (coordinates). ) It is possible to automatically switch between the “inner ring set” and the second position (coordinates) “outer ring set”. Hereinafter, this is referred to as “pressure roll inner / outer ring set switching”.

As shown in FIGS. 3 (a) and 3 (b), the raceway surfaces (inner ring raceway surface 2s, outer ring raceway surface 4s) of the race rings 2 and 4 rotatably held by the race ring holding mechanism 6 described above continue. Thus, superfinishing is performed by the raceway surface machining mechanism 8. In this case, the raceway surface machining mechanism 8 includes a raceway surface grindstone holder Ha, Hb that supports both the inner ring raceway surface grindstone 8a and the outer ring raceway surface grindstone 8b, and raceway surfaces (inner ring raceway surface 2s, outer ring raceway surface). In the super finishing for 4s), a holder moving turning means 28 capable of moving the raceway surface grindstone holders Ha, Hb in a desired direction and turning at a desired angle is provided.

In super finishing for the raceway surfaces (inner ring raceway surface 2s, outer ring raceway surface 4s), the inner ring 2 (or outer ring) integrated with each bearing ring mounting structure (nosepiece) 10 by the pair of rolls 26r described above. 4) is rotated in the predetermined direction K along with the rotation of the turntable 12, and the inner ring raceway surface grindstone 8a (or outer ring) is perpendicular to the inner ring raceway surface 2s (or outer ring raceway surface 4s). The inner ring raceway surface 2s (or the outer ring raceway surface 4s) while oscillating (slightly reciprocating) while pressing the raceway surface grindstone 8b) at a predetermined pressure Fa, Fb (see FIGS. 1A and 1B). The process of traversing along is performed.

In such super finishing, the inner ring raceway surface grindstone 8a (or the outer ring raceway surface grindstone 8b) is set at the superfinishing start position. Here, the superfinishing start position is a position where the inner ring raceway surface grindstone 8a (or outer ring raceway surface grindstone 8b) is positioned in the vertical direction with respect to the inner ring raceway surface 2s (or outer ring raceway surface 4s). Is assumed. In this case, the shape, inclination angle, width, etc. of the inner ring raceway surface 2s (or outer ring raceway surface 4s) are specified according to the “model number”, “product number”, etc. of the race rings (inner ring 2, outer ring 4). Therefore, the posture and position of the inner ring raceway surface grindstone 8a (or outer ring raceway surface grindstone 8b) with respect to the inner ring raceway surface 2s (or outer ring raceway surface 4s) must be adjusted accordingly.

The holder movement turning means 28 is provided with a configuration for performing such adjustment.
As an example, the holder moving turning means 28 is a movable body (not shown) that can move in the direction X across the inner ring 2 (or the outer ring 4) integrated with each track ring mounting structure (nosepiece) 10. ) And a rotary holder 30 that is rotatable in the θ direction and a slider 32 that is movable in the Z direction. In this case, the rotation axis (not shown) of the rotation holder 30 is set in a direction orthogonal to the rotation axis Ax of the above-described bearing ring holding mechanism 6 (the turntable 12). The slider 32 is mounted on the rotary holder 30, and the slide direction Z is set in a direction orthogonal to the rotation axis of the rotary holder 30.

The holder moving and turning means 28 can be realized by a combination of a ball screw (a structure in which a ball rolls and rotates between a screw shaft and a nut) and an AC servo motor. Although not specifically illustrated, for example, in the case of a moving body, the moving body is connected to a screw shaft arranged in the X direction via a nut, and an AC servo motor is connected to the screw shaft, and the screw shaft is rotated by the AC servo motor. Control is sufficient. In the case of the rotary holder 30, an AC servo motor may be connected to the rotary shaft, and the rotary shaft may be rotationally controlled by the AC servo motor. Further, in the case of the slider 32, the slider 32 may be connected to the screw shaft arranged in the Z direction via a nut, and an AC servo motor may be connected to the screw shaft, and the screw shaft may be rotationally controlled by the AC servo motor. .

In this case, in the holder moving and turning means 28 described above, the process until the inner ring raceway surface grindstone 8a (or the outer ring raceway surface grindstone 8b) is set to the superfinishing start position can be arbitrarily set. As an example, the inner ring in which the inner ring raceway surface grindstone 8a (or the outer ring raceway surface grindstone 8b) is integrated with each bearing ring mounting structure (nosepiece) 10 by moving the moving body in the X direction. 2 (or outer ring 4). Next, the rotary holder 30 is rotated by a predetermined angle in the θ direction. The rotation angle at this time is adjusted based on the inclination angle of the inner ring raceway surface 2s (or the outer ring raceway surface 4s). Subsequently, the slider 32 is slid in the Z direction so that the inner ring raceway surface grindstone 8a (or the outer ring raceway surface grindstone 8b) is disposed opposite to the inner ring raceway surface 2s (or outer ring raceway surface 4s).

Then, by repeating such a process until the target value is finally reached or enters an allowable range, the inner ring raceway surface grindstone 8a (or the outer ring raceway surface grindstone 8b) is set to the superfinishing start position. Can be set. In this case, in super finishing (oscillation, traverse), the directions of the pressures Fa and Fb (see FIGS. 1A and 1B) with respect to the inner ring raceway surface 2s (or outer ring raceway surface 4s) are the above-described tracks. The inner ring raceway surface grindstone 8a (or the outer ring raceway surface grindstone 8b) may be set at the superfinishing start position so as to coincide with the radial direction passing through the rotation axis Ax of the wheel holding mechanism 6 (the turntable 12). preferable.

Here, when the inner ring raceway surface grindstone 8a (or the outer ring raceway surface grindstone 8b) is set at the superfinishing start position, the stop position control of the holder moving turning means 28 (in other words, the inner ring raceway surface grindstone 8a). (Or, it is also referred to as stop position control of the outer ring raceway surface grindstone 8b), the “model number” or “part number” assigned to each of the inner ring 2 and the outer ring 4 is input to a control device (not shown) and illustrated. Feedback control by comparing the current position (coordinate) signal with the target position (coordinate) signal while detecting the rotational position and rotational speed of the output shaft of each AC servo motor by the encoder (rotation detector) (Position control and speed control) are performed.

At this time, if there is a difference between the current position (coordinate) signal and the target position (coordinate) signal, the AC servo motor described above is operated (rotated) in a direction to reduce the difference from the target position (coordinate). Then, by repeating this procedure until the target value is finally reached or enters the allowable range, the stop position control of the holder moving and turning means 28 is performed. As another method, the current position information of the AC servo motor described above is digitally recorded, and a difference to the target position (coordinate) signal is given to the current position information so that the target value is reached at once. Good.

In this case, assuming that, for example, superfinishing is alternately performed on the inner ring 2 and the outer ring 4 such as a specific “model number” and “product number”, the stop position of the holder moving swivel means 28 is the inner ring raceway surface 2s. In contrast, a first position (coordinates) for setting the inner ring raceway surface grindstone 8a at the superfinishing start position and a second position for setting the outer ring raceway surface grindstone 8b at the superfinishing start position with respect to the outer ring raceway surface 4s. It is limited to two locations (coordinates). For this reason, by operating (rotating) the AC servo motor so as to eliminate the difference between the first position signal (coordinates) and the second position signal (coordinates), the inner ring raceway surface grinding wheel with respect to the inner ring raceway surface 2s. The position “8a for setting the inner ring” (FIG. 3A) where the superfinishing start position 8a is set, and the position where the outer ring raceway surface grindstone 8b is set for the superfinishing starting position with respect to the outer ring raceway surface 4s. It is possible to automatically switch to the “outer ring set” (FIG. 3B). Hereinafter, this is referred to as “switching of the inner and outer ring sets at the super finishing machining start position”.

Subsequently, after the above-described super finishing processing start position set is completed, the inner ring raceway surface grindstone 8a (or the outer ring raceway surface grindstone 8b) from the direction perpendicular to the inner ring raceway surface 2s (or outer ring raceway surface 4s). Is pressed at predetermined pressures Fa and Fb (see FIGS. 1A and 1B). Such processing may be performed after the inner ring 2 (or outer ring 4) is rotated in a predetermined direction K as the turntable 12 rotates, or the inner ring 2 (or outer ring 4) is moved in a predetermined direction. It may be performed at the same time as rotating to K or before rotating.

In any case, in order to perform the pressing process described above, the end of the slider 32 is provided with a grindstone pressing means 34 (that is, a pressure head 34) that also serves as an inner / outer ring. In this case, the pressure head 34 holds the raceway surface grindstone holders Ha and Hb movably in a predetermined direction. Then, by moving the raceway surface grindstone holders Ha, Hb in a predetermined direction, the inner ring raceway surface grindstone 8a (or the outer ring raceway surface grindstone 8b) is moved to the inner ring raceway surface 2s (or The outer ring raceway surface 4s) is pressed with predetermined pressures Fa and Fb (see FIGS. 1A and 1B).

As shown in FIG. 4 (a), the above-mentioned track surface grindstone holders Ha, Hb are arranged on both sides of the pressure head 34 so as to face each other. In the drawing, as an example, a raceway surface grindstone holder Ha that supports the inner ring raceway surface grindstone 8a (hereinafter referred to as an inner ring raceway surface grindstone holder Ha) is disposed on the left side of the drawing, and on the right side of the drawing. In addition, a raceway surface grindstone holder Hb for supporting the outer ring raceway surface grindstone 8b (hereinafter referred to as an outer ring raceway surface grindstone holder Hb) is disposed.

The pressure head 34 is provided with a pair of guide shafts 36a and 36b in parallel with each other, and the guide shafts 36a and 36b are configured and arranged to be movable in the same direction while maintaining a parallel state. ing. Further, an inner ring raceway surface grindstone holder Ha and an outer ring raceway surface grindstone holder Hb are attached to both sides of the pair of guide shafts 36a, 36b. In this case, the inner ring raceway surface grindstone 8a supported by the inner ring raceway surface grindstone holder Ha and the outer ring raceway surface grindstone 8b supported by the outer ring raceway surface grindstone holder Hb are in the same direction on the same plane. Are arranged and arranged in a positional relationship arranged in a line along.

Here, when the pair of guide shafts 36a and 36b are slid in one direction, the inner ring raceway surface grindstone holder Ha and the outer ring raceway surface grindstone holder Hb are simultaneously moved in the same direction, thereby the inner ring raceway. The surface grindstone 8a and the outer ring raceway surface grindstone 8b can be simultaneously moved (slid) in the same direction. On the other hand, when the pair of guide shafts 36a and 36b are slid in the other direction, the inner ring raceway surface grindstone holder Ha and the outer ring raceway surface grindstone holder Hb move simultaneously in the same direction. The raceway surface grindstone 8a and the outer ring raceway surface grindstone 8b can be simultaneously moved (slid) in the same direction.

In addition, a pressure piston is constructed in the pressure head 34 between the pair of guide shafts 36a and 36b in parallel with the guide shafts 36a and 36b. The pressurizing piston includes a piston main body 40 that reciprocates in a cylinder 38 constructed in the pressurizing head 34, and two piston rods 42 a and 42 b extending from both sides of the piston main body 40. The two piston rods 42a and 42b extend in parallel with the above-described pair of guide shafts 36a and 36b. One piston rod 42a is connected to the inner ring raceway surface grindstone holder Ha, and the other piston rod 42b. Is connected to the outer ring raceway surface grindstone holder Hb.

In the cylinder 38, pressure accumulating chambers (hereinafter referred to as a left chamber 38a and a right chamber 38b) are formed on both sides of the piston body 40, and either a left chamber 38a or a right chamber 38b is supplied from a compressed air supply source (not shown). The piston main body 40 can be moved by sending compressed air into one of them. As an example, the drawing shows a state in which compressed air is fed into the right chamber 38b. At this time, the piston main body 40 moves in the direction of the left chamber 38a, so that the two piston rods 42a and 42b are in the same direction. Move to. Accordingly, the inner ring raceway surface grindstone holder Ha and the outer ring raceway surface grindstone holder Hb connected to the piston rods 42a and 42b are simultaneously moved in the same direction while being guided by the pair of guide shafts 36a and 36b. Can be made.

According to such a pressure head 34, when the above-described super-finishing processing start position set is completed and then the pressing process is performed, by sending compressed air to the right chamber 38b (or the left chamber 38a), The inner ring raceway surface grindstone 8a (or outer ring raceway surface grindstone 8b) can be pressed from the direction perpendicular to the inner ring raceway surface 2s (or outer ring raceway surface 4s) with predetermined pressures Fa and Fb (FIG. 4 ( b), (c)). At this time, the directions of the pressures Fa and Fb coincide with the radial direction passing through the rotation axis Ax of the raceway ring holding mechanism 6 (the turntable 12) by the above-described “switching of the inner and outer ring sets at the superfinishing start position”. (See FIGS. 1 (a) and 1 (b)).

Then, in the set state, while the inner ring 2 (or outer ring 4) is rotated in the predetermined direction K, the inner ring raceway surface grindstone from the direction perpendicular to the inner ring raceway surface 2s (or outer ring raceway surface 4s). While traversing Tr along the inner ring raceway surface 2s (or the outer ring raceway surface 4s) while pressing the 8a (or the outer ring raceway surface grindstone 8b) with predetermined pressures Fa and Fb and causing oscillation (small reciprocation) Os. Processing (super finishing) is performed (FIGS. 4B and 4C).

In super finishing, the inner ring raceway surface 2s (or outer ring raceway surface 4s) is smoothed with high precision and high precision by the inner ring raceway surface grindstone 8a (or outer ring raceway surface grindstone 8b). The grinding surface Sa of the raceway surface grindstone 8a is preferably configured in a rounded concave shape, while the grinding surface Sb of the outer ring raceway surface grinding stone 8b is configured in a rounded convex shape.

In super finishing, the pressure head 34 is used to press the inner ring raceway surface grindstone 8a (or outer ring raceway surface grindstone 8b) against the inner ring raceway surface 2s (or outer ring raceway surface 4s) with pressures Fa and Fb. For example, when the inner ring raceway surface grindstone 8a is used, the compressed air is fed into the left chamber 38a of the cylinder 38, and the inner ring raceway surface grindstone 8a is backed (retreated) together with the inner ring raceway surface grindstone holder Ha. The inner ring raceway surface 2s is set at the superfinishing start position, and at that time, the compressed air is fed into the right chamber 38b so that the inner ring raceway surface grindstone 8a is pressed against the inner ring raceway surface 2s with the pressure Fa. In addition, what is necessary is just to perform the process contrary to the above, when using the grindstone 8b for outer ring raceway surfaces.

By the way, in the super finishing for the raceway surfaces (the inner ring raceway surface 2s and the outer ring raceway surface 4s), the inner ring 2 (or the outer ring 4) is directed toward the inner ring shoe 44 in order to maintain the machining accuracy constant and high. The inner ring shoe 44 is preferably rotated with the inner ring shoe 44 as a reference. For this purpose, the center axis of the inner ring 2 (or outer ring 4) is set in a fixed direction by a fixed distance with respect to the rotation axis Ax of the above-described track ring holding mechanism 6 in the above-described "nosepiece inner / outer ring set switching". It is necessary to mount it on each mounting surface 10s (see FIG. 2) of the plurality of bearing ring mounting structures (nosepieces) 10 so as to be shifted (eccentric).

Therefore, as shown in FIGS. 1 (a) and 1 (b), the inner / outer ring combined super finishing panel of the present embodiment is disposed opposite to the both sides of the bearing ring holding mechanism 6 along the direction orthogonal to the rotation axis Ax, In addition, the positions of the bearing rings (inner ring 2 and outer ring 4) to be mounted on the plurality of bearing ring mounting structures (nosepieces) 10 are adjusted, and the bearing rings (inner ring 2, outer ring 4) are directed toward the shoes 44 and 46. A pair of positioning mechanisms (an inner ring positioning mechanism and an outer ring positioning mechanism).

A pair of positioning mechanisms (that is, an inner ring positioning mechanism or an outer ring positioning mechanism) are used for an inner ring that is also used as a configuration that supports the outer diameter surface of the inner ring 2 (or outer ring 4) during super finishing. The inner ring positioning pusher 48 (or outer ring positioning pusher) that presses the inner ring 2 (or outer ring 4) toward the shoe 44 (or outer ring shoe 46) and the inner ring shoe 44 (or outer ring shoe 46). 50) and positioning that enables each shoe 44, 46 and each positioning pusher 48, 50 to approach the inner ring 2 (or outer ring 4) and to be separated from the inner ring 2 (or outer ring 4). Mechanism moving means (that is, inner ring positioning mechanism moving means or outer ring positioning mechanism moving means).

According to this configuration, when the raceway to be processed is the inner ring 2, the outer ring shoe 46 and the outer ring positioning pusher 50 are separated (retracted) from the inner ring 2, and the other inner ring shoe 44 and inner ring shoe are used. The positioning pusher 48 is approached (advanced) toward the inner ring 2 and the inner ring 2 is pressed against the inner ring shoe 44 by the other inner ring positioning pusher 48, thereby pressing the inner ring 2 toward the inner ring shoe 44. Thus, the inner ring shoe 44 can be set to be rotatable with reference to the inner ring shoe 44 (see FIGS. 1A and 3A). In FIG. 3A, the inner ring positioning pusher 48 is omitted.

On the other hand, when the raceway to be processed is the outer ring 4, the other inner ring shoe 44 and the inner ring positioning pusher 48 are separated (retracted) from the outer ring 4, and one outer ring shoe 46 and the outer ring positioning pusher 50 are moved. The outer ring 4 is approached (advanced) toward the outer ring 4, and the outer ring 4 is pressed against one outer ring shoe 46 by one outer ring positioning pusher 50, thereby pressing the outer ring 4 toward the outer ring shoe 46. The shoe 46 can be set to be rotatable with reference to the shoe 46 (see FIGS. 1B and 3B). In FIG. 3B, the outer ring positioning pusher 50 is omitted.

First, in the inner ring positioning mechanism, the inner ring shoe 44 is moved to the inner ring shoe 44 along the direction of the arrow X1 so as to approach the inner ring 2 during the positioning of the inner ring 2 and the subsequent super finishing. Sometimes, a pair of inner ring rolls 44r is provided that contacts the outer diameter surface of the inner ring 2 (the inner ring raceway surface 2s or the collar portion (surface) 2t) and rotates together with the inner ring 2. The pair of inner ring rolls 44r are disposed to face each other along a direction that intersects (orthogonally) the movement direction X1 of the inner ring shoe 44, and are symmetrical with respect to the rotation axis Ax of the track ring holding mechanism 6. Is set.

Further, the pair of inner ring rolls 44r are each supported by an inner ring roll holder 44h so as to be rotatable (for example, rotation free). In each inner ring roll holder 44h, the height position and the radial position of the inner ring roll 44r with respect to the inner ring 2 are adjusted, and a pair of inner ring rolls 44r is positioned during positioning of the inner ring 2 and subsequent superfinishing. Is provided with an adjustment mechanism that makes it possible to accurately apply the torque to the outer diameter surface of the inner ring 2.

The height position means the height (width) from the mounting surface 10s to the inner ring end surface 2a in a state where the inner ring 2 is mounted on the mounting surface 10s (see FIG. 2) of the bearing ring mounting structure (nosepiece) 10. Is assumed. Further, the radial position is assumed to be the distance (interval) between the outer diameter surface of the inner ring 2 and the inner ring roll 44r along the radial direction defined through the rotation axis Ax of the bearing ring holding mechanism 6. To do. The height position and the radial position of each inner ring roll 44r are adjusted in advance before the inner ring shoe 44 is operated, and are maintained in the adjusted state.

Here, as an adjustment mechanism for the height position, for example, as shown in FIG. 3 (a), dovetail grooves 44g extended in the vertical direction on the end surface (side surface facing the inner ring 2) of each inner ring roll holder 44h are provided. Each of the inner ring rolls 44r is formed and inserted into each dovetail groove 44g, and each hozo member 44p is moved along the dovetail groove 44g. The height position of the roll 44r can be adjusted. In this case, it is preferable to provide a positioning and fixing structure for positioning and fixing each of the moved hozo members 44p. In the drawing, the screwing structure 44s is shown as an example of the positioning and fixing structure, but other methods may be used.

Further, as a radial position adjustment mechanism, for example, a pair of guide grooves (not shown) are formed in the inner ring shoe 44 along the radial direction defined through the rotation axis Ax, and each inner ring roll holder A part of 44h is inserted (engaged) into each guide groove, and each inner ring roll holder 44h is moved along the guide groove in the direction of arrow 44T (see FIG. 1B), thereby The radial position of the inner ring roll 44r can be adjusted. In this case, it is preferable to provide a positioning and fixing structure for positioning and fixing each of the moved inner ring roll holders 44h. As an example of the positioning and fixing structure, a screwing structure (not shown) can be applied, but other methods may be used.

Next, in the inner ring positioning mechanism, the inner ring positioning pusher 48 moves the inner ring positioning pusher 48 along the direction of the arrow E1 so that the inner ring positioning pusher 48 approaches the inner ring 2. At the time of finishing, it is configured as a roll that contacts the outer diameter surface of the inner ring 2 and rotates together with the inner ring 2. In this case, the inner ring raceway surface grindstone 8a is in pressure contact with the inner ring raceway surface 2s during the superfinishing process for the inner ring 2, so the inner ring positioning pusher (roll) 48 avoids (offsets) this. The position is set so as to be applied to the outer diameter surface of the inner ring 2.

Further, the inner ring positioning pusher (roll) 48 is rotatably supported (for example, rotation-free) by a pusher support member 52, and the pusher support member 52 is moved along the direction of the arrow E 1 by a pusher position adjustment unit 54. And can be stretched. Although not shown in particular, the pusher position adjustment unit 54 adjusts the height position of the inner ring positioning pusher (roll) 48 relative to the inner ring 2 by moving the pusher support member 52 (moving up and down). In addition, an adjustment mechanism (not shown) is provided that enables the inner ring positioning pusher (roll) 48 to be accurately applied to the outer diameter surface of the inner ring 2 during subsequent superfinishing. The adjustment mechanism need not be described because it is sufficient to use a known technique as it is. Also, the height position of the inner ring positioning pusher (roll) 48 is adjusted in advance before the pusher 48 is operated, and is maintained in the adjusted state.

In the inner ring positioning mechanism, the inner ring positioning mechanism moving means can be realized by a combination of a ball screw (a structure in which a ball rolls and rotates between a screw shaft and a nut) and an AC servo motor. Although not specifically illustrated, for example, in the case of the inner ring shoe 44, the inner ring shoe 44 is connected to the screw shaft arranged along the arrow X1 direction via a nut, and the AC servo motor is connected to the screw shaft. The rotation of the screw shaft may be controlled by a servo motor. Further, in the case of the inner ring positioning pusher 48, the pusher support member 52 is connected to the screw shaft arranged along the arrow E1 direction via a nut, and the AC servo motor is connected to the screw shaft. What is necessary is just to carry out rotation control of the screw shaft.

In this case, in the above-described inner ring positioning mechanism moving means, the inner ring 2 is pressed toward the inner ring shoe 44 during the positioning of the inner ring 2 and the subsequent superfinishing process, and the inner ring shoe 44 is rotated with reference to the inner ring shoe 44. In other words (in other words, the center axis of the inner ring 2 is shifted (decentered) in a certain direction by a certain distance with respect to the rotation axis Ax of the bearing ring holding mechanism 6), the inner ring shoe 44 and the inner ring positioning The process until the pusher 48 is set can be arbitrarily set.

As an example, the pusher support member 52 is moved in the E1 direction so that the inner ring positioning pusher 48 is mounted on each mounting surface 10s (see FIG. 2) of the plurality of bearing ring mounting structures (nosepieces) 10 described above. By approaching the inner ring 2 being in contact with the outer diameter surface thereof, approximate positioning between the central axis of the inner ring 2 and the rotation axis Ax of the race ring holding mechanism 6 is performed. At the same time or at a predetermined timing thereafter, the inner ring shoe 44 is moved in the direction of the arrow X1 to bring the pair of inner ring rolls 44r closer to the inner ring 2 and fixed at the target position. At the same time or at a predetermined timing thereafter, the pusher support member 52 is moved in the direction of the arrow E1 to bring the inner ring positioning pusher 48 closer to the inner ring shoe 44, so that the inner ring 2 faces the inner ring shoe 44. Press.

Then, by repeating such a process until the target value is finally reached or enters an allowable range, the inner ring 2 is pressed toward the inner ring shoe 44, and the inner ring shoe 44 is rotated with reference to the inner ring shoe 44. Thus, the inner ring shoe 44 and the inner ring positioning pusher 48 can be set. Note that the outer ring shoe 46 and the outer ring positioning pusher 50 are separated (retreated) from the inner ring 2 while the setting process as described above is performed.

On the other hand, in the outer ring positioning mechanism, the outer ring shoe 46 is moved in the direction of the arrow X2 so as to approach the outer ring 4 while the outer ring 4 is positioned and thereafter superfinishing. Sometimes, a pair of outer ring rolls 46r is provided that contacts the outer diameter surface (outer ring raceway surface 4s) of the outer ring 4 and rotates together with the outer ring 4. The pair of outer ring rolls 46r are arranged to face each other along a direction transverse (orthogonal) to the moving direction X2 of the outer ring shoe 46, and are symmetrical with respect to the rotation axis Ax of the track ring holding mechanism 6. Is set.

Further, the pair of outer ring rolls 46r are supported by the outer ring roll holder 46h so as to be rotatable (for example, rotation free). Each of the outer ring roll holders 46h adjusts the height position and the radial position of the outer ring roll 46r with respect to the outer ring 4, and a pair of outer ring rolls 46r during positioning of the outer ring 4 and subsequent super finishing. Is provided with an adjustment mechanism that makes it possible to accurately apply the torque to the outer diameter surface of the outer ring 4.

The height position refers to the height (width) from the mounting surface 10s to the outer ring end surface 4a when the outer ring 4 is mounted on the mounting surface 10s (see FIG. 2) of the bearing ring mounting structure (nosepiece) 10. Is assumed. Further, the radial position is assumed to be the distance (interval) between the outer diameter surface of the outer ring 4 and the outer ring roll 46r along the radial direction defined through the rotation axis Ax of the track ring holding mechanism 6. To do. The height position and the radial position of each outer ring roll 46r are adjusted in advance before the outer ring shoe 46 is operated, and are maintained in the adjusted state.

Here, as an adjustment mechanism for the height position, for example, as shown in FIG. 3B, dovetail grooves 46g extended in the vertical direction on the end surfaces (side surfaces facing the outer ring 4) of the respective outer ring roll holders 46h are provided. For each outer ring with respect to the outer ring 4, each of the outer ring 4 is formed and inserted into each dovetail groove 46 g and the dowel member 46 p is moved along the dovetail groove 46 g. The height position of the roll 46r can be adjusted. In this case, it is preferable to provide a positioning and fixing structure for positioning and fixing each of the moved hozo members 46p. In the drawing, the screwing structure 46s is shown as an example of the positioning and fixing structure, but other methods may be used.

Further, as a radial position adjusting mechanism, for example, a pair of guide grooves (not shown) are formed in the outer ring shoe 46 along the radial direction defined through the rotation axis Ax, and each outer ring roll holder is formed. A part of 46h is inserted (engaged) into each guide groove, and each outer ring roll holder 46h is moved along the guide groove in the direction of arrow 46T (see FIG. 1A), thereby The radial position of the outer ring roll 46r can be adjusted. In this case, it is preferable to provide a positioning and fixing structure for positioning and fixing each outer ring roll holder 46h that has been moved. As an example of the positioning and fixing structure, a screwing structure (not shown) can be applied, but other methods may be used.

Next, in the outer ring positioning mechanism, the outer ring positioning pusher 50 moves the outer ring positioning pusher 50 along the direction of the arrow E2 so that the outer ring positioning pusher 50 approaches the outer ring 4. At the time of finishing, the roll is configured as a roll that contacts the outer diameter surface of the outer ring 4 and rotates together with the outer ring 4.

The outer ring positioning pusher (roll) 50 is rotatably supported by a pusher support member 56 (for example, rotation free), and the pusher support member 56 is moved along the direction of the arrow E2 by a pusher position adjusting unit 58. And can be stretched. Although not particularly illustrated, the pusher position adjusting unit 58 adjusts the height position of the outer ring positioning pusher (roll) 50 with respect to the outer ring 4 by moving the pusher support member 56 (up and down movement). In addition, an adjustment mechanism (not shown) is provided that enables the outer ring positioning pusher (roll) 50 to be accurately applied to the outer diameter surface of the outer ring 4 during subsequent superfinishing. The adjustment mechanism need not be described because it is sufficient to use a known technique as it is. Further, the height position of the outer ring positioning pusher (roll) 50 is adjusted in advance before the pusher 50 is operated, and is maintained in the adjusted state.

In the outer ring positioning mechanism, the outer ring positioning mechanism moving means can be realized by a combination of a ball screw (a structure in which a ball rolls and rotates between a screw shaft and a nut) and an AC servo motor. Although not specifically shown, for example, in the case of the outer ring shoe 46, the outer ring shoe 46 is connected to the screw shaft arranged along the arrow X2 direction via a nut, and the AC servo motor is connected to the screw shaft. The rotation of the screw shaft may be controlled by a servo motor. In the case of the outer ring positioning pusher 50, the pusher support member 56 is connected to the screw shaft arranged along the arrow E2 direction via a nut, and the AC servo motor is connected to the screw shaft. What is necessary is just to carry out rotation control of the screw shaft.

In this case, in the above-described inner ring positioning mechanism moving means, the outer ring 4 is pressed toward the outer ring shoe 46 during the positioning of the outer ring 4 and the subsequent superfinishing process, and the outer ring shoe 46 is rotated with reference to the outer ring shoe 46. In other words (in other words, the center axis of the outer ring 4 is shifted (decentered) in a certain direction by a certain distance with respect to the rotation axis Ax of the bearing ring holding mechanism 6), the outer ring shoe 46 and the outer ring positioning The process until the pusher 50 is set can be arbitrarily set.

As an example, the pusher support member 56 is moved in the E2 direction so that the outer ring positioning pusher 50 is mounted on each mounting surface 10s (see FIG. 2) of the plurality of bearing ring mounting structures (nosepieces) 10 described above. By bringing the outer ring 4 close to the outer ring 4 and bringing it into contact with the outer diameter surface, approximate positioning between the central axis of the outer ring 4 and the rotation axis Ax of the race ring holding mechanism 6 is performed. At the same time or at a predetermined timing thereafter, the outer ring shoe 46 is moved in the direction of the arrow X2 to bring the pair of outer ring rolls 46r closer to the outer ring 4 and fixed at the target position. At the same time or at a predetermined timing thereafter, the pusher support member 56 is moved in the direction of arrow E2 to bring the outer ring positioning pusher 50 closer to the outer ring shoe 46, so that the outer ring 4 faces the outer ring shoe 46. Press.

Then, by repeating such a process until the target value is finally reached or enters an allowable range, the outer ring 4 is pressed toward the outer ring shoe 46, and the outer ring shoe 46 is rotated as a reference. Thus, the outer ring shoe 46 and the outer ring positioning pusher 50 can be set. During the setting process as described above, the inner ring shoe 44 and the inner ring positioning pusher 48 are separated (retreated) from the outer ring 4.

Here, the inner ring 2 (or the outer ring 4) is pressed toward the inner ring shoe 44 (or the outer ring shoe 46), and is rotated based on the inner ring shoe 44 (or the outer ring shoe 46). When the inner ring shoe 44 (or outer ring shoe 46) and the inner ring positioning pusher 48 (or outer ring positioning pusher 50) are set, the above-described positioning mechanism moving means (that is, the inner ring positioning mechanism) is set. In the stop position control of the moving means or the outer ring positioning mechanism moving means), the “model number”, “product number”, etc. assigned to the inner ring 2 and the outer ring 4 are input to a control device (not shown), not shown. While detecting the rotational position and rotational speed of the output shaft of each of the AC servo motors described above by the encoder (rotation detector), the current position (coordinate) signal and the target position ( Performing feedback control (position control and speed control) is compared with the target) signal.

At this time, if there is a difference between the current position (coordinate) signal and the target position (coordinate) signal, the AC servo motor described above is operated (rotated) in a direction to reduce the difference from the target position (coordinate). Then, the above-described stop position control of the positioning mechanism moving unit is performed by repeating this procedure until the target value is finally reached or the allowable value is entered. As another method, the current position information of the AC servo motor described above is digitally recorded, and a difference to the target position (coordinate) signal is given to the current position information so that the target value is reached at once. Good.

In this case, assuming a case where, for example, superfinishing is alternately performed on the inner ring 2 and the outer ring 4 such as a specific “model number” and “product number”, the stop position of the positioning mechanism moving unit described above is the inner ring 2. The inner ring shoe 44 and the inner ring positioning pusher 48 are set so that the inner ring shoe 44 and the inner ring positioning pusher 48 are rotated with reference to the inner ring shoe 44 and the outer ring 4. The outer ring shoe 46 and the outer ring positioning pusher 50 are limited to two positions (coordinates) where the outer ring shoe 46 and the outer ring positioning pusher 50 are set so as to be pressed toward the outer shoe 46 and rotated with reference to the outer ring shoe 46.

For this reason, the inner ring 2 is pressed toward the inner ring shoe 44 by operating (rotating) the AC servo motor so as to eliminate the difference between the first position signal (coordinates) and the second position signal (coordinates). A position “inner ring set” (FIG. 1 (a), FIG. 3 (a)) at which the inner ring shoe 44 and the inner ring positioning pusher 48 are set so as to rotate with respect to the inner ring shoe 44; The position “outer ring set” where the outer ring shoe 46 and the outer ring positioning pusher 50 are set so that the outer ring 4 is pressed toward the outer ring shoe 46 and rotated with the outer ring shoe 46 as a reference (FIG. 1). (b) and FIG. 3 (b)) can be automatically switched. Hereinafter, this is referred to as “switching of inner and outer rings of shoe pusher”.

As described above, according to the inner / outer ring combined raceway surface super finishing unit U1 of the inner / outer ring super finishing panel, the super finishing process for the inner ring 2 and the outer ring 4 can be automatically performed with a single (one) facility. Thus, switching between a set (specification) for super finishing for the inner ring 2 and a set (specification) for super finishing for the outer ring 4 (ie, alternate machining of the inner and outer rings 2, 4) is performed automatically. The technology that makes this possible can be realized.

Specifically, when superfinishing the raceway surfaces (inner ring raceway surface 2s, outer ring raceway surface 4s) of the race rings (inner ring 2, outer ring 4), a plurality of race rings are mounted by “switching the inner and outer ring sets of the nosepiece”. The structural body (nosepiece) 10 can be automatically switched between a set for holding the inner ring 2 and a set for holding the outer ring 4. As a result, the inner ring 2 (or the outer ring 4) can be automatically mounted on each mounting surface 10s (FIGS. 2A and 2B).

In synchronization (following) with this, the inner ring shoe 44 and the inner ring positioning pusher 48, and the outer ring shoe 46 and the outer ring positioning pusher 50 are replaced with the inner ring shoe 44 by “switching the inner and outer rings of the shoe and pusher”. It is possible to automatically switch between a set that rotates with the inner ring 2 pressed and a set that rotates with the outer ring shoe 46 pressed against the outer ring shoe 46. This automatically aligns (centers) the inner ring 2 (or outer ring 4) with the inner ring shoe 44 (or outer ring shoe 46) on the plurality of track ring mounting structures (nosepieces) 10 described above. (FIGS. 1A and 1B).

Synchronously (following), a set in which the inner ring 2 is pressed against each mounting surface 10s and a set of the outer ring 4 pressed against each mounting surface 10s by "pressure roll inner / outer ring set switching". And can be switched automatically. Thereby, the inner ring 2 (or the outer ring 4) is automatically pressed into contact with each mounting surface 10s, and can be rotated integrally with each bearing ring mounting structure (nosepiece) 10 (FIG. 3A ), (b)).

Synchronously (following), the inner ring raceway surface grindstone 8a and the outer ring raceway surface grindstone 8b are directed to the superfinishing machining start position of the inner ring raceway surface 2s by “switching the inner and outer ring sets at the superfinishing processing start position”. Thus, it is possible to automatically switch between a set for moving and turning and a set for moving and turning toward the super-finishing start position of the outer ring raceway surface 4s. As a result, the inner ring raceway surface grindstone 8a (or the outer ring raceway surface grindstone 8b) with respect to the superfinishing start position of the inner ring raceway surface 2s (or outer ring raceway surface 4s) of the inner ring 2 (or outer ring 4). Can be automatically set (FIGS. 3A and 3B).

In synchronization (following) with this, the inner ring 2 (or the outer ring 4) integrated with each track ring mounting structure (nosepiece) 10 is rotated in a predetermined direction K as the turntable 12 rotates. In this state, while pressing the inner ring raceway surface grindstone 8a (or outer ring raceway surface grindstone 8b) from the direction perpendicular to the inner ring raceway surface 2s (or outer ring raceway surface 4s) with predetermined pressures Fa and Fb, A process of traversing Tr along the inner ring raceway surface 2s (or outer ring raceway surface 4s) can be performed while oscillating (small reciprocating motion) Os (FIGS. 4B and 4C).

At this time, the inner ring raceway surface grindstone 8a (or the outer ring raceway surface grindstone 8b) and the pair of inner ring rolls 44r of the inner ring shoe 44 (or the pair of inner ring rolls 46r of the outer ring shoe 46) are: The inner ring raceway surface 2s (or the outer ring raceway surface 4s) has a positional relationship in which the pressure Fa of the inner ring raceway surface grindstone 8a (or the pressure Fb of the outer ring raceway surface grindstone 8b) cancels out.

In this state, the rotating inner ring 2 (or outer ring 4) is always pressed toward the inner ring shoe 44 (or outer ring shoe 46). As a result, the inner ring 2 (or outer ring 4) can be rotated with reference to the inner ring shoe 44 (or outer ring shoe 46), so that the inner ring raceway surface 2s (or outer ring raceway surface 4s) can be rotated. Super-finishing can be performed with extremely high accuracy.

According to this, the super finishing processing for the inner ring 2 and the outer ring 4 can be automatically performed by a single (one) facility, so that the super finishing processing equipment dedicated to the inner ring raceway surface as in the prior art, Since it is not necessary to provide the super finishing processing equipment dedicated to the raceway surface independently, it is not necessary to secure the installation space by that amount, and the capital investment cost and power consumption can be reduced. Thereby, it is possible to achieve significant cost reduction, space saving, and energy saving as compared with the conventional case.

Furthermore, switching between a set (specification) for super finishing for the inner ring 2 and a set (specification) for super finishing for the outer ring 4 (that is, alternate machining of the inner and outer rings 2, 4) is performed automatically. For example, the positioning work of the holding member for holding the inner ring 2 and the outer ring 4 and the positioning work of the super finishing grindstones 8a and 8b with respect to the inner ring raceway surface 2s and the outer ring raceway surface 4s are all possible. As a result, the labor and time required for super-finishing can be greatly reduced. For this reason, it is possible to dramatically improve the work efficiency of super finishing, and in particular, by introducing the above-described super finishing panel for both inner and outer rings into a production line that requires a large variety of small lots, This can greatly contribute to the improvement of the working rate.

In the above-described embodiment, it is assumed that the inner ring 2 with a flange and the outer ring 4 without a flange for a single row tapered roller bearing are applied, and the inner ring raceway surface 2s and the outer ring raceway surface 4s are superfinished. However, the present invention is not limited to this, and a double-row cylindrical and conical inner ring 2 (FIGS. 5A to 5C) having a collar portion (surface) 2t, and an outer ring 4 having various other outer ring raceway surfaces 4s. Needless to say, super finishing can also be performed in the same way (FIGS. 5D to 5G). In particular, the super-finishing of the double-row inner and outer rings 2, 4 (Figs. 5 (b), (c), (f), (g)) can also be performed with one chuck, dramatically improving the processing efficiency. Can be made.

In the above-described embodiment, the inner ring 2 (or the outer ring 4) is integrated with each track ring mounting structure (nosepiece) 10 by the pair of rolls 26r in the “pressure roll inner / outer ring set switching”. However, instead of this, for example, the rotating base 12 constituting one structure of the bearing ring holding mechanism 6 is configured as a magnet chuck, and each bearing ring mounting structure (nosepiece) 10 is configured of a conductive material. . Then, the inner ring 2 (or the outer ring 4) having conductivity may be attracted to and integrated with each track ring mounting structure (nose piece) 10 by the magnetic action of the magnet chuck. In this case, the magnet chuck and the pair of rolls 26r may be used in combination. When the inner ring 2 (or outer ring 4) is attracted to each track ring mounting structure (nose piece) 10 by a magnet chuck (that is, when the inner ring shoe 44 (or outer ring shoe 46) is not used). The inner ring 2 (or outer ring 4) is connected to each bearing ring mounting structure (nose piece) so that the central axis of the inner ring 2 (or outer ring 4) and the rotation axis Ax of the bearing ring holding mechanism 6 coincide with each other. 10 is mounted.

"Tub part super finishing unit U2"
As shown in FIG. 1 (a), the brim portion superfinishing processing unit U2 of the present embodiment includes a plurality of brim portions (surfaces) 2t (in the figure, one brim portion (surface) 2t). It is possible to perform superfinishing with respect to (shown) automatically at the same time with a single (one) facility. Thereby, it is possible to perform the super finishing process for each collar portion (surface) 2t fully automatically at the same time as the super finishing process for the inner ring raceway surface 2s.

As shown in FIGS. 1 (a), 6 (a), 6 (b), 7 (a), and 7 (b), the brim portion superfinishing processing unit U2 supports one brim portion grindstone 60a. The collar part machining head 60, the collar part machining head 60 are supported in a reversible manner, and the reversing mechanism 62 for reversing the collar part grindstone 60a around the reversing axis R at a desired angle, and the reversing mechanism 62 are supported. The reversing mechanism 62 and the collar portion machining head 60 are swung in a desired direction θ, and an operating device 64 is provided for minute reciprocation (oscillation) Os.

The actuating device 64 has a rotating shaft 66 (see FIG. 7B) that can be rotated by the driving source M, and converts the rotating motion of the rotating shaft 66 into a reciprocating motion and transmits it to the reversing mechanism 62. An oscillation mechanism 68 configured to reciprocate the collar part grindstone 60a of the collar part machining head 60 and a rotary shaft 66 concentrically, and by turning the reversing mechanism 62, the collar part grindstone of the collar part machining head 60 is rotated. And a turning mechanism 70 that turns the 60a to a desired angle.

The oscillation mechanism 68 is provided integrally with the rotation shaft 66. When the rotation center is eccentric (displaced) from the rotation center of the rotation shaft 66, the oscillation mechanism 68 is eccentric (see FIG. 7B). An oscillation portion 68p that is attached to the shaft portion 66p so as to be rotatable relative to the shaft portion 66p and supports the reversing mechanism 62 is provided.

The turning mechanism 70 can be rotated concentrically with the rotation shaft 66 of the oscillation mechanism 68, and the angle adjustment gear shaft portion 72, which is a separate shaft from the rotation shaft 66, and the angle adjustment gear shaft portion 72. An angle adjustment table 74 that is connected and rotates the oscillation unit 68p to a desired angle is provided.

In this case, the angle adjusting gear shaft portion 72 is fixed concentrically along the outer periphery of the spindle shaft 76 and the hollow spindle shaft 76 (see FIG. 7B) provided concentrically along the outer periphery of the rotating shaft 66. And a hollow annular angle adjusting gear 78 (see FIG. 7B). The angle adjustment table 74 described above is fixed to the angle adjustment gear 78 and rotates concentrically with the spindle shaft 76 together with the angle adjustment gear 78.

A plurality of (for example, two in the drawing) bearings 80 (see FIG. 7B) are interposed between the rotary shaft 66 and the spindle shaft 76, and the rotary shaft 66 is driven by these bearings 80. And the spindle shaft 76 are positioned so as to be relatively rotatable. Further, the spindle shaft 76 is provided in a fixed housing 84 (see FIG. 7B) via a plurality of bearings 82 (see FIG. 7B) provided on the outer periphery of the spindle shaft 76 (see FIG. 7B). The drive source M is mounted on the fixed housing 84 and is positioned so as to be rotatable.

7 (b) and 7 (c), in the oscillation mechanism 68, the above-described oscillation portion 68p and the eccentric shaft portion 66p are coupled via a bearing 86 so as to be relatively rotatable. Further, the oscillation unit 68p is a gear mechanism 88 (specifically, meshed with the angle adjustment gear shaft portion 72 (specifically, the angle adjustment gear 78 to which the angle adjustment table 74 is fixed) by an AC servo motor described later. The rotation is controlled at a desired angle (described later). For this reason, the oscillation part 68p does not rotate with the eccentric shaft part 66p that rotates eccentrically with the rotary shaft 66 described above.

As a result, when the rotary shaft 66 is rotated by the drive source M, the rotary motion is converted from the eccentric shaft portion 66p to the reciprocating motion via the oscillation portion 68p and transmitted to the reversing mechanism 62. The 60 bristle grindstones 60a can be finely reciprocated (oscillated) Os. FIG. 7 (c) shows the configuration of the oscillation portion 68p. However, it is possible to convert the rotational motion of the rotary shaft 66 from the eccentric shaft portion 66p to the reciprocating motion via the oscillation portion 68p. For example, the oscillation unit 68p is not limited to the configuration shown in FIG. 7C, and may have a configuration other than this.

When the angle adjustment gear shaft 72 (that is, the angle adjustment gear 78) is rotated, the rotational movement is transmitted from the angle adjustment table 74 to the oscillation unit 68p, and the oscillation unit 68p is rotated together with the angle adjustment table 74. By doing so, the collar part processing head 60 can be turned to a desired angle θ together with the reversing mechanism 62.

Here, the operation of rotating the angle adjusting gear 78 together with the angle adjusting table 74 and turning the collar portion machining head 60 to the desired angle θ includes the gear mechanism 88 meshed with the angle adjusting gear 78 and the AC. It can be realized by a combination with a servo motor. Although not particularly illustrated, for example, an AC servo motor may be connected to the rotation shaft of the gear mechanism 88, and the rotation shaft may be rotationally controlled by the AC servo motor. Thereby, the collar part processing head 60 can be rotated to desired angle (theta).

Such a brim portion superfinishing processing unit U2 is mounted on a Z-axis table 90 that is movable in the arrow Z direction, and the above-described fixed housing 84, together with the drive source M mounted on the Z-axis table 90, 90 is fixed on. Further, the Z-axis table 90 is mounted on an X-axis table 92 that can move in the arrow X direction. According to this, by moving the Z-axis table 90 and the X-axis table 92 to a desired distance (position), the collar part machining head 60 can be moved in a desired direction by a desired amount (distance).

Here, the operation of moving the Z-axis table 90 and the X-axis table 92 to each desired distance (position) is a combination of a ball screw (a structure in which a ball rolls and rotates between a screw shaft and a nut) and an AC servo motor. Can be realized. Although not specifically illustrated, for example, in the case of the Z-axis table 90, the Z-axis table 90 is connected to the screw shaft arranged along the arrow Z direction via a nut, and the AC servo motor is connected to the screw shaft. The rotation of the screw shaft may be controlled by a servo motor. In the case of the X-axis table 92, the X-axis table 92 is connected to the screw shaft arranged along the arrow X direction via a nut, and the AC servo motor is connected to the screw shaft. The rotation of the shaft may be controlled.

In this case, the turning control of the collar part machining head 60 by the angle adjustment table 74 and the movement control of the collar part machining head 60 by the Z-axis table 90 and the X-axis table 92 finally reach the target value. Or by repeating until it is within the allowable range, as shown in FIG. 6B, for example, as shown in FIG. 6B, the brim portion super finishing unit U2 is set at a position where it does not interfere with the inner / outer ring combined raceway surface super finishing unit U1. As a result, the flange portion grindstone 60a supported by the flange portion processing head 60 can be set on the flange portion (surface) 2t of the inner ring 2.

Here, when setting the collar portion grindstone 60a on the collar portion (surface) 2t of the inner ring 2, in the stop position control of the angle adjustment table 74, the Z-axis table 90, and the X-axis table 92, the inner ring 2 with a collar is provided. The “model number” and “product number” assigned for each type are input to a control device (not shown), and an encoder (rotation detector) (not shown) While detecting the rotational speed, the current position (coordinate) signal and the target position (coordinate) signal are compared to perform feedback control (position control or speed control).

At this time, if there is a difference between the current position (coordinate) signal and the target position (coordinate) signal, the AC servo motor described above is operated (rotated) in a direction to reduce the difference from the target position (coordinate). Then, by repeating this procedure until the target value is finally reached or the allowable range is entered, stop position control of the angle adjustment table 74, the Z-axis table 90, and the X-axis table 92 is performed. As another method, the current position information of the AC servo motor described above is digitally recorded, and a difference to the target position (coordinate) signal is given to the current position information so that the target value is reached at once. Good.

When the stop position control is completed, the collar portion grindstone 60a is set on the collar portion (surface) 2t of the inner ring 2, and in this state, the oscillation mechanism 68 described above is operated, specifically, by the drive source M. The rotary shaft 66 is rotated, and the rotational motion is converted from the eccentric shaft portion 66p to the reciprocating motion via the oscillation portion 68p and transmitted to the reversing mechanism 62, and the collar portion grindstone 60a of the collar portion machining head 60 is slightly changed. By performing reciprocation (oscillation) Os, even when the above-described superfinishing process is performed on the inner ring raceway surface 2s, the superfinishing process can be performed on the collar portion (surface) 2t at the same time.

Further, the brim part super finishing unit U2 of the present embodiment supports the brim part machining head 60 in a reversible manner, and reverses the collar part grindstone 60a around the reverse axis R at a desired angle. Therefore, it is possible to automatically perform super finishing for a plurality of collar portions (surfaces) 2t in a single (one) facility at the same time.

For example, as shown in FIG. 8 (a), in the double-row conical inner ring 2, when the two flange surfaces 2t are opposed to each other in the center along the circumferential direction, the angle adjustment table 74 and the Z-axis table 90 described above are used. Then, the stop position control of the X-axis table 92 is performed, the collar portion grindstone 60a is set on the collar surface 2t on one side, the collar portion grindstone 60a is slightly reciprocated (oscillated) Os, and the collar surface 2t Super finishing for

Subsequently, the stop position control of the angle adjustment table 74, the Z-axis table 90, and the X-axis table 92 described above is performed again to set the brim portion grindstone 60a on the other brim surface 2t (or , Before setting), the collar portion machining head 60 is reversed by the reversing mechanism 62 and the collar portion grinding stone 60a is reversed by 180 ° around the reversing axis R. Thereby, the superfinishing process with respect to the other collar surface 2t can be performed with the said grindstone 60a for collar parts.

As shown in FIG. 8B, in the single-row (double-row) cylindrical inner ring 2, when the two flange surfaces 2t are disposed opposite to each other along the circumferential direction, the angle adjustment table 74 described above, The stop position control of the Z-axis table 90 and the X-axis table 92 is performed, the collar part grindstone 60a is set on the one collar face 2t, and the collar part grindstone 60a is slightly reciprocated (oscillated) Os. Super finishing is performed on the collar surface 2t.

Subsequently, as shown in FIG. 8 (c), the stop position control of the angle adjustment table 74, the Z-axis table 90, and the X-axis table 92 described above is performed again, and the collar portion grindstone 60a is moved to the other side. When setting the collar surface 2t (or before setting), the collar portion machining head 60 is reversed by the reversing mechanism 62, and the collar portion grindstone 60a is reversed by 180 ° around the reversing axis R. Thereby, the superfinishing process with respect to the other collar surface 2t can be performed with the said grindstone 60a for collar parts.

In this case, assuming the case where superfinishing is continuously performed on the two flange surfaces 2t of the inner ring 2 such as a specific “model number” and “product number”, the angle adjustment table 74 and the Z-axis table 90 described above are assumed. And the stop position of the X-axis table 92 includes a first position (coordinates) for setting the collar portion grindstone 60a on one side collar surface 2t, and a second position for setting the collar portion grindstone 60a on the other side collar surface 2t. It is limited to two locations (coordinates). For this reason, by operating (rotating) the AC servo motor so as to eliminate the difference between the first position signal (coordinates) and the second position signal (coordinates), the collar part grindstone 60a is moved to the first position ( (Coordinates) and the second position (coordinates) can be automatically switched.

As described above, according to the super-finishing processing unit U2 for the inner and outer ring super finishing board, the super-finishing processing for the plurality of collar portions (surface 2t) of the inner ring 2 with the collar can be performed simultaneously with a single (one) facility. Thus, the super finishing for the plurality of collar portions (surfaces) 2t can be performed fully automatically simultaneously with the super finishing for the inner ring raceway surface 2s.

According to this, the superfinishing processing for a plurality of collar portions (surface 2t) can be automatically performed by a single (one) facility, so that a plurality of collar portions (surfaces) dedicated to conventional ones can be used. Since it is not necessary to provide each superfinishing device independently, the device can be reduced in size accordingly, and the capital investment cost and power consumption can be reduced. Thereby, significant cost reduction and energy saving can be achieved.

Furthermore, simultaneously with super finishing for the inner ring raceway surface 2s, super finishing processing for the plurality of collar portions (surfaces) 2t can be performed fully automatically, thereby improving the processing efficiency for the plurality of collar portions (surface 2t). Therefore, the productivity of the collared inner ring 2 can be dramatically improved.

Furthermore, switching between the setting of the brim portion grindstone 60a for the one brim surface 2t and the setting of the brim portion grindstone 60a for the other brim surface 2t can be performed fully automatically at the same time. By making it possible, for example, the positioning work of the brim portion grindstone 60a with respect to the plurality of brim surfaces 2t becomes unnecessary, and as a result, labor and time required for super finishing can be greatly reduced. For this reason, it is possible to dramatically improve the work efficiency of super finishing, and in particular, by introducing the above-described super finishing panel for both inner and outer rings into a production line that requires a large variety of small lots, This can greatly contribute to the improvement of the working rate.

Still further, a rotary shaft 66 for reciprocating (oscillating) the collar portion grindstone 60a of the collar portion machining head 60, and a spindle shaft 76 for rotating the collar portion grindstone 60a of the collar portion machining head 60; And the drive source M for rotating the rotary shaft 66 is fixed to the Z-axis table 90 via the fixed housing 84, so that, for example, the power cable of the drive source M ( It is possible to prevent the occurrence of problems such as twisting of the (not shown) or failure of the drive source M.

Although the present invention has been described in detail and with reference to specific embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention.
This application is based on Japanese Patent Application No. 2011-038155 filed on Feb. 24, 2011 and Japanese Patent Application No. 2011-038156 filed on Feb. 24, 2011, the contents of which are incorporated herein by reference.

2 Inner ring 2s Inner ring raceway surface 4 Outer ring 4s Outer ring raceway surface 6 Raceway ring holding mechanism 8 Raceway surface processing mechanism 8a Inner ring raceway surface whetstone 10 Outer ring raceway surface whetstone 10 Bearing ring mounting structure 28 Holder moving turning means Ax Rotating shaft Ha Wheel holder for inner ring raceway surface Hb Wheel holder for outer ring raceway surface

Claims (8)

A super finishing machine for both inner and outer rings that automatically performs super finishing on inner and outer rings with a single facility.
A bearing ring holding mechanism that rotatably holds the bearing ring about the rotation axis;
A raceway surface machining mechanism that performs superfinishing on the raceway surface of the raceway held rotatably,
The bearing ring holding mechanism is
A plurality of bearing ring mounting structures that are arranged at predetermined intervals along the circumferential direction concentrically with respect to the rotation axis, and on which the bearing rings can be mounted,
Depending on the type of raceway to be processed, the structure moving that allows the plurality of raceway mounting structures to be simultaneously approached radially toward the rotating shaft and radially separated from the rotating shaft. Means and
The raceway surface machining mechanism is:
A raceway surface grindstone holder that supports both the inner ring raceway surface grindstone and the outer ring raceway surface grindstone;
A holder moving swiveling means capable of moving the grindstone holder for the raceway surface in a desired direction and turning the grindstone holder to a desired angle in super finishing for the raceway surface;
When the raceway to be machined is an inner ring, when superfinishing the inner ring raceway surface, the inner ring raceway surface is pressed against the inner ring raceway surface, and when the raceway to be machined is an outer ring, the outer ring raceway surface A superfinishing machine for both inner and outer rings, characterized by comprising grinding wheel pressing means that enables the outer ring raceway surface to be pressed against the outer ring raceway surface during superfinishing. In the bearing ring holding mechanism, each of the plurality of bearing ring mounting structures is provided with mounting surfaces on which the bearing rings can be mounted on the same plane perpendicular to each other, and
The bearing ring holding mechanism is provided with a pressure contact structure that presses the bearing ring against each mounting surface,
2. The inner and outer ring combined use superstructure according to claim 1, wherein the bearing ring can be rotated integrally with the bearing ring mounting structure by pressing the bearing ring to each mounting surface by a pressure contact structure. Finishing board. A pair of positioning mechanisms are provided on both sides of the bearing ring holding mechanism so as to face each other along the direction orthogonal to the rotation axis and adjust the positions of the bearing rings mounted on the plurality of bearing ring mounting structures. And
Each of the pair of positioning mechanisms is
For super finishing, a shoe that is also used as a structure that supports the outer diameter surface of the race,
A bearing ring positioning pusher that presses the bearing ring toward the shoe;
Positioning mechanism moving means for allowing the shoe and the positioning pusher to approach the raceway and to be separated from the raceway,
When the raceway to be machined is an inner ring, one shoe and positioning pusher are separated from the inner ring, the other shoe and positioning pusher are approached toward the inner ring, and the inner ring is applied to the other shoe by the other positioning pusher. To position the inner ring,
When the raceway to be processed is an outer ring, the other shoe and positioning pusher are separated from the outer ring, and one shoe and positioning pusher are approached toward the outer ring, and the outer ring is applied to one shoe by one positioning pusher. The superfinishing board for both inner and outer rings according to claim 1, wherein the outer ring is positioned by attaching. The raceway grindstone holder comprises an inner ring raceway surface grindstone holder that supports the inner ring raceway surface grindstone, and an outer ring raceway surface grindstone holder that supports the outer ring raceway surface grindstone.
The grindstone pressing means includes a cylinder, a piston main body provided in the cylinder, and two piston rods extending from both sides of the piston main body to the outside of the cylinder,
2. The inner / outer ring combined super wheel according to claim 1, wherein the inner ring raceway surface grindstone holder is connected to one of the two piston rods, and the outer ring raceway surface grindstone holder is connected to the other. Finishing board. A brim processing head for supporting the brimstone,
A reversing mechanism for reversibly supporting the collar portion processing head and reversing the collar portion grindstone at a desired angle around the reversing axis;
2. The actuator according to claim 1, further comprising: an operating device that supports the reversing mechanism, and rotates the collar part processing head in a desired direction together with the reversing mechanism and causes a slight reciprocating motion. Super finishing board for both inner and outer rings. The actuating device is:
It has a rotary shaft that can be rotated by a drive source, and converts the rotary motion of the rotary shaft into a reciprocating motion and transmits it to the reversing mechanism, thereby causing the collar portion grinding head of the collar portion machining head to reciprocate slightly. The oscillation mechanism,
6. A turning mechanism configured to be concentric with a rotation shaft and turning the reversing mechanism to turn the collar grinding wheel of the collar part machining head to a desired angle. Super finishing board for both inner and outer rings as described in 1. The oscillation mechanism is
An eccentric shaft provided on the rotary shaft;
An oscillation part attached to the eccentric shaft part so as to be rotatable relative to the eccentric shaft part, and supporting the reversing mechanism,
When the rotary shaft is rotated, the rotary motion is converted from the eccentric shaft portion to the reciprocating motion through the oscillation portion and transmitted to the reversing mechanism, whereby the collar portion grindstone of the collar portion machining head is The super finishing board for both inner and outer rings according to claim 6, wherein the super finishing board is used for reciprocal movement. The turning mechanism is
An angle adjusting gear shaft portion that is concentrically rotatable with the rotation shaft of the oscillation mechanism, and is configured as a separate shaft from the rotation shaft;
An angle adjustment table connected to the angle adjustment gear shaft portion and rotating the oscillation portion to a desired angle;
When the angle adjustment gear shaft portion is rotated, the rotational movement is transmitted from the angle adjustment table to the oscillation portion, and the oscillation portion is rotated together with the angle adjustment table, so that the collar portion together with the reversing mechanism is provided. The super finishing board for both inner and outer rings according to claim 6 or 7, wherein the machining head is turned to a desired angle.

Images