JP5968181B2 - Rolling bearing polishing equipment - Google Patents

Description

  The present invention relates to a rolling bearing polishing apparatus.

  The rolling bearing includes a groove-shaped rolling surface into which a rolling element is fitted so as to roll freely on the outer circumferential surface of the inner ring and the inner circumferential surface of the outer ring. The inner ring and the outer ring are formed by being subjected to super-finishing by polishing the rolling surfaces after being subjected to cutting, heat treatment, rough finishing, or the like.

A polishing apparatus for a rolling bearing for super-finishing a rolling surface includes a super-finishing grindstone formed of fine particles and a grindstone holder for holding the grindstone (corresponding to “grinding stone holder” in claims). And a grindstone pressure lever (corresponding to a “pusher jig” in claims) connected to the grindstone and pressurizing the grindstone (see, for example, Patent Document 1).
Super-finishing of the rolling surface is performed by rotating the workpiece, which is an inner ring or outer ring, around the center axis of the workpiece, while pressing the tip of the grinding wheel against the rolling surface of the workpiece with the grinding wheel pressure lever, This is performed by grinding the grindstone together with the grinding wheel pressure lever so as to swing along the rolling surface.

  Generally, the grindstone holder is formed with an insertion hole through which the grindstone is inserted, and the grindstone is held movably along the axis of the insertion hole. Further, for example, a resin member is provided at the base end portion of the grindstone, and the base end portion of the grindstone and the grindstone pressure lever penetrate between the resin member at the base end portion of the grindstone and the grindstone pressure lever. Are attached to each other by the surface tension (interfacial tension) of the cutting oil.

  By the way, when the workpiece is moved and exchanged after the superfinishing process is finished, the moving workpiece and the grindstone come into contact with each other, so that the grindstone may be damaged or dropped off. Therefore, by moving the grinding wheel pressure lever and the grinding wheel connected to the grinding wheel pressure lever in the direction away from the workpiece, and ensuring a sufficient separation distance between the workpiece and the grinding stone, the workpiece is moved and replaced, thereby moving the grinding wheel. This prevents the grinding stone from being damaged and falling off by preventing contact with the workpiece.

JP 2004-130457 A

However, the conventional rolling bearing polishing apparatus has room for improvement in the following points.
In conventional rolling bearing polishing equipment, if the cutting oil does not penetrate sufficiently between the base end of the grinding wheel and the pusher jig, or wear powder generated during super-finishing of the rolling surface, etc. However, the surface tension of the cutting oil cannot be sufficiently obtained when the steel enters between the base end of the grindstone and the pusher jig. For this reason, when the pusher jig moves the grindstone in a direction away from the workpiece, the connection between the base end of the grindstone and the pusher jig may be released and the grindstone may not move. Therefore, a sufficient separation distance between the workpiece and the grindstone cannot be ensured, and the workpiece and the grindstone may come into contact with each other when the workpiece is replaced, and the grindstone may be damaged or dropped off.

  On the other hand, it is conceivable to firmly fix the grindstone and the pusher jig so that they cannot be moved relative to each other, thereby preventing the connection between the grindstone and the pusher jig from being released. However, manufacturing errors such as the pusher jig cannot be absorbed between the grindstone and the pusher jig, and the grindstone may move in an inclined state in the insertion hole of the grindstone holder. As a result, the grindstone comes into contact with the inner peripheral surface of the insertion hole of the grindstone holder in an inclined state, so that the grindstone retainer wears out and a deviation occurs in the grindstone holding position, and the rolling surface is superfinished with high accuracy. It may not be possible.

  Accordingly, an object of the present invention is to provide a rolling bearing polishing apparatus that can prevent the grinding stone from being damaged or dropped off when the workpiece is replaced, and can hold the grinding stone with high accuracy by suppressing the wear of the grinding wheel holder.

  In order to solve the above-described problems, a rolling bearing polishing apparatus according to the present invention includes an inner ring, an outer ring surrounding the inner ring, and a plurality of rolling elements that are rotatably held between the inner ring and the outer ring. A rolling bearing polishing apparatus for superfinishing the rolling surface of the rolling bearing, comprising: a rolling surface formed on an outer peripheral surface of the inner ring and an inner peripheral surface of the outer ring, and the rolling element is fitted into the rolling ring. The grindstone is in contact with the inner ring or the outer ring, which is a workpiece, and grinds the rolling surface to perform superfinishing, and the grindstone is inserted along a first direction perpendicular to the central axis of the workpiece. A grindstone holder provided with a possible insertion hole, and movably holding the grindstone along the first direction, and extending along a second direction orthogonal to the first direction, The end is connected and the grindstone is along the first direction. And a pusher jig that contacts or separates the grindstone from the rolling surface, and a base end portion of the grindstone is disposed in the first direction and the first direction with respect to the pusher jig. It is characterized by being connected so as to be rotatable about an axis along a third direction orthogonal to the two directions.

According to the present invention, the base end portion of the grindstone is connected to the pusher jig so as to be rotatable around an axis line along the third direction, so that the grindstone is reliably separated from the work when the work is replaced. It is possible to prevent the grindstone and the workpiece from contacting each other during workpiece exchange.
Further, even when the pusher jig is displaced due to an attachment error, a manufacturing error, or the like, the base end portion of the grindstone can be rotated to absorb the displacement of the pusher jig, thereby preventing the grinder from being displaced. Thereby, since the grindstone can be moved along the first direction and the grindstone can be brought into contact with and separated from the workpiece, the grindstone comes into contact with the inner peripheral surface of the insertion hole of the grindstone holder in a tilted state. Can be prevented.
Therefore, it is possible to prevent the grinding stone from being damaged or dropped off when the workpiece is replaced, and it is possible to hold the grinding stone with high accuracy by suppressing the wear of the grinding stone holder.

  A convex portion is formed on one of the base end portion of the grindstone and the pusher jig, and the convex portion is fitted on either one of the base end portion of the grindstone and the pusher jig. A concave portion is formed, and the base end portion of the grindstone and the pusher jig are connected by fitting the convex portion and the concave portion, and a side surface that intersects the second direction of the convex portion; A gap is provided between a side surface of the recess that intersects the second direction.

According to the present invention, since the base end portion of the grindstone and the pusher jig are connected by fitting the convex portion and the concave portion, the connection between the grindstone and the pusher jig is released as compared with the prior art. Can be suppressed. Therefore, since the grindstone can be reliably separated from the workpiece, it is possible to prevent the grindstone from being damaged or dropped when the workpiece is replaced.
In addition, since a gap is provided between the side surface that intersects the second direction of the convex portion and the side surface that intersects the second direction of the concave portion, the base end portion of the grindstone is easily centered about the axis line along the third direction. Can be rotated. Therefore, it is possible to hold the grindstone with high accuracy by reliably suppressing the wear of the grindstone holder.
Further, the base end portion of the grindstone and the pusher jig can be easily attached and detached simply by fitting and releasing the convex portion and the concave portion. Therefore, the rolling bearing polishing apparatus can be easily maintained.

  Further, the base end portion of the grindstone and the pusher jig are connected by a pin member provided along the third direction.

  According to the present invention, the base end portion of the grindstone and the pusher jig are reliably connected by the pin member, and the base end portion of the grindstone can be easily rotated around the central axis of the pin member. Therefore, the grindstone can be separated from the work to reliably prevent the grindstone from being damaged or dropped when the work is replaced, and the grindstone can be held with high accuracy by further suppressing wear of the grindstone holder.

  Further, an engagement claw portion is formed on one of the base end portion of the grindstone and the pusher jig, and the engagement claw is formed on the other end of the base end portion of the grindstone and the pusher jig. An engagement recess that can be engaged with the portion is formed, and the proximal end portion of the grindstone and the pusher jig are connected by engagement of the engagement claw portion and the engagement recess. It is a feature.

  According to the present invention, the base end portion of the grindstone and the pusher jig can be easily attached and detached simply by engaging and releasing the engaging claw portion and the engaging concave portion. Therefore, the rolling bearing polishing apparatus can be easily maintained.

  Further, an intermediate member is provided between the base end portion of the grindstone and the pusher jig, and the base end portion of the grindstone and the pusher jig are connected via the intermediate member. It is characterized by.

  According to the present invention, various grinding wheels and pusher jigs can be handled by appropriately changing the shape of the intermediate member. In particular, since it is difficult to process the grindstone into a complicated shape, it is suitable when the shape of the intermediate member is appropriately changed without processing the grindstone to correspond to the shapes of various grindstones and pusher jigs. .

  Further, the base end portion of the grindstone and the pusher jig are connected by magnetic force.

  According to the present invention, the base end portion of the grindstone and the pusher jig can be easily attached and detached. Therefore, the rolling bearing polishing apparatus can be easily maintained.

  Further, a resin member is provided at a base end portion of the grindstone.

  According to the present invention, since the resin member can be easily injection-molded with a complicated shape, the shape of the base end portion of the grindstone corresponding to the pusher jig can be appropriately formed.

According to the present invention, the base end portion of the grindstone is connected to the pusher jig so as to be rotatable around an axis line along the third direction, so that the grindstone is reliably separated from the work when the work is replaced. It is possible to prevent the grindstone and the workpiece from contacting each other during workpiece exchange.
Further, even when the pusher jig is displaced due to an attachment error, a manufacturing error, or the like, the base end portion of the grindstone can be rotated to absorb the displacement of the pusher jig, thereby preventing the grinder from being displaced. Thereby, since the grindstone can be moved along the first direction and the grindstone can be brought into contact with and separated from the workpiece, the grindstone comes into contact with the inner peripheral surface of the insertion hole of the grindstone holder in a tilted state. Can be prevented.
Therefore, it is possible to prevent the grinding stone from being damaged or dropped off when the workpiece is replaced, and it is possible to hold the grinding stone with high accuracy by suppressing the wear of the grinding stone holder.

1 is a perspective view of an information recording / reproducing apparatus according to an embodiment. It is side surface sectional drawing of the bearing apparatus which concerns on embodiment. It is a whole schematic diagram of the grinding device of a rolling bearing concerning a first embodiment, Drawing 3 (a) is a front view, and Drawing 3 (b) is a side view. It is a perspective view of the grinding | polishing apparatus of the rolling bearing which concerns on 1st embodiment. It is a top view of the grinding | polishing apparatus of the rolling bearing which concerns on 1st embodiment. It is sectional drawing along the AA line of FIG. It is sectional drawing along the BB line of FIG. It is a top view of the grinding | polishing apparatus of the rolling bearing which concerns on the modification of 1st embodiment. It is a top view of the grinding | polishing apparatus of the rolling bearing which concerns on 2nd embodiment. It is sectional drawing along CC line of FIG. It is a top view of the grinding | polishing apparatus of the rolling bearing which concerns on 3rd embodiment. It is a top view of the grinding | polishing apparatus of the rolling bearing which concerns on 4th embodiment. It is a perspective view of an intermediate member. It is a top view of the grinding | polishing apparatus of the rolling bearing which concerns on 5th embodiment. It is a top view of the grinding | polishing apparatus of the rolling bearing which concerns on the modification of 5th embodiment.

  The rolling bearing polishing apparatus according to the first embodiment will be described below. Below, after explaining the information recording / reproducing apparatus provided with the rolling bearing which concerns on embodiment, and the bearing apparatus provided with the rolling bearing, the grinding | polishing apparatus of the rolling bearing which concerns on 1st embodiment is demonstrated.

(Information recording / reproducing device)
FIG. 1 is a perspective view of an information recording / reproducing apparatus 1 according to the embodiment.
As shown in FIG. 1, the information recording / reproducing apparatus 1 is an apparatus that writes and reads data on a disk (magnetic recording medium) D having a recording layer. The information recording / reproducing apparatus 1 includes an arm (rotating member) 8, a head gimbal assembly 4 supported on the tip side of the arm 8, a slider 2 attached to the tip of the head gimbal assembly 4, and a head gimbal assembly 4. An actuator (VCM: voice coil motor) 6 for moving the scan, a spindle motor 7 for rotating the disk D, a control unit 5 for supplying a current modulated in accordance with information to the slider 2, and these components are housed inside. And a housing 9 to be provided.

  The housing 9 is made of a metal material such as aluminum, iron, or stainless steel, and has a box shape with an opening at the top. The housing 9 stands vertically from the rectangular bottom 9a and the peripheral edge of the bottom 9a. It is comprised with the surrounding wall (not shown) provided. A housing recess for housing each of the above-described components is formed inside the housing 9 surrounded by the peripheral wall. A spindle motor 7 is attached to substantially the center of the bottom portion 9a, and the disc D is detachably fixed by fitting a center hole into the spindle motor 7.

A bearing device 10 is disposed on the side of the disk D. One end of the bearing device 10 is supported by the bottom 9 a of the housing 9. An arm 8 is fitted and fixed to the outer peripheral surface of the bearing device 10. The base end portion of the arm 8 is connected to the actuator 6 described above. Further, the arm 8 extends in parallel with the surface of the disk D from the proximal end side toward the distal end side.
A head gimbal assembly 4 is connected to the tip of the arm 8. The head gimbal assembly 4 includes a suspension 3 and a slider 2 that is attached to the tip of the suspension 3 and is disposed to face the surface of the disk D. The slider 2 includes a recording element for writing (recording) information on the disk D and a reproducing element for reading (reproducing) information from the disk D.

  In the information recording / reproducing apparatus 1 configured as described above, in order to record or reproduce information, the spindle motor 7 is first driven to rotate the disk D around the central axis L2 of the disk D. Further, the actuator 6 is driven to rotate the arm 8 around the bearing device 10 as the rotation center. As a result, the slider 2 disposed at the tip of the head gimbal assembly 4 can be scanned and moved to each part of the surface of the disk D. Then, by driving the recording element or reproducing element of the slider 2, information can be recorded or reproduced on the disk D.

(Bearing device)
FIG. 2 is a side sectional view of the bearing device 10 according to the embodiment.
As shown in FIG. 2, the bearing device 10 includes a shaft 20 formed in a substantially cylindrical shape, a pair of rolling bearings 11 and 12 arranged side by side in the axial direction of the shaft 20, and a pair of rolling bearings 11 and 12. And a substantially cylindrical sleeve 15 that is externally fitted to the sleeve. The shaft 20, the pair of rolling bearings 11 and 12, and the sleeve 15 are arranged coaxially with respect to the common central axis L1.

  The shaft 20 is a substantially cylindrical rod-like member, and the first rolling bearing 11 is attached to one end side in the longitudinal direction (axial direction), and the second rolling bearing is spaced apart from the first rolling bearing 11 in the axial direction. 12 is mounted. In addition, a flange portion 20 a that is larger in diameter than the diameter of the main body portion of the shaft 20 and is in contact with the first rolling bearing 11 is formed on the end face on one end side of the shaft 20.

The first rolling bearing 11 and the second rolling bearing 12 are bearings formed in the same shape. Accordingly, only the first rolling bearing 11 will be described below, and the description of the second rolling bearing 12 will be omitted.
The first rolling bearing 11 includes an inner ring 11a, an outer ring 11b that is disposed coaxially with the inner ring 11a and surrounds the inner ring 11a, and a plurality of rolling elements that are rotatably held between the inner ring 11a and the outer ring 11b. 11c.
The inner ring 11a of the first rolling bearing 11 is formed with an inner ring rolling surface 11d having an arc-shaped side section that holds the rolling element 11c in a freely rolling manner. The inner ring rolling surface 11d is formed over the entire circumference of the outer circumferential surface of the inner ring 11a.
The outer ring 11b of the first rolling bearing 11 is formed with an outer ring rolling surface 11e having an arc-shaped side section that holds the rolling element 11c in a freely rolling manner so as to face the inner ring rolling surface 11d. The outer ring rolling surface 11e is formed over the entire circumference of the inner circumferential surface of the outer ring 11b.

The sleeve 15 is a cylindrical member, and the first rolling bearing 11 is mounted on one end side in the longitudinal direction (axial direction), and the second rolling bearing 12 is mounted on the other end side.
A spacer portion 17 that holds the distance between the first rolling bearing 11 and the second rolling bearing 12 at a predetermined distance is formed on the intermediate portion in the axial direction of the sleeve 15 so as to protrude radially inward. In addition, you may comprise the sleeve 15 and the spacer part 17 by another member.

(Rolling bearing polishing apparatus of the first embodiment)
FIG. 3 is an overall schematic view of the rolling bearing polishing device 30 according to the first embodiment, FIG. 3 (a) is a front view, and FIG. 3 (b) is a side view. In FIG. 3A, the backing plate 26 is partially shown in a sectional view for easy understanding. Further, in FIG. 3B, the backing plate 26 and the front plate 27 are illustrated by two-dot chain lines for easy understanding.
The rolling bearing polishing device 30 according to the first embodiment is a device for superfinishing the inner ring rolling surface 11d of the inner ring 11a that is the workpiece W. Note that the vertical direction in FIGS. 3A and 3B corresponds to the vertical vertical direction. In the following, the direction orthogonal to the central axis L1 of the workpiece W in the horizontal plane is defined as the X direction (corresponding to the “first direction” in the claims), and along the central axis L1 of the workpiece W and in the X direction. A direction orthogonal to the Y direction (corresponding to “second direction” in claims) is defined, and a direction orthogonal to the X direction and Y direction is referred to as Z direction (corresponding to “third direction” in claims). Define. In the present embodiment, the X direction and the Y direction correspond to the horizontal direction, and the Z direction corresponds to the vertical direction.

  As shown in FIGS. 3A and 3B, the rolling bearing polishing apparatus 30 of this embodiment mainly includes a pressure rotor 22, a backing plate 26, a front plate 27, a shoe 28, and a pair of rotations. The rollers 25 a and 25 b, the grindstone 31, the grindstone holder 40, and the pusher jig 50 are configured. Below, each component of the grinding | polishing apparatus 30 of a rolling bearing is demonstrated.

As shown in FIG. 3A, the pressure rotor 22 is a columnar member arranged coaxially with the central axis L1 of the workpiece W. The pressure rotor 22 is slidable along the Y direction, and a reduced diameter portion 22 a provided on the workpiece W side can be inserted into the workpiece W. The reduced diameter portion 22a is inserted into the workpiece W and rotatably supports the workpiece W.
The backing plate 26 and the front plate 27 are respectively disposed on both sides in the Y direction (that is, the axial direction) with the workpiece W interposed therebetween, and restrict the movement of the workpiece W in the Y direction.
As shown in FIG. 3B, the shoe 28 is disposed on the opposite side to the grindstone 31 described later in the X direction. When the shoe 28 presses the grindstone 31 against the workpiece W to superfinish the inner ring rolling surface 11d of the workpiece W, the shoe 28 abuts against the workpiece W and restricts movement in the X direction. The outer peripheral surface Wa other than the moving surface 11d is polished.

The pair of rotating rollers 25a and 25b are cylindrical members, and are disposed on both sides in the Z direction (that is, the vertical vertical direction) with the workpiece W interposed therebetween. For example, the upper rotating roller 25a is urged toward the workpiece W, and the lower rotating roller 25b is in contact with the workpiece W and restricts the downward movement of the workpiece W. Thereby, the outer peripheral surfaces of the pair of rotating rollers 25a and 25b are in contact with the outer peripheral surface Wa of the workpiece W, respectively.
In the present embodiment, for example, the upper rotating roller 25a is connected to a driving device such as a motor (not shown) and is formed to be rotatable around the central axis of the rotating roller 25a. As the upper rotating roller 25a rotates, the workpiece W is supported by the pressure rotor 22 and the lower rotating roller 25b and rotates around the central axis L1.

(Whetstone)
FIG. 4 is a perspective view of the rolling bearing polishing apparatus 30 according to the first embodiment.
FIG. 5 is a plan view of the rolling bearing polishing apparatus 30 according to the first embodiment. In FIGS. 4 and 5, illustrations other than the pusher jig 50, the grindstone holder 40, and the grindstone 31 in the polishing device 30 of the rolling bearing are omitted for easy understanding. Further, in FIG. 5, a state where the tip 31 a of the grindstone 31 is separated from the workpiece W is illustrated by a two-dot chain line.
As shown in FIG. 4, the grindstone 31 is in contact with the inner ring rolling surface 11d of the inner ring 11a, which is a workpiece W, and superfinishes the inner ring rolling surface 11d.
As shown in FIG. 5, the grindstone 31 is a prismatic member in which abrasive grains such as synthetic diamond are bonded by a bonding material such as a bond, and a tip portion 31 a that contacts the inner ring rolling surface 11 d of the workpiece W. The base end 31b is connected to the pusher jig 50, and the main body 31c is disposed between the front end 31a and the base end 31b.

FIG. 6 is a cross-sectional view taken along the line AA of FIG.
As shown in FIG. 6, the main body 31 c of the grindstone 31 is inserted into an insertion hole 42 formed in the grindstone holder 40 described later, and is held movably along the X direction by the grindstone holder 40. Is done.
The tip 31a of the grindstone 31 is formed in a curved shape having the same curvature as the side cross section (see FIG. 2) of the inner ring rolling surface 11d when viewed from the Z direction. The tip 31a of the grindstone 31 is pressed by the pusher jig 50 toward the inner ring rolling surface 11d of the work W rotating around the central axis L1.

  A base end portion 31 b of the grindstone 31 is connected to a pusher jig 50 and includes a block-shaped resin member 32. The resin member 32 is formed in the same rectangular shape as the main body 31c of the grindstone 31 when viewed from the X direction. The resin member 32 is bonded and fixed to the grindstone 31 with an adhesive, for example, and is integrated with the grindstone 31. The resin member 32 constitutes a base end portion 31b of the grindstone 31, and a convex portion that can be fitted into the concave portion 52 of the pusher jig 50. 33 is constituted.

(Whetstone holder)
As shown in FIG. 5, the grindstone holder 40 is a long rod-like member formed of a metal material such as aluminum, and extends along the Y direction.
An insertion hole 42 through which the grindstone 31 can be inserted is formed in the distal end portion 40a of the grindstone holder 40 along the X direction. The insertion hole 42 penetrates the distal end portion 40 a of the grindstone holder 40 in the X direction, and the main body portion 31 c of the grindstone 31 is disposed in the insertion hole 42. The inner shape of the insertion hole 42 is slightly larger than the outer shape of the grindstone 31, and holds the grindstone 31 so as to be movable along the X direction.

  The base end portion 40b of the grindstone holder 40 is connected to a main body (not shown) of a rolling bearing polishing device 30 via an actuator (not shown) such as a motor. The actuator moves the grindstone holder 40 when attaching and detaching the workpiece W before and after the superfinishing process, and moves the grindstone 31 held by the grindstone holder 40 close to and away from the machining origin position of the workpiece W. Further, the actuator swings the grindstone 31 held by the grindstone holder 40 along with the curved shape of the inner ring rolling face 11d of the workpiece W together with the grindstone holder 40 at the time of superfinishing the inner ring rolling face 11d. ing.

(Pusher jig)
The pusher jig 50 is a long rod-like member formed of a metal material such as aluminum, for example, like the grindstone holder 40, and extends substantially parallel to the grindstone holder 40 along the Y direction. Exist.
As shown in FIG. 6, a concave portion 52 having an opening on the side where the grindstone 31 is disposed is formed at the distal end portion 50 a of the pusher jig 50. The concave portion 52 is formed so that the resin member 32 (that is, the convex portion 33) of the base end portion 31b of the grindstone 31 can be fitted.

7 is a cross-sectional view taken along line BB in FIG.
As shown in FIG. 7, the distance between the side surfaces 52 a and 52 b facing the Z direction of the recess 52 is shorter than the distance between the side surfaces 33 a and 33 b facing the Z direction of the convex portion 33 of the grindstone 31. Is formed. Thereby, the base end part 31b of the grindstone 31 is clamped by the both side surfaces 52a and 52b facing the Z direction of the recessed part 52, and is hold | maintained in the state in which the movement to the Z direction of the grindstone 31 was suppressed.
In addition, the distance between the side surfaces 52c and 52d facing the Y direction of the concave portion 52 (that is, intersecting the Y direction) is the both side surfaces facing the Y direction of the convex portion 33 of the grindstone 31 (that is, intersecting the Y direction). It is formed so as to be wider than the separation distance between 33c and 33d. Therefore, a gap is formed between the side surface 33 c of the convex portion 33 and the side surface 52 c of the concave portion 52, and between the side surface 33 d of the convex portion 33 and the side surface 52 d of the concave portion 52. Thereby, the base end part 31b of the grindstone 31 is held in a state of being movable in the Y direction in the recess 52, and is connected so as to be rotatable around the axis P along the Z direction.

  As shown in FIG. 5, the proximal end portion 50 b of the pusher jig 50 is connected to the proximal end portion 40 b of the grindstone holder 40 via a pressurizing means (not shown) such as a hydraulic cylinder. The pressurizing means slides the pusher jig 50 in the X direction while keeping the pusher jig 50 substantially parallel to the grindstone holder 40. As a result, the pusher jig 50 moves the grindstone 31 connected to the tip 50a of the pusher jig 50 along the X direction so that the tip 31a of the grindstone 31 abuts against the inner ring rolling surface 11d. Can be separated.

(Function)
Next, the operation of the rolling bearing polishing apparatus 30 formed as described above will be described.
As shown in FIG. 3A, first, the workpiece W is set in a polishing device 30 for a rolling bearing.
Specifically, an actuator (not shown) is driven to separate the grindstone 31 from the processing origin position of the workpiece W together with the grindstone holder 40 and the pusher jig 50. At this time, the pusher jig 50 and the grindstone holder 40 are separated from each other while being substantially parallel (that is, the grindstone 31 is not pressed by the pusher jig 50).

Next, the workpiece W is set in a region surrounded by the backing plate 26, the front plate 27, the shoe 28, and the pair of rotating rollers 25a and 25b so that the central axis L1 is along the Y direction.
Next, the pressure rotor 22 is slid along the Y direction, and the reduced diameter portion 22a at the tip is inserted into the workpiece W to support the workpiece W so as to be rotatable around the central axis L1.
Next, an actuator (not shown) is driven to move the grindstone 31 to the processing origin position of the workpiece W together with the grindstone holder 40 and the pusher jig 50.

Subsequently, as shown in FIG. 3B, the upper rotating roller 25a is rotated to rotate the workpiece W around the central axis L1.
Next, as shown in FIG. 5, the pressing means 50 is operated to slide the pusher jig 50 toward the grindstone holder 40 (left side in FIG. 5), and the inside of the work W rotating the tip 31 a of the grindstone 31. Press against the rolling surface 11d.
Here, the pusher jig 50 may be displaced due to, for example, an attachment error of the pusher jig 50 with respect to the main body of the rolling bearing polishing apparatus 30 or a manufacturing error of the pusher jig 50. However, since the base end portion 31b of the grindstone 31 is connected to the pusher jig 50 so as to be rotatable about the axis P, the base end portion 31b of the grindstone 31 is rotated to rotate in the X direction. The displacement of the pusher jig 50 with respect to the Y direction can be absorbed. Thereby, the grindstone 31 is prevented from coming into contact with the inner peripheral surface of the insertion hole 42 of the grindstone holder 40 in an inclined state, and moves in the insertion hole 42 of the grindstone holder 40 along the X direction. .

  Next, the actuator (not shown) is driven while pressing the tip 31a of the grindstone 31 against the inner ring rolling surface 11d of the rotating workpiece W, and the grindstone holder 40 and the pusher are moved along the curved shape of the inner ring rolling surface 11d. The tip portion 31a of the grindstone 31 is swung together with the jig 50. Thereby, super finishing is given to inner ring rolling surface 11d. When the inner ring rolling surface 11d is polished and has a predetermined surface roughness, the super finishing of the inner ring rolling surface 11d is completed.

After the superfinishing of the inner ring rolling surface 11d is completed, the workpiece W is attached and detached and the workpiece W is exchanged. At this time, the operation of the pressurizing means is released, and the pusher jig 50 is slid to the side opposite to the grindstone holder 40 (right side in FIG. 5) to separate the tip 31a of the grindstone 31 from the workpiece W.
Here, in the prior art, since the base end portion of the grindstone and the pusher jig are connected to each other by the surface tension (interface tension) of the cutting oil, the connection between the grindstone and the pusher jig is released. There was a possibility that the grindstone could not be separated from the workpiece.
However, in the present embodiment, the grindstone 31 is connected by fitting the convex portion 33 of the base end portion 31b and the concave portion 52 of the pusher jig 50, so that the grindstone 31 and the pusher treatment are compared with the prior art. It is possible to suppress the connection with the tool 50 from being released. Therefore, the grindstone 31 can be reliably separated from the workpiece W. Further, when the grindstone 31 is separated from the workpiece W, the base end portion 31b of the grindstone 31 rotates as described above, and the displacement of the pusher jig 50 with respect to the Y direction is absorbed. Therefore, the grindstone 31 is prevented from coming into contact with the inner peripheral surface of the insertion hole 42 of the grindstone holder 40 in an inclined state, and moves in the insertion hole 42 of the grindstone holder 40 along the X direction.

(Effects of the first embodiment)
According to the first embodiment, the base end portion 31b of the grindstone 31 is connected to the pusher jig 50 so as to be rotatable about the axis P along the Z direction. Can be reliably separated from the workpiece W, and contact between the grindstone 31 and the workpiece W can be prevented when the workpiece W is exchanged.
Even if the pusher jig 50 is displaced due to an attachment error or a manufacturing error, the base end portion 31b of the grindstone 31 rotates to absorb the displacement of the pusher jig 50, and the grindstone 31 is displaced. Can be prevented. Accordingly, the grindstone 31 can be moved along the X direction so that the grindstone 31 can be brought into contact with and separated from the workpiece W, so that the inside of the insertion hole 42 of the grindstone holder 40 in a state where the grindstone 31 is inclined. Contact with the peripheral surface can be prevented.
Therefore, the grindstone 31 can be prevented from being damaged or dropped when the workpiece W is exchanged, and the grindstone 31 can be held with high accuracy by suppressing the wear of the grindstone holder 40.

Moreover, since the base end part 31b of the grindstone 31 and the pusher jig 50 are connected by fitting the convex part 33 and the concave part 52, the grindstone 31 and the pusher jig 50 are compared with the prior art. It is possible to suppress the disconnection. Therefore, since the grindstone 31 can be reliably separated from the workpiece W, the grindstone 31 can be prevented from being damaged or dropped when the workpiece W is replaced.
Moreover, since the clearance gap is provided between the side surfaces 33c and 33d which cross | intersect the Y direction of the convex part 33, and the side surfaces 52c and 52d which cross | intersect the Y direction of the recessed part 52, the base end part 31b of the grindstone 31 is Z direction. It can be easily rotated around the axis line P. Therefore, it is possible to hold the grindstone 31 with high accuracy by reliably suppressing the wear of the grindstone holder 40.
Moreover, the base end part 31b of the grindstone 31 and the pusher jig | tool 50 can be easily attached or detached only by fitting and releasing the convex part 33 and the recessed part 52. FIG. Therefore, the rolling bearing polishing apparatus 30 can be easily maintained.

(Modification of the first embodiment)
FIG. 8 is a plan view of a rolling bearing polishing apparatus 30 according to a modification of the first embodiment.
Then, the grinding | polishing apparatus 30 of the rolling bearing which concerns on the modification of 1st embodiment is demonstrated. In addition, below, description is abbreviate | omitted about the component similar to 1st embodiment, and only a different part is demonstrated.
In the rolling bearing polishing apparatus 30 according to the first embodiment, a convex portion 33 is formed on the grindstone 31, and a concave portion 52 is formed on the pusher jig 50 (see FIG. 6).
On the other hand, the recessed part 34 may be formed in the grindstone 31, and the convex part 54 may be formed in the pusher jig | tool 50 like the modification of 1st embodiment shown in FIG.

As shown in FIG. 8, the base end portion 31 b of the grindstone 31 includes a resin member 32. The resin member 32 includes an opening on the pusher jig 50 side and a recess 34 formed in a substantially C shape when viewed in the Z direction.
Further, the distal end portion 50 a of the pusher jig 50 includes a convex portion 54 that can be fitted into the concave portion 34 of the resin member 32. The convex portion 54 is formed in a substantially cylindrical shape that extends along the Z direction and protrudes toward the grindstone 31 side.

The outer shape of the convex portion 54 of the pusher jig 50 is slightly smaller than the inner shape of the concave portion 34 of the grindstone 31, and when the concave portion 34 of the grindstone 31 and the convex portion 54 of the pusher jig 50 are fitted, A gap is formed between the outer peripheral surface of the convex portion 54 and the inner peripheral surface of the concave portion 34. Further, when the concave portion 34 of the grindstone 31 and the convex portion 54 of the pusher jig 50 are fitted, a gap is formed between the end surface of the base end portion 31 b of the grindstone 31 and the distal end portion 50 a of the pusher jig 50. The Thereby, the base end part 31b of the grindstone 31 is connected to the pusher jig 50 so as to be rotatable around an axis P that is a central axis along the Z direction of the convex part 54.
The recess 34 of the grindstone 31 is formed in the resin member 32 and can be elastically deformed. Therefore, the convex portion 54 of the pusher jig 50 can be fitted into the concave portion 34 of the grindstone 31 from the X direction.

(Second embodiment)
FIG. 9 is a plan view of the rolling bearing polishing apparatus 30 according to the second embodiment.
10 is a cross-sectional view taken along the line CC of FIG.
Next, the rolling bearing polishing apparatus 30 according to the second embodiment will be described.
In the rolling bearing polishing device 30 of the first embodiment, the base end portion 31b of the grindstone 31 and the pusher jig 50 are connected by fitting the convex portion 33 of the grindstone 31 and the concave portion 52 of the pusher jig 50. (See FIG. 6).
On the other hand, as shown in FIG. 9, in the rolling bearing polishing device 30 of the second embodiment, the base end portion 31 b of the grindstone 31 and the pusher jig 50 are connected by a pin member 61. This is different from the first embodiment. In addition, below, description is abbreviate | omitted about the component similar to 1st embodiment, and only a different part is demonstrated.

  As shown in FIG. 10, the base end portion 31 b of the grindstone 31 is formed in a substantially U shape in sectional view having an opening on the pusher jig 50 side, and the distal end portion 50 a of the pusher jig 50 is formed on both sides in the Z direction. It is pinched from. A through hole 35 penetrating along the Z direction is formed in the base end portion 31 b of the grindstone 31. Further, a through hole 55 concentric with the through hole 35 of the grindstone 31 is formed at the tip 50a of the pusher jig 50.

A pin member 61 is inserted into the through hole 35 of the grindstone 31 and the through hole 55 of the pusher jig 50.
The pin member 61 is a columnar member made of, for example, metal or the like, and expands above the main body 61a and the main body 61a disposed inside the through hole 35 of the grindstone 31 and the through hole 55 of the pusher jig 50. And a head 61b having a diameter. When the head portion 61b of the pin member 61 contacts the upper surface of the grindstone 31, the pin member 61 is prevented from falling off. Further, the main body portion 61 a of the pin member 61 is disposed inside the through hole 35 of the grindstone 31 and the through hole 55 of the pusher jig 50, so that the base end portion 31 b of the grindstone 31 is located with respect to the pusher jig 50. The pin member 61 is pivotally connected around an axis P that is the central axis of the pin member 61.
In addition, in 2nd embodiment, although the through-hole 35 is formed in the base end part 31b of the grindstone 31 without providing the resin member 32 (refer FIG. 6), the resin member 32 is formed in the base end part 31b of the grindstone 31. The through hole 35 may be formed in the resin member 32.

(Effect of the second embodiment)
According to the second embodiment, the base end portion 31 b of the grindstone 31 and the pusher jig 50 are securely connected by the pin member 61, and the base of the grindstone 31 around the central axis (that is, the axis P) of the pin member 61. The end 31b can be easily rotated. Therefore, the grindstone 31 can be separated from the workpiece W to reliably prevent the grindstone 31 from being damaged or dropped when the workpiece W is exchanged, and the grindstone holder 40 can be further prevented from being worn and the grindstone 31 can be held with high accuracy.

(Third embodiment)
FIG. 11 is a plan view of the rolling bearing polishing apparatus 30 according to the third embodiment.
Next, the rolling bearing polishing apparatus 30 according to the third embodiment will be described. In addition, below, description is abbreviate | omitted about the component similar to 1st embodiment, and only a different part is demonstrated.
As shown in FIG. 11, in the rolling bearing polishing device 30 of the third embodiment, an engagement recess 332 a is formed in the base end portion 31 b of the grindstone 31, and the engagement claw portions 352 a and 352 b are formed in the pusher jig 50. Unlike the first embodiment, the engaging recess 332a and the engaging claws 352a and 352b are engaged and the base end 31b of the grindstone 31 and the pusher jig 50 are connected. ing.

The base end portion 31 b of the grindstone 31 includes a resin member 332. The resin member 332 includes an engagement recess 332a having an opening on the pusher jig 50 side and formed in a substantially U shape when viewed in the Z direction.
A pair of engaging claw portions 352a and 352b are erected on the front end portion 50a of the pusher jig 50 toward the grindstone 31 side. The pair of engaging claws 352a and 352b are formed so as to extend along the X direction and so that the front end portions on the side of the grindstone 31 spread in the Y direction. The maximum width along the Y direction at the distal ends of the pair of engaging claws 352a and 352b is formed to be wider than the width along the Y direction of the engaging recess 332a. Thus, by disposing the pair of engagement claw portions 352a and 352b in the engagement recess 332a, the engagement recess 332a and the pair of engagement claw portions 352a and 352b can be engaged.
The proximal end portion 31b of the grindstone 31 is connected to the pusher jig 50 so as to be rotatable around the axis P along the Z direction in the vicinity of the proximal end portions of the pair of engaging claws 352a and 352b.

(Effect of the third embodiment)
According to the third embodiment, the base end portion 31b of the grindstone 31 and the pusher jig 50 can be easily attached and detached simply by engaging and releasing the engaging claws 352a and 352b and the engaging recess 332a. Therefore, the rolling bearing polishing apparatus 30 can be easily maintained.

(Fourth embodiment)
FIG. 12 is a plan view of a rolling bearing polishing apparatus 30 according to a fourth embodiment.
Next, the rolling bearing polishing apparatus 30 according to the fourth embodiment will be described. In addition, below, description is abbreviate | omitted about the component similar to 1st embodiment, and only a different part is demonstrated.
As shown in FIG. 12, in the rolling bearing polishing device 30 of the fourth embodiment, an intermediate member 65 is provided between the base end portion 31 b of the grindstone 31 and the pusher jig 50, and the base end portion 31 b of the grindstone 31. And the pusher jig 50 are different from those of the first embodiment in that they are connected via an intermediate member 65.

  As shown in FIG. 12, a convex portion 433 is formed at the base end portion 31 b of the grindstone 31. The convex portion 433 is formed in a substantially isosceles shape having a short side on the tip 31a side of the grindstone 31 and a long side on the pusher jig 50 side when viewed from the Z direction, and along the Z direction. It is extended. Further, a convex portion 454 is formed at the tip portion 50 a of the pusher jig 50. The convex portion 454 is formed in a substantially isosceles shape having a short side on the distal end portion 50a side of the pusher jig 50 as viewed from the Z direction and a long side on the grindstone 31 side, along the Z direction. It is extended. The convex part 433 of the grindstone 31 and the convex part 454 of the pusher jig 50 are so-called dovetail convex parts.

FIG. 13 is a perspective view of the intermediate member 65.
The intermediate member 65 is a substantially block-shaped member made of, for example, resin or metal. On both side surfaces of the intermediate member 65 in the X direction, groove portions 65a and 65b that can be fitted to the convex portion 454 of the pusher jig 50 and the convex portion 433 of the grindstone 31 (both see FIG. 12) along the Z direction. It is extended. The groove portions 65a and 65b are formed in a substantially isosceles shape corresponding to the outer shapes of the convex portion 454 of the pusher jig 50 and the convex portion 433 of the grindstone 31 when viewed from the Z direction, and are so-called dovetail groove portions. Yes.

In the present embodiment, the convex portion 454 of the pusher jig 50 and the convex portion 433 of the grindstone 31 are respectively dovetail convex portions, and the groove portions 65a and 65b of the intermediate member 65 are respectively dovetail groove portions. Therefore, by fitting the convex portion 454 and the groove portion 65a of the pusher jig 50 and fitting the convex portion 433 and the groove portion 65b of the grindstone 31, the grindstone 31 and the pusher jig 50 are relatively aligned in the X direction. Movement is reliably regulated. This reliably prevents the connection between the grindstone 31 and the pusher jig 50 from being released.
Further, in the present embodiment, the inner shape of the groove 65a fitted to the convex portion 454 of the pusher jig 50 is formed to be slightly larger than the outer shape of the convex portion 454 of the pusher jig 50. Accordingly, as shown in FIG. 12, when the convex portion 454 of the pusher jig 50 and the groove portion 65 a are fitted, the base end portion 31 b of the grindstone 31 is in the X of the convex portion 454 with respect to the pusher jig 50. And pivotally connected around the axis P along the Z direction at the approximate center in the direction and the Y direction.

The groove portion 65a fitted to the convex portion 454 of the pusher jig 50 is closed at the upper end in the Z direction to form a stopper portion 65c.
The stopper portion 65c contacts the upper end surface of the convex portion 454 of the pusher jig 50 when the convex portion 454 of the pusher jig 50 and the groove portion 65a are fitted. Thereby, the downward movement of the intermediate member 65 is restricted, and the fall of the intermediate member 65 is prevented.

(Effect of the fourth embodiment)
According to the fourth embodiment, it is possible to cope with various grindstones 31 and pusher jigs 50 by appropriately changing the shape of the intermediate member 65. In particular, since it is difficult to process the grindstone 31 into a complicated shape, the shape of the intermediate member 65 is appropriately changed without processing the grindstone 31 so as to correspond to the shapes of various grindstones 31 and pusher jigs 50. It is suitable for the case.

(Fifth embodiment)
FIG. 14 is a plan view of a rolling bearing polishing apparatus 30 according to a fifth embodiment.
Next, a rolling bearing polishing apparatus 30 according to a fifth embodiment will be described. In addition, below, description is abbreviate | omitted about the component similar to 1st embodiment, and only a different part is demonstrated.
As shown in FIG. 14, the rolling bearing polishing device 30 of the fifth embodiment is different from the first embodiment in that the base end portion 31b of the grindstone 31 and the pusher jig 50 are connected by magnetic force. ing.
A plate-like attracting member 37 made of a magnetic material such as iron is attached to the base end portion 31b of the grindstone 31. A magnet 57 is attached to the distal end portion 50 a of the pusher jig 50 at a position corresponding to the proximal end portion 31 b of the grindstone 31. Thereby, the base end portion 31 b of the grindstone 31 is attracted by the magnetic force of the magnet 57 and connected to the pusher jig 50. The proximal end portion 31b of the grindstone 31 has an axis P along the Z direction in the vicinity of the approximate center in the Y direction on the boundary surface between the proximal end portion 31b of the grindstone 31 and the magnet 57 of the pusher jig 50 with respect to the pusher jig 50. It is pivotally connected around.

(Modification of the fifth embodiment)
FIG. 15 is a plan view of a rolling bearing polishing apparatus 30 according to a modification of the fifth embodiment.
As in the modification of the fifth embodiment shown in FIG. 15, the end surface 37a on the pusher jig 50 side of the attracted member 37 may be formed as a curved surface that bulges toward the pusher jig 50 when viewed from the Z direction. Good. Thereby, the end surface 37a of the attracted member 37 and the magnet 57 of the pusher jig 50 can be in line contact. Therefore, the base end portion 31 b of the grindstone 31 is connected to the pusher jig 50 so as to be easily rotatable around the axis P.

(Effects of the fifth embodiment and the modification of the fifth embodiment)
According to the fifth embodiment and the modification of the fifth embodiment, the base end portion 31b of the grindstone 31 and the pusher jig 50 can be easily attached and detached. Therefore, the rolling bearing polishing apparatus 30 can be easily maintained.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

  In each embodiment and each modification, the inner ring rolling surface 11d of the inner ring 11a has been superfinished by the rolling bearing polishing device 30, but the superfinishing target is not limited to the inner ring rolling surface 11d. For example, the outer ring rolling surface 11e of the outer ring 11b may be superfinished by the grinding device 30 of the rolling bearing.

The shape of the resin member 32 is not limited to the first embodiment and the modification of the first embodiment.
Moreover, in 2nd embodiment, the base end part 31b of the grindstone 31 is formed in the cross-sectional view substantially U shape, and while the front-end | tip part 50a of the pusher jig | tool 50 is clamped from the both sides of a Z direction, the base of the grindstone 31 is included. The pin member 61 was inserted through the end 31b and the tip 50a of the pusher jig 50 (see FIG. 10). On the other hand, for example, one of the side surfaces in the Z direction of the base end portion 31b of the grindstone 31 is recessed to form a stepped portion, and the tip end portion 50a of the pusher jig 50 is placed on this stepped portion. In addition, the pin member 61 may be inserted through the base end portion 31 b of the grindstone 31 and the tip end portion 50 a of the pusher jig 50.
Moreover, the shape of the pin member 61 is not limited to 2nd embodiment. For example, the pin member 61 is a bolt, and is screwed into either the base end portion 31b of the grindstone 31 or the pusher jig 50, whereby the base end portion 31b of the grindstone 31 and the pusher jig 50 are rotated. It may be movably connected.

In the third embodiment, the engagement recess 332 a is formed in the proximal end portion 31 b of the grindstone 31, and the engagement claws 352 a and 352 b are formed in the pusher jig 50. An engaging convex portion may be formed on 31 b and an engaging concave portion may be formed on the pusher jig 50.
Further, the shapes of the engaging recess 332a and the engaging claws 352a and 352b are not limited to the third embodiment.
Further, the shape of the intermediate member 65 is not limited to the fourth embodiment.

  In addition, it is possible to appropriately replace the components in the above-described embodiments with known components without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 11 ... 1st rolling bearing (rolling bearing) 11a ... Inner ring 11b ... Outer ring 11c ... Rolling body 11d ... Inner ring rolling surface (rolling surface) 11e ... Outer ring rolling surface ( Rolling surface) 12... 2nd rolling bearing (rolling bearing) 30... Rolling bearing polishing device 31... Grinding stone 31 b... Base end portion 32, 332.・ Protrusions 33c, 33d ... sides 34 ... concaves 40 ... grinding stone holders 42 ... insertion holes 50 ... pusher jigs 52 ... concaves 52c, 52d ... sides 54 ... -Convex part 61 ... Pin member 65 ... Intermediate member 332a ... Engaging recess 352a, 352b ... Engaging recess L1 ... Central axis P ... Axis W ... Workpiece

Claims (7)

An inner ring, an outer ring surrounding the inner ring, a plurality of rolling elements rotatably held between the inner ring and the outer ring, an outer peripheral surface of the inner ring and an inner peripheral surface of the outer ring, A rolling bearing polishing device for processing the rolling surface of a rolling bearing provided with a rolling surface into which a rolling element is fitted,
A grindstone that abuts on the inner ring or the outer ring, which is a workpiece, and grinds and processes the rolling surface;
A grindstone holder that includes an insertion hole through which the grindstone can be inserted along a first direction orthogonal to the central axis of the workpiece, and that holds the grindstone movably along the first direction;
Extending along a second direction orthogonal to the first direction, the base end of the grindstone is connected, the grindstone is moved along the first direction, and the rolling surface is A pusher jig for contacting or separating the grindstone,
With
The base end portion of the grindstone is connected to the pusher jig so as to be rotatable about an axis along a third direction orthogonal to the first direction and the second direction. Polishing device for rolling bearings. The rolling bearing polishing apparatus according to claim 1,
A convex portion is formed on one of the base end portion of the grindstone and the pusher jig,
On the other end of the base end portion of the grindstone and the pusher jig, a concave portion that can be fitted with the convex portion is formed,
The base end portion of the grindstone and the pusher jig are connected by fitting the convex portion and the concave portion,
A rolling bearing polishing apparatus, wherein a gap is provided between a side surface of the convex portion intersecting with the second direction and a side surface of the concave portion intersecting with the second direction. The rolling bearing polishing apparatus according to claim 1,
A rolling bearing polishing apparatus, wherein a base end portion of the grindstone and the pusher jig are connected by a pin member provided along the third direction. The rolling bearing polishing apparatus according to claim 1,
An engagement claw portion is formed on one of the base end portion of the grindstone and the pusher jig,
On the other end of the base end of the grindstone and the pusher jig, an engagement recess that can be engaged with the engagement claw is formed.
The rolling bearing polishing apparatus according to claim 1, wherein the base end portion of the grindstone and the pusher jig are connected by engaging the engaging claw portion and the engaging concave portion. The rolling bearing polishing apparatus according to claim 1,
Between the base end of the grindstone and the pusher jig, an intermediate member is provided,
A rolling bearing polishing apparatus, wherein a base end portion of the grindstone and the pusher jig are connected via the intermediate member. The rolling bearing polishing apparatus according to claim 1,
A rolling bearing polishing apparatus, wherein a base end portion of the grindstone and the pusher jig are connected by magnetic force. A rolling bearing polishing apparatus according to any one of claims 1 to 6,
A rolling bearing polishing apparatus comprising a resin member at a base end of the grindstone.

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