Ring-shaped member grinding device and grinding method, bearing manufacturing method, mechanical device manufacturing method, and vehicle manufacturing method

Claims

1. A first mechanism that supports a metal ring-shaped member and rotates the ring-shaped member in a circumferential direction around a reference axis; a second mechanism having a grindstone that is pressed radially inward against the outer peripheral surface of the ring-shaped member to grind the outer peripheral surface; a third mechanism that supports the ring-shaped member and has a support portion that contacts the inner peripheral surface of the ring-shaped member in at least one circumferential range around the reference axis, and the inner peripheral surface of the ring-shaped member moves circumferentially relative to the support portion.

2. The grinding device for a ring-shaped member according to claim 1 , wherein the at least one circumferential range includes a circumferential position corresponding to a contact position between the grindstone and the ring-shaped member.

3. 2. The grinding device for a ring-shaped member according to claim 1, wherein the support portion has a plurality of inner diameter side support members each of which is brought into contact with the inner peripheral surface of the ring-shaped member.

4. 4. The grinding device for a ring-shaped member according to claim 3, wherein the plurality of inner diameter side support members include a first member having a first support range and a second member having a second support range, and an angle between a circumferential center position of the first support range and a circumferential center position of the second support range is equal to or greater than 20° and equal to or less than 160°.

5. 5. The grinding device for a ring-shaped member according to claim 1, wherein the support portion has a shoe that slides against the inner peripheral surface of the ring-shaped member.

6. 6. The grinding device for a ring-shaped member according to claim 5, wherein the support portion has an area capable of contacting the inner peripheral surface of the ring-shaped member, and a central angle corresponding to the area is 20 degrees or more and 180 degrees or less.

7. The grinding device for a ring-shaped member according to claim 5 , wherein the third mechanism has a biasing member that biases the support portion toward the inner circumferential surface of the ring-shaped member.

8. The grinding device for a ring-shaped member according to claim 1 , wherein the support portion is in rolling contact with the inner circumferential surface of the ring-shaped member.

9. 5. The grinding device for a ring-shaped member according to claim 1, wherein the first mechanism has a holding member that holds the ring-shaped member by magnetic attraction and drives the ring-shaped member to rotate.

10. 5. The grinding device for a ring-shaped member according to claim 1, wherein the first mechanism comprises a drive roller having an outer circumferential surface that is frictionally engaged with the inner circumferential surface or the outer circumferential surface of the ring-shaped member.

11. 5. The grinding device for a ring-shaped member according to claim 1, wherein the grindstone is pressed against the outer peripheral surface of the ring-shaped member while rotating.

12. 5. A grinding device for a ring-shaped member as described in any one of claims 1 to 4, wherein at least a portion of the support portion that contacts the inner peripheral surface of the ring-shaped member is located in a first circumferential range having a central angle of ±45° about the central axis of the ring-shaped member, with a first imaginary line connecting the central axis of the ring-shaped member and the central axis of the grinding wheel as a reference, when viewed in the axial direction of the central axis of the ring-shaped member.

13. 13. The grinding device for a ring-shaped member as described in claim 12, wherein at least a portion of the support portion that contacts the inner peripheral surface of the ring-shaped member is located in a second circumferential range in which the central angle about the central axis of the ring-shaped member is within a range of ±45°, based on a second imaginary line that extends from the central axis of the ring-shaped member in a direction that makes an angle of 90° with the first imaginary line, when viewed in the axial direction of the ring-shaped member.

14. the grindstone is a rotating grindstone that rotates around its central axis in a direction opposite to the rotation direction of the ring-shaped member and such that the peripheral speed of its outer circumferential surface is faster than the peripheral speed of the outer circumferential surface of the ring-shaped member, while pressing its outer circumferential surface against the outer circumferential surface of the ring-shaped member; 14. The grinding device for a ring-shaped member according to claim 13, wherein the second imaginary line extends from the central axis of the ring-shaped member in a direction offset by 90 degrees from the first imaginary line in a direction opposite to the rotation direction of the ring-shaped member.

15. 5. The grinding device for a ring-shaped member according to claim 1, wherein the third mechanism further includes an outer diameter side support member that contacts the outer peripheral surface of the ring-shaped member and supports the ring-shaped member in the radial direction.

16. 4. The grinding device for a ring-shaped member according to claim 3, wherein the third mechanism has only the inner diameter side support member out of the inner diameter side support member and an outer diameter side support member that contacts the outer peripheral surface of the ring-shaped member and supports the ring-shaped member in the radial direction.

17. A step of supporting a metal ring-shaped member by a first mechanism and rotating the ring-shaped member in a circumferential direction around a reference axis; a step of pressing a grindstone against an outer peripheral surface of the ring-shaped member by a second mechanism, the step including a step of supporting a support portion that is in contact with an inner peripheral surface of the ring-shaped member in at least one circumferential range around the reference axis by a third mechanism; A method for grinding a ring-shaped member, comprising:

18. A method for manufacturing a bearing including an inner ring or an outer ring as a ring-shaped member, comprising a step of machining an outer peripheral surface of the ring-shaped member using the grinding method for a ring-shaped member according to claim 17.

19. manufacturing a bearing using the manufacturing method of claim 18; a step of attaching the shaft rotatably supported by the bearing to an apparatus body; A method for manufacturing a mechanical device, comprising:

20. manufacturing a bearing using the manufacturing method of claim 18; a step of attaching the shaft rotatably supported by the bearing to a vehicle body; A method for manufacturing a vehicle, comprising: