JP2013173201A - Superfinishing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a superfinishing device requiring no manual adjustment work of an angle for inclining a grinding tool to a bearing raceway surface even if the angle is changed.SOLUTION: An oscillation device 30 and a drive device 40 are configured to be displaced in an X-axis direction and a Z-axis direction to enable the mutual and relative movement of an intermediate shaft spindle 42 and an oscillation spindle 37 in the X-axis direction and the Z-axis direction, thereby enabling the optional setting of an angle for inclining a grinding tool 3 to a bearing raceway surface 12. Accordingly, even if changing an inclined angle of the grinding tool 3 to the bearing raceway surface 12, an automatic change is enabled without preforming the manual adjustment work of the angle, and high speed can be achieved.

Description

  The present invention relates to a superfinishing apparatus for superfinishing a bearing raceway surface with a grindstone.

  In general, the super finishing of the bearing raceway surface of the bearing inner ring or the bearing outer ring is performed by rotating the bearing inner ring or the bearing outer ring and swinging the grinding wheel while pressing the grinding wheel against the bearing raceway surface.

  For example, in the superfinishing apparatus of Patent Document 1, the inclination angle of the grindstone with respect to the bearing raceway surface is changed by changing the distance between the oscillating device and the drive unit uniaxially, thereby processing the two rows of bearing raceway surfaces. Is done without changeover.

More specifically, the superfinishing apparatus 100 of Patent Document 1 will be described with reference to FIGS.
In FIG. 9, 101 is a base, 102 is a drive motor, 103 is a drive belt, 104 is a speed reducer that constitutes the drive unit 105 together with the drive motor 102 and the drive belt 103, and the speed reduction output of the speed reducer 104 is from the disk 106. Extracted as a rotational motion.

  Reference numeral 107 denotes a rocking device. The rocking device 107 has a link 108 as a rocking input portion on the input side, and has a grindstone holder 109 coaxially integrated with the link 108 on the output side. A grindstone 110 is attached to the tip of 109. Further, the swing device 107 is provided with a feed device 115 for slidably displacing in the X-axis direction, and the swing device 107 moves on the guide rail 114 in accordance with the rotation operation of the feed handle 116 of the feed device 115. By sliding displacement in the X-axis direction, the X-axis direction distance between the swing device 107 and the drive unit 105 can be adjusted.

  Reference numeral 111 denotes a spindle head that chucks a double race type workpiece 100W by the chuck 112 and rotates the workpiece 100W.

  A connecting rod 113 is connected to the disc 106 of the speed reducer 104 at a connecting position Pa that is offset from the center of rotation by an offset amount ea, and the connecting rod 113 is connected to a link 108. Therefore, the rotational motion of the disc 106 is converted into the swing motion of the swing device 107 (the grindstone holder 109) by the connecting rod 113 and the link 108, and the grindstone 110 swings in the X-axis direction.

  In the superfinishing apparatus 100 configured as described above, first, when processing one bearing raceway surface 100G1, as shown in FIG. 10, the grindstone 110 is matched with the inclination of the groove center angle αa of the bearing raceway surface 100G1. Are inclined and pressed on the bearing raceway surface 100G1, and the positions of the grindstone holder 109 and the rocking device 107 are determined so that the grindstone 110 rocks evenly from side to side about the center line Ma of the rocking angle θa of the grindstone 110. When the drive motor 102 is started in this state, the grindstone 110 swings in the range of the swing angle θa around the center line Ma, and the bearing raceway surface 100G1 is superfinished.

  Next, as shown in FIG. 11, when superfinishing the other bearing raceway surface 100G2, the swing device 107 is moved in the X-axis direction by the distance Xa between the two bearing raceway surfaces 100G1 and 100G2. Thus, the link 108 is rotated by 2αa, and the grindstone 110 is inclined and pressed against the bearing raceway surface 100G2 so as to coincide with the inclination of the groove center angle αa of the bearing raceway surface 100G2. When the drive motor 102 is started in this state, the grindstone 110 swings in the range of the swing angle θa around the center line Ma, and the bearing raceway surface 100G2 is superfinished.

Japanese Utility Model Publication No. 1-66058

  By the way, in the conventional superfinishing apparatus, when superfinishing is performed on the bearing raceway surface of a bearing having a different groove center angle inclination, for example, after the superfinishing process is performed on the bearing raceway surface of the deep groove ball bearing, When superfinishing the bearing raceway surface of a ball bearing, it is necessary to adjust the inclination angle of the grindstone that presses the bearing raceway surface according to the groove center angle of the bearing raceway surface. Was essential.

  Therefore, it is conceivable as a proposal to automatically adjust the inclination angle of the grindstone according to the groove center angle of the bearing raceway surface by the superfinishing apparatus described in Patent Document 1. For example, as shown in FIG. 12 (a), after superfinishing the bearing raceway surface of the groove center angle αa (= 0) at the swing angle θa1, as shown in FIG. 12 (b), Consider a case where superfinishing is performed at a swing angle θa2 on a bearing raceway surface having a groove center angle αa (≠ 0). Here, in FIGS. 12A and 12B, the left-side circular dashed-dotted line is the locus of the connection position Pa between the disk 106 and the connecting rod 113 during rotation, and the right-side circular broken line is This is the locus of the connecting position Qa between the connecting rod 113 and the link 108.

12A, the angle formed by the connecting rod 113 and the link 108 is βa1, and the distance between the rotation center 106M of the disk 106 and the rotation center 108A of the link 108 is √ (Xa1 ² + Za1). ² ).

In this state, as shown in FIG. 12B, when the inclination angle of the grindstone 110 is automatically adjusted to coincide with the bearing raceway surface of the groove center angle αa, the swing device 107 (link 108) is fed by the feeding device 115. Is adjusted by displacing X in the X-axis direction by ΔX. In this state, the distance between the rotation center 106M of the disk 106 and the rotation center 108A of the link 108 changes to √ (Xa2 ² + Za2 ² ) (Xa1 <Xa2 = Xa1 + ΔX, Za1 = Za2), and the connecting rod 113 And the link 108 change to βa2 (> βa1), and the rocking angle of the grindstone 110 changes from θa1 to θa2.

As described above, when the inclination angle of the grindstone 110 is adjusted, the angle between the connecting rod 113 and the link 108 is changed by changing the distance between the rotation center 106M of the disk 106 and the rotation center 108A of the link 108. If it changes from βa1 to βa2, the ideal angle with less vibration cannot be maintained, and the vibration at the time of swinging increases, which hinders speeding up.
Furthermore, since the rocking angle of the grindstone 110 changes from θa1 to θa2, the ideal shape of the bearing raceway surface may be destroyed.
Further, since the feeding device 115 can displace the rocking device 107 only in the X-axis direction, there is a limitation on the groove center angle αa that corresponds to the inclination angle of the grindstone 110.

  The present invention has been made in view of the above-described problems, and its purpose is a super-finishing apparatus that does not require manual adjustment of the angle even when the inclination angle of the grindstone with respect to the bearing raceway surface is changed. Is to provide.

The above object of the present invention can be achieved by the following constitution.
(1) A spindle head that grips a substantially cylindrical bearing inner ring or a bearing outer ring extending in the first axis direction and rotationally drives around the first axis;
A grindstone holder that holds a grindstone and presses against a bearing raceway surface of the bearing inner ring or the bearing outer ring,
A rocking device that supports the grindstone holder and can rock in the first axial direction;
A driving device for driving the rocking device;
With
The drive device extends in a second axis direction perpendicular to the first axis direction and is rotatable around the second axis, and outputs an output unit for outputting the rotational power. The output unit is eccentric from a rotation center. An output side coupling member that is rotatably connected to the position, the swing device extending in the second axis direction and swingable in the first axis direction, and an output portion of the drive device And an input side connecting member connected to the input unit,
The output finishing connecting member and the input connecting member are connected to each other, thereby converting the rotational motion of the output portion into the swing motion of the input portion,
The output unit and the input unit are movable relative to each other in the first axis direction and a third axis direction perpendicular to the first axis direction and the second axis direction. Finishing equipment.
(2) When superfinishing is performed on the bearing raceways having different groove center angles.
The grindstone is pressed against the bearing raceway surface such that the inclination angle of the grindstone with respect to the bearing raceway surface is substantially equal to the inclination of the groove center angle of the bearing raceway surface, and the rotation center of the output unit, The output unit and the input unit are arranged in the first axis direction and the third axis so that a distance in a plane parallel to the first axis direction and the third axis direction from the rotation center of the input unit is constant. The superfinishing apparatus according to (1), wherein the superfinishing apparatus is relatively moved in a direction.
Here, the groove center angle is a bisection of a circular arc having a groove shape appearing in an axial plane (a plane including the central axis) of the bearing inner ring or the bearing outer ring, and a straight line intersecting the arc perpendicularly to the bearing inner ring or It is an angle between the radial direction of the bearing outer ring. For example, in the case of a deep groove ball bearing, the groove center angle is 0 °.
(3) The output unit can be displaced in the first axial direction by a first axial drive device and can be displaced in the third axial direction by a third axial drive device ( The superfinishing apparatus according to 1) or (2).
(4) The output unit is supported eccentrically from the rotation center of the swirl plate by a swirl plate that can rotate coaxially with the input unit, and is displaced around the rotation center of the swirl plate by the rotation of the swivel plate. The superfinishing apparatus according to (1) or (2), which is possible.

  According to the superfinishing apparatus of the present invention, the output portion and the input portion can be moved relative to each other in the first axis direction and the third axis direction. Can be set. Therefore, even when the inclination angle of the grindstone with respect to the bearing raceway surface is changed, it can be automatically performed without performing the manual adjustment operation of the inclination angle, and high speed can be realized.

In addition, when superfinishing is performed on bearing raceway surfaces with different inclinations of the groove center angle, the grinding stone is adjusted so that the inclination angle of the grinding wheel with respect to the bearing raceway surface is substantially equal to the inclination of the groove center angle of the bearing raceway surface. The output unit and the input are pressed so that the distance between the rotation center of the output unit and the rotation center of the input unit in a plane parallel to the first axis direction and the third axis direction is constant. The part was moved relative to the first axis direction and the third axis direction.
Therefore, even when the inclination angle of the grindstone is changed so as to correspond to the inclination of the groove center angle, the angle formed by the output side connecting member and the input side connecting member can be maintained constant, The angle can be maintained at an ideal angle with less vibration.
Furthermore, even when the inclination angle of the grindstone is changed so as to correspond to the inclination of the groove center angle, the rocking angle of the grindstone can be made constant, so that accurate processing is performed on the bearing raceway surface. Can be applied.

1 is a perspective view of a superfinishing apparatus according to a first embodiment of the present invention. It is sectional drawing which shows a mode that a grindstone presses a bearing raceway surface, (a) is a figure which shows the bearing outer ring | wheel for deep groove ball bearings, (b) shows the bearing outer ring | wheel for angular ball bearings. It is a schematic sectional drawing which shows a connection arm and a connection rod, (a) is a figure which shows the state in Fig.2 (a), (b) is a figure which shows the state in FIG.2 (b). It is a schematic sectional drawing which shows a connection arm and a connection rod. It is a schematic sectional drawing which shows a connection arm and a connection rod. It is a top view of the superfinishing apparatus concerning a 2nd embodiment of the present invention. It is sectional drawing which shows a mode that a grindstone presses a bearing raceway surface, (a) is a figure which shows the bearing inner ring | wheel for deep groove ball bearings, (b) shows the bearing inner ring | wheel for angular ball bearings. It is sectional drawing which shows a mode that a grindstone presses a double-row bearing raceway surface. It is a perspective view of the conventional superfinishing apparatus. It is operation | movement explanatory drawing of the conventional superfinishing apparatus, (a) is sectional drawing which shows a link and a connecting rod, (b) is sectional drawing which shows a grindstone and a bearing raceway surface. It is operation | movement explanatory drawing of the conventional superfinishing apparatus, (a) is sectional drawing which shows a link and a connecting rod, (b) is sectional drawing which shows a grindstone and a bearing raceway surface. It is a schematic sectional drawing which shows a link and connecting, (a) is a state in which the grindstone is not inclined with respect to a bearing raceway surface, (b) is a figure which shows the state in which the grindstone was inclined only (alpha) a with respect to the bearing raceway surface. It is.

Hereinafter, embodiments of the superfinishing apparatus according to the present invention will be described in detail with reference to the drawings.
(First embodiment)

  As shown in FIGS. 1 and 2 (a), the superfinishing apparatus 1 according to the first embodiment of the present invention has a substantially cylindrical bearing outer ring extending in the X-axis (first axis) direction (parallel to the ground). A spindle head (not shown) that grips 10 and rotates around the X axis and a grindstone 3 are held, and a bearing raceway surface 12 of the bearing outer ring 10 is Z-axis (third axis) direction (perpendicular to the ground). A grindstone holder 20 that is pressed from above, a rocking device 30 that supports the grindstone holder 20 and can rock in the X-axis direction, and a drive device 40 that drives the rocking device 30. For the sake of explanation, the bearing outer ring 10 is illustrated in FIG. 2A as a bearing outer ring for a deep groove ball bearing. However, the type of the bearing outer ring to which the super finishing device 1 is applied is not limited. Absent.

  The oscillating device 30 supports the grindstone holder 20 on one side surface in the Y-axis (second axis) direction perpendicular to the X-axis direction and the Z-axis direction, and the power of the driving device 40 is input from the other side surface in the opposite Y-axis direction. An oscillation spindle 37 as an input portion to be input, and a support member 38 that supports the side surface of the oscillation spindle 37 in the X-axis direction. The oscillation spindle 37 is arranged so that a spindle shaft (not shown) extends in the Y direction, and the support member 38 is installed on the Z axis guide rail 32 extending in the Z axis direction, and drives the motor 34. As a result, the pulleys 34A and 34B over which a belt (not shown) is stretched, and the support member 38 (swing device 30) are attached to the Z-axis guide rail 32 via a ball screw (not shown) fixed to one end of the pulley 34B. It is possible to slide and displace in the Z-axis direction above.

  The Z-axis guide rail 32 is disposed on the side surface in the X-axis direction of the base material 31 extending in the Z-axis direction, and the base material 31 is provided on the upper surface of the flat base 35. The lower portion of the base 35 is supported by an X-axis guide rail 36 extending in the X-axis direction, and the base 35 can be slid in the X-axis direction by driving a motor (not shown). .

  The drive device 40 includes an oscillation motor 41 that extends in the Y-axis direction, and an intermediate shaft spindle 42 that is disposed below the oscillation motor 41 in the Z-axis direction, and a spindle shaft (not shown) extends in the Y-axis direction. Yes. A belt (not shown) is wound around the pulley 41A of the oscillation motor 41 and the pulley 42A of the intermediate shaft spindle 42, and extends to the intermediate shaft spindle 42 in the Y-axis direction by the driving force of the oscillation motor 41. A spindle shaft (not shown) arranged in this manner is rotationally driven around the Y axis. The intermediate shaft spindle 42 serves as an output unit that outputs rotational power to the oscillation spindle 37 via a connecting rod 49 and a connecting arm 39 described later.

  The oscillation motor 41 and the intermediate shaft spindle 42 are installed on a Z-axis guide rail 43 extending in the Z-axis direction. By driving the motor 44, pulleys 44A and 44B around which a belt (not shown) is stretched. In addition, the oscillation motor 41 and the intermediate shaft spindle 42 can be slid in the Z-axis direction on the Z-axis guide rail 43 via a ball screw (not shown) with the pulley 44B fixed to one end. Thus, the Z-axis guide rail 43 and the motor 44 constitute a Z-axis direction drive device (third axis direction drive device) that can displace the intermediate shaft spindle 42 in the Z-axis direction.

  The Z-axis guide rail 43 is disposed on the side surface in the X-axis direction of the base material 45 extending in the Z-axis direction, and the base material 45 is provided on the upper surface of the flat base 46. The base 46 is supported by an X-axis guide rail 47 fixed on the base 35 so that a lower portion thereof extends in the X-axis direction. By driving a motor 48, the base 46 is slid in the X-axis direction. It can be displaced. Therefore, by displacing the base 46 in the X-axis direction, the base material 45, the Z-axis guide rail 43, the oscillation motor 41, and the intermediate shaft spindle 42 can be integrally displaced in the X-axis direction. Thus, the X-axis guide rail 47 and the motor 48 constitute an X-axis direction driving device (first axial direction driving device) that can displace the intermediate shaft spindle 42 in the X-axis direction.

  As described above, the oscillation spindle 37 and the intermediate spindle 42 of the superfinishing apparatus 1 of the present embodiment can be moved relative to each other in the X-axis direction and the Z-axis direction.

  Further, the drive device 40 has a connecting rod 49 as an output side connecting member that is rotatably connected to the Y axis direction side surface of the intermediate shaft spindle 42 at a position eccentric from the rotation center by an eccentric amount e. The rod 49 is formed in a substantially rectangular parallelepiped shape extending in the XZ plane. The oscillating device 30 has a connecting arm 39 as an input side connecting member that is rotatably connected to the other side surface of the oscillation spindle 37 in the Y-axis direction and is formed in a substantially rectangular parallelepiped shape extending in the XZ plane. And the front-end | tip part of these connection rods 49 and the front-end | tip part of the connection arm 39 are connected so that relative rotation is mutually possible. Therefore, when the oscillation motor 41 is driven to rotate, the rotational movement of the intermediate spindle 42 moves in the X-axis direction (more precisely around the Y-axis) of the oscillation spindle 37 via the connecting rod 49 and the connecting arm 39. The grindstone 3 that is converted into a rocking motion and supported by the grindstone holder 20 also rocks at an arbitrary rocking angle θ.

A method for continuously superfinishing the bearing raceway surface 12 having different inclinations of the groove center angle α by the superfinishing apparatus 1 configured as described above will be described below.
As shown in FIGS. 2 (a) and 3 (a), after superfinishing is performed on the bearing raceway surface 12 of the bearing outer ring 10 for the deep groove ball bearing, as shown in FIGS. 2 (b) and 3 (b). Consider a case in which superfinishing is performed on the bearing raceway surface 12 of the outer ring 10 for the angular ball bearing. 3 (a) and 3 (b), the left-side circular one-dot chain line is a locus of the connection position between the intermediate shaft spindle 42 and the connecting rod 49 during rotation, and is a circular shape having a right radius R. A part of the broken line is a locus of a connecting position between the connecting rod 49 and the connecting arm 39.

First, as shown in FIGS. 2 (a) and 3 (a), by driving the motors 44 and 48, as shown in FIGS. 2 (a) and 3 (a), it matches the inclination of the groove center angle α1 (= 0) of the bearing raceway surface 12. The drive device 40 is displaced in the X-axis direction and the Z-axis direction so as to be parallel to the Z-axis and swing symmetrically with respect to the center line M of the swing angle θ1. Next, by driving a motor (not shown) that drives the base 35 and the motors 34 and 44, the driving device 40 and the rocking device 30 are integrally displaced in the X-axis direction and the Z-axis direction, whereby the grindstone holder 20 ( As shown in FIG. 2A, the grindstone 3) is positioned, and the grindstone 3 is pressed against the bearing raceway surface 12, and the grindstone 3 is swung at the rocking angle θ1 while rotating the bearing outer ring 10 around the X axis. By moving, the bearing raceway surface 12 is superfinished. The swing center O at this time substantially coincides with the center of curvature of the bearing raceway surface 12. The angle formed by the connecting rod 49 and the connecting arm 39 is β1 (≦ 180 °), and the distance in the XZ plane between the rotation center 42M of the intermediate spindle 42 and the rotation center 37M of the oscillation spindle 37 is √ (X1 ² + Z1 ² ).

Next, as shown in FIGS. 2B and 3B, the drive device 40 is adjusted so that the inclination of the groove center angle α2 of the bearing raceway surface 12 and the inclination angle of the grindstone 3 with respect to the bearing raceway surface 12 coincide. The position of the intermediate spindle 42 is adjusted by displacing in the X-axis direction and the Z-axis direction. At this time, in the superfinishing apparatus 1 of the present invention, the distance √ (X2 ² + Z2 ² ) in the XZ plane between the rotation center 42M of the intermediate spindle 42 and the rotation center 37M of the oscillation spindle 37 is as shown in FIG. It is automatically controlled to be equal to the distance √ (X1 ² + Z1 ² ) in the state 3 (a). That is, it is automatically controlled so that the rotation center 42M of the intermediate shaft spindle 42 is always on the circumference of the radius √ (X1 ² + Z1 ² ) centered on the rotation center 37M of the oscillation spindle 37 at least when positioning is completed. The Therefore, even when the inclination angle of the grindstone 3 is changed so as to correspond to the inclination of the groove center angle (α1 → α2), the angle formed by the connecting rod 49 and the connecting arm 39 is kept constant (β1 = β2), and the rocking angle of the grindstone 3 can be constant (θ1 = θ2).

The angle β (≦ 180 °) formed by the connecting rod 49 and the connecting arm 39 satisfies βb <β <βa based on conditions such as the value of the swing angle θ and the dimensions of the connecting rod 49 and the connecting arm 39. By setting as described above, generation of vibration can be suppressed.
In the case of this embodiment, for example, when the swing angle θ is set to 40 °, as shown in FIG. 4, when the acute angle β formed by the connecting rod 49 and the connecting arm 39 is 50 ° or less, the vibration is large. 5 (βb = 50), as shown in FIG. 5, it has been experimentally known that the vibration increases when the obtuse angle β formed by the connecting rod 49 and the connecting arm 39 is 145 ° or more. Therefore, in this example, β may be set so as to satisfy 50 ° <β <145 °. Thereafter, the grindstone 3 is positioned, pressed against the bearing raceway surface 12, and superfinishing is performed in the same manner as above.

  As described above, according to the superfinishing apparatus 1 of the present embodiment, since the swing device 30 and the drive device 40 are configured to be displaceable in the X-axis direction and the Z-axis direction, Since the rotation spindle 37 can be moved relative to each other in the X-axis direction and the Z-axis direction, an angle to be inclined with respect to the bearing raceway surface 12 of the grindstone 3 can be arbitrarily set. Therefore, even when the inclination angle of the grindstone 3 with respect to the bearing raceway surface 12 is changed, it can be automatically performed without performing manual adjustment work of the angle, and high speed can be realized.

Further, when superfinishing is performed on the bearing raceway surface 12 having a different inclination of the groove center angle α, the inclination angle of the grindstone 3 with respect to the bearing raceway surface 12 is substantially equal to the inclination of the groove center angle α of the bearing raceway surface 12. In this way, the grindstone 3 is pressed against the bearing raceway surface 12, and the plane parallel to the X-axis direction and the Z-axis direction of the rotation center 42M of the intermediate spindle 42 and the rotation center 37M of the oscillation spindle 37 ( The intermediate spindle 42 and the oscillation spindle 37 are relatively moved in the X-axis direction and the Z-axis direction so that the distance in the (XZ plane) is constant.
Therefore, even when the inclination angle of the grindstone 3 is changed so as to correspond to the inclination of the groove center angle α, the angle β formed by the connecting rod 49 and the connecting arm 39 can be kept constant. Therefore, the angle β can be maintained at an ideal angle with less vibration.
Further, even when the inclination angle of the grindstone 3 is changed so as to correspond to the inclination of the groove center angle α, the rocking angle θ of the grindstone 3 can be made constant, so Accurate processing can be performed.

  Next, a superfinishing apparatus according to the second embodiment of the present invention will be described. Compared with the superfinishing device of the first embodiment, the superfinishing device of this embodiment displaces the intermediate shaft spindle 42 in the Z-axis direction for relative movement between the intermediate shaft spindle 42 and the oscillation spindle 37. A Z-axis direction driving device (Z-axis guide rail 43 and motor 44), and an X-axis direction driving device (X-axis guide rail 47 and motor 48) capable of displacing the intermediate shaft spindle 42 in the X-axis direction. It is different in that it is not. Although not shown in the drawings, the superfinishing apparatus of the present embodiment includes a Z-axis direction driving device that can integrally displace the oscillation spindle 37 and the intermediate shaft spindle 42 in the Z-axis direction, and the oscillation spindle 37 and the intermediate shaft spindle. And an X-axis direction driving device capable of integrally displacing 42 in the X-axis direction.

  As shown in FIG. 6, the drive device 40 of this embodiment includes a drive motor 55, a drive gear 51 connected to the Y-axis direction side of the drive motor 55 and rotating integrally, and a driven gear meshing with the drive gear 51. 53A is formed on the outer periphery, and is a substantially disc-shaped turning plate 53 that is rotatable around the Y axis, and an intermediate shaft spindle 42 that is supported by the turning plate 53 eccentrically in the X axis direction and the Z axis direction from the rotation center 53M. And having.

  Here, the rotation center 53M of the swivel plate 53 and the rotation center 37M of the oscillation spindle 37 are arranged coaxially. Therefore, when the turning plate 53 is rotated by rotating the drive motor 55, the intermediate shaft spindle 42 rotates (revolves) around the rotation center 53M of the turning plate 53 (the rotation center 37M of the oscillation spindle 37). It will be.

  The intermediate shaft spindle 42 can be rotated (rotated) by an oscillation motor (not shown), and the rotational movement of the intermediate shaft spindle 42 is performed in the X-axis direction of the oscillation spindle 37 via the connecting rod 49 and the connecting arm 39. The wobblestone 3 is swung by the wobblestone holder 20 which is converted into the wobbling movement of the whetstone.

  When continuously superfinishing the bearing raceway surface 12 with different inclinations of the groove center angle α using the superfinishing apparatus 1 configured as described above, the intermediate shaft spindle is rotated by rotating the turning plate 53. 42 is displaced with respect to the oscillation spindle 37 in the XZ plane, and the inclination angle of the grindstone 3 with respect to the bearing raceway surface 12 is automatically adjusted so as to be substantially equal to the inclination of the groove center angle α of the bearing raceway surface 12. Here, as described above, the rotation center 53M of the swivel plate 53 and the rotation center 37M of the oscillation spindle 37 are arranged coaxially. Therefore, when the swivel plate 53 is rotated, the intermediate shaft spindle 42 is Then, it rotates (revolves) around the rotation center 53M of the swivel plate 53 (the rotation center 37M of the oscillation spindle 37). Therefore, even when the turning plate 53 is rotated to adjust the inclination angle of the grindstone 3 with respect to the bearing raceway surface 12, the rotation center 42M of the intermediate shaft spindle 42, the rotation center 37M of the oscillation spindle 37, The distance in the XZ plane is always constant.

Therefore, even in the superfinishing apparatus 1 of the present embodiment, as in the first embodiment, even when the inclination angle of the grindstone 3 is changed so as to correspond to the inclination of the groove center angle α, Since the angle β formed by the connecting arm 39 can be maintained constant, the angle β can be maintained at an ideal angle with less vibration.
Further, even when the inclination angle of the grindstone 3 is changed so as to correspond to the inclination of the groove center angle α, the rocking angle θ of the grindstone 3 can be made constant, so Accurate processing can be performed.

In addition, this invention is not limited to each embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably.
For example, the superfinishing apparatus 1 of the present invention has a grindstone that is substantially equal to the groove center angle α2 of the bearing raceway surface 16 when superfinishing the bearing raceway surface 16 of the bearing inner ring 15 as shown in FIG. Even when the inclination angle of the third bearing raceway surface 16 is changed, the same method as in the above-described embodiment can be applied.

Further, as shown in FIG. 8, the superfinishing apparatus 1 of the present invention can also be used when superfinishing a bearing inner ring 15 having double-row bearing raceways 16a and 16b.
More specifically, first, the groove center angle α1 of the bearing raceway surface 16a and the inclination angle of the grindstone 3 are pressed against one of the bearing raceway surfaces 16a, and the bearing inner ring 15 is rotated. Superfinishing is performed by swinging the grindstone 3 at a constant swing angle θ1 (not shown).
After the super finishing of the bearing raceway surface 16a is completed, the grindstone 3 (grindstone holder 20) is retracted from the bearing raceway surface 16a by displacing the rocking device 30 in the X-axis direction and the Z-axis direction. Next, by moving the driving device 40 in the X-axis direction and the Z-axis direction, the grindstone 3 is inclined so as to be substantially equal to the inclination of the groove center angle α2 of the other bearing raceway surface 16b, and the rocking device 30 is further moved. Is moved in the X-axis direction and the Z-axis direction to press the grindstone 3 against the bearing raceway surface 16b, and while rotating the bearing inner ring 15, the grindstone 3 is swung at a constant rocking angle θ2 (not shown). By super-finishing.
At this time, as in the above-described embodiment, the distance in the XZ plane between the rotation center 42M of the intermediate shaft spindle 42 and the rotation center 37M of the oscillation spindle 37 is larger than which of the bearing raceway surfaces 16a and 16b. Since it is controlled so as to be constant when finishing, even if the inclination angle of the grindstone 3 is changed to correspond to the inclination of the groove center angle (α1 → α2), the connecting rod 49 and The angle formed by the connecting arm 39 can be kept constant (β1 = β2), and the rocking angle of the grindstone 3 can be made constant (θ1 = θ2).

  In the above-described embodiment, the positioning of the grindstone 3 with respect to the bearing raceway surface 12 of the bearing outer ring 10 is performed by displacing the grindstone holder 20 by displacing the driving device 40 and the swing device 30 in the X-axis direction and the Z-axis direction. However, the present invention is not limited to this configuration, and the bearing outer ring 10 can be moved in the X-axis direction and the Z-axis direction by moving a spindle head (not shown) that holds the bearing outer ring 10 or the bearing inner ring. Or you may make it carry out by displacing a bearing inner ring | wheel.

DESCRIPTION OF SYMBOLS 1 Super finishing device 3 Grinding wheel 10 Bearing outer ring 12 Bearing raceway surface 15 Bearing inner ring 16, 16a, 16b Bearing raceway surface 20 Grinding stone holder 30 Oscillator 31 Base material 32 Z-axis guide rail 34 Motor 34A Pulley 34B Pulley 35 Base 36 X-axis Guide rail 37 Oscillation spindle (input section)
37M Center of rotation 38 Support member 39 Connecting arm (input side connecting member)
40 Drive device 41 Oscillation motor 41A Pulley 42 Intermediate shaft spindle (output unit)
42A Pulley 42M Center of rotation 43 Z-axis guide rail 44 Motor 44A Pulley 44B Pulley 45 Base material 46 Base 47 X-axis guide rail 48 Motor 49 Connecting rod (output-side connecting member)
53 Rotating plate 53A Driven gear 55 Drive motor M Center line O Oscillation center θ, θ1, θ2 Oscillation angles α, α1, α2 Groove center angle

Claims (4)

A spindle head that grips a substantially cylindrical bearing inner ring or a bearing outer ring extending in the first axial direction, and rotates around the first axis;
A grindstone holder that holds a grindstone and presses against a bearing raceway surface of the bearing inner ring or the bearing outer ring,
A rocking device that supports the grindstone holder and can rock in the first axial direction;
A driving device for driving the rocking device;
With
The drive device extends in a second axis direction perpendicular to the first axis direction and is rotatable around the second axis, and outputs an output unit for outputting the rotational power. The output unit is eccentric from a rotation center. An output side coupling member that is rotatably connected to the position, the swing device extending in the second axis direction and swingable in the first axis direction, and an output portion of the drive device And an input side connecting member connected to the input unit,
The output finishing connecting member and the input connecting member are connected to each other, thereby converting the rotational motion of the output portion into the swing motion of the input portion,
The output unit and the input unit are movable relative to each other in the first axis direction and a third axis direction perpendicular to the first axis direction and the second axis direction. Finishing equipment. When superfinishing is performed on the bearing raceway surfaces with different groove center angle inclinations,
The grindstone is pressed against the bearing raceway surface such that the inclination angle of the grindstone with respect to the bearing raceway surface is substantially equal to the inclination of the groove center angle of the bearing raceway surface, and the rotation center of the output unit, The output unit and the input unit are arranged in the first axis direction and the third axis so that a distance in a plane parallel to the first axis direction and the third axis direction from the rotation center of the input unit is constant. The superfinishing apparatus according to claim 1, wherein the superfinishing apparatus is relatively moved in a direction.   The output unit can be displaced in the first axial direction by a first axial driving device and can be displaced in the third axial direction by a third axial driving device. 2. The superfinishing apparatus according to 2.   The output portion is supported eccentrically from the rotation center of the swivel plate by a swivel plate that can rotate coaxially with the input unit, and can be displaced around the rotation center of the swirl plate by the rotation of the swivel plate. The superfinishing apparatus according to claim 1 or 2, characterized in that

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