JP2011110684A - Outer periphery grinding tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grinding tool for grinding an outer peripheral surface after grinding a bearing ring formed on the inner diameter side of a bearing outer race. <P>SOLUTION: In this outer periphery grinding tool 10, a large diameter part 12 is arranged on a shaft 11. The bearing ring 14 on the inner diameter side of the bearing outer race 13 is already ground, and balls 15 of curvature smaller than track curvature of the bearing ring 14 are closely and densely installed in the bearing ring 14, and the large diameter part 12 is fitted to and inserted into the inner diameter side of the balls 15, and densely contacts the balls 15 with the bearing ring 14, and the bearing outer race 13 is rotatably supported by the shaft 11. A ball presser 17 and first and second bolt installing plates 18 and 19 are arranged on the shaft 11, and first to third stopper bolts 22-24 are arranged on the ball presser 17 and the first and second ball installing plates 18 and 19. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a peripheral grinding jig in which a bearing ring is provided on the inner diameter side like a rolling bearing or a rolling bearing, and the outer ring in a state where the bearing ring has already been processed is ground again.

2. Description of the Related Art Conventionally, when processing an outer diameter centering on a small diameter hole of a phenolic glass tube for an optical connector, the glass tube 33 attached to the phenol 31 at a conical center 38 as shown in FIG. In general, the outer diameter of the phenolic 31 for connectors is cylindrically ground with a grindstone 36 by gripping the outer diameter with the small-diameter hole 32 as a reference and rotating it as shown by an arrow 35 (for example, patents). Reference 1).
Furthermore, in the centerless grinding machine shown in FIG. 3, the top surface of the vertical plate-like blade 41 is formed on the slope 42, and the adjusting grindstone 43 is a rotating grindstone having a horizontal rotation axis (perpendicular to the paper surface). A cylindrical workpiece 44 is supported by 41 and the adjustment grindstone 43. The adjusting grindstone 43 rotates in the direction of arrow R1, and the workpiece 44 is rotated in the direction of arrow R2. The grinding wheel 45 is a rotating wheel having a horizontal rotation axis (perpendicular to the paper surface), and is rotated in the direction of the arrow R3 at a peripheral speed larger than that of the workpiece 44, and comes into contact with the workpiece 44. Grind (see, for example, Patent Document 2).

JP-A-62-236659 JP 7-276196 A

However, in Patent Document 1 and Patent Document 2, when a bearing ring is provided on the inner diameter side and only the bearing ring has already been processed as in the case of a rolling bearing or a rolling bearing, the outer peripheral surface of the bearing outer ring is already processed. There is a problem that uneven thickness is generated on the outer periphery of the bearing with respect to the raceway.
The present invention has been made in order to solve the above-mentioned problems. In the case where the bearing ring is provided on the inner diameter side as in the case of a rolling bearing or a rolling bearing and only the bearing ring has already been processed, the outer peripheral surface of the bearing outer ring is formed. An object of the present invention is to provide an outer peripheral grinding jig that prevents a bearing outer ring from being unevenly formed with respect to a processed raceway ring when grinding.

In order to solve the above-described problems, the invention described in the claims of the present invention includes a shaft-like member rotatably supported at the center of the grinding machine and having a conical large-diameter portion in the axial direction,
A ball member that is fitted to the bearing ring on the inner diameter side of the bearing outer ring that is a processed member without a gap, and has a curvature smaller than the curvature of the track on the bearing ring,
A ball presser member provided near the large-diameter portion of the shaft-shaped member and pressing the ball member from the axial direction of the shaft-shaped member and pressing the ball member against the raceway ring;
A first bolt mounting plate member and a second bolt mounting plate member provided on the shaft member at opposite positions on both side surfaces of the large diameter portion provided on the shaft member;
First and second stopper bolt members that are screwed to the first and second bolt mounting plate members so as to advance and retreat, and press both side surfaces of the bearing outer ring;
A third stopper bolt member that is screwed to the first bolt mounting plate member so as to freely advance and retreat, and presses the ball pressing member;
It is provided with.

  According to the present invention, a ball member having a curvature smaller than the raceway curvature is inserted into the nail by fixing the ball member to both ends of the bearing outer ring and the ball member is fixed to the raceway of the bearing outer ring. And the outer peripheral surface of the bearing outer ring can be ground stably.

It is a front view which shows schematic structure of the outer periphery grinding process jig | tool which concerns on embodiment of this invention. It is the schematic of the conventional grinding process. It is the schematic of the conventional centerless grinding process.

Hereinafter, preferred embodiments of the outer periphery grinding jig according to the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of a peripheral grinding jig 10 according to an embodiment of the present invention.
As shown in FIG. 1, the outer peripheral grinding jig 10 has a shaft 11 rotatably supported at a center of a grinding machine (not shown), and the shaft 11 is provided with a conical large diameter portion 12 in the axial direction. Yes. Reference numeral 13 denotes a bearing outer ring which is a processed member. The bearing ring 14 on the inner diameter side of the bearing outer ring 13 has already been processed, and shows a state in which the outer peripheral surface of the bearing outer ring 13 is ground.

For this reason, a ball (ball member) 15 having a curvature smaller than the raceway curvature of the bearing ring 14 is attached to the nectar without any gap on the raceway 14 of the bearing outer ring 13, and a large shaft 11 is placed on the inner diameter side of the ball 15. The diameter portion 12 is inserted and the ball 15 is brought into contact with the nectar on the raceway ring 14, and the bearing outer ring 13 is rotatably supported by the shaft 11.
A cylindrical ball presser (ball presser member) 17 that presses the outer peripheral surface of the ball 15 from the axial direction is provided on the middle diameter portion 16 of the shaft 11. The ball presser 17 is formed in a ring shape with an end surface portion contacting the outer peripheral surface of the ball 15 being recessed with respect to the axial direction.

First and second disk-shaped bolt mounting plates (bolt mounting plate members) 18 and 19 fitted on the shaft 11 are fixed to both sides of the large diameter portion 12 by fixing nuts 20 and 21. The first bolt mounting plate 18 has a first stopper bolt (stopper bolt member) 22 that advances and retreats in the axial direction of the shaft 11 at a position of four equal intervals (only one place is shown in FIG. 1) in the circumferential direction. The tip (right end in FIG. 1) is in contact with and supported by one surface (left surface in FIG. 1) of the bearing outer ring 13.
The second bolt mounting plate 19 has a second stopper bolt (stopper bolt member) 23 that advances and retreats in the axial direction of the shaft 11 at a position of four equal intervals (only one is shown in FIG. 1) in the circumferential direction. The tip (left end in FIG. 1) contacts and supports the other surface (right surface in FIG. 1) of the bearing outer ring 13.

  Further, on the first bolt mounting plate 18, a third stopper bolt (stopper bolt member) 24 pressed by the ball 15 via the ball presser 17 is equally distributed in the circumferential direction (only one position is shown in FIG. 1). ) Is provided so as to advance and retreat in the axial direction of the shaft 11. The tips of the first and second stopper bolts 22 and 23 that contact both side surfaces of the bearing outer ring 13 and the third stopper bolt 24 that contacts the ball retainer 17 are formed in a conical shape.

The peripheral grinding jig 10 according to the present embodiment is basically configured as described above, and the operation will be described next.
The case where the outer peripheral surface of the bearing outer ring 13 is ground in the case where the inner ring side raceway ring 14 has already been processed by grinding, honing, lapping or the like will be described.
First, the large diameter portion 12 of the shaft 11 is inserted into the inner diameter side formed by the ball 15 in a state where the ball 15 having a curvature smaller than the orbital curvature is inserted in the nectar without a gap in the bearing ring 14 of the bearing outer ring 13. The ball 15 comes into contact with the race 14 by the outer peripheral surface of the portion 12, that is, the conical surface.

In this state, the ball retainer 17 fitted into the medium diameter portion 16 of the shaft 11 is pressed against the outer diameter of the ball 15 from the axial direction of the shaft 11 by the third stopper bolt 24, and the ball 15 is attached to the raceway ring 14. The bearing outer ring 13 is positioned by pressing.
Next, both side surfaces of the bearing outer ring 13 are pressed by first and second stopper bolts 22 and 23 screwed to the first and second bolt mounting plates 18 and 19 fixed to the shaft 11 to fix the both side surfaces. To do. In this state, the shaft 11 is rotatably supported at the center of a grinding machine (not shown), and the outer peripheral surface of the bearing outer ring 13 is ground.

DESCRIPTION OF SYMBOLS 10 Peripheral grinding jig 11 Shaft 12 Large diameter part 13 Bearing outer ring 14 Race ring 15 Ball 17 Ball presser 18, 19 Bolt mounting plate 21-24 Stopper bolt

Claims (1)

A shaft-shaped member rotatably supported at the center of the grinding machine and having a conical large-diameter portion in the axial direction;
A ball member that is fitted to the bearing ring on the inner diameter side of the bearing outer ring that is a processed member without a gap, and has a curvature smaller than the curvature of the track on the bearing ring,
A ball presser member provided near the large-diameter portion of the shaft-shaped member and pressing the ball member from the axial direction of the shaft-shaped member and pressing the ball member against the raceway ring;
A first bolt mounting plate member and a second bolt mounting plate member provided on the shaft member at opposite positions on both side surfaces of the large diameter portion provided on the shaft member;
First and second stopper bolt members that are screwed to the first and second bolt mounting plate members so as to advance and retreat, and press both side surfaces of the bearing outer ring;
A third stopper bolt member that is screwed to the first bolt mounting plate member so as to freely advance and retreat, and presses the ball pressing member;
A peripheral grinding jig characterized by comprising: