Method of manufacturing rolling bearing, method of manufacturing vehicle and method of manufacturing machine

Patent metadata

Field	Value
Publication number	US-11534884-B2
Application number	US-202217685663-A
Country	US
Kind code	B2
Filing date	Mar 3, 2022
Priority date	Feb 17, 2016
Publication date	Dec 27, 2022
Grant date	Dec 27, 2022

Abstract

A grinding apparatus includes: a grinding stone in which an outer circumferential surface thereof is pressed against the workpiece while being rotated and driven; and a fluid injection apparatus that has a fluid injection nozzle including an injection port from which a fluid is injected to the outer circumferential surface of the grinding stone, and a grinding oil supply apparatus that supplies a grinding oil to a processing point and that includes a grinding oil supply nozzle separate from the fluid injection nozzle, the processing point being an abutting section of the grinding stone and the workpiece, wherein the injection port is arranged so as to face the outer circumferential surface of the grinding stone in a state capable of injecting the fluid to a position different from the processing point in a radial direction of the grinding stone among the outer circumferential surface of the grinding stone.

First claim

What is claimed is:

1. A method of manufacturing a rolling bearing that manufactures the rolling bearing with a workpiece to which a grinding process is performed, the method comprising:
performing the grinding process by pressing an outer circumferential surface of a grinding stone against the workpiece while the grinding stone is rotated and driven; and
injecting a fluid with respect to the outer circumferential surface of the grinding stone with a fluid injection apparatus that has a fluid injection nozzle including a plurality of injection ports from which the fluid is injected,
wherein the outer circumferential surface of the grinding stone has a curved surface shape in which the outer circumferential surface of the grinding stone has an outer diameter that is reduced as it goes toward both end sides in an axial direction of the grinding stone,
the fluid is linearly injected at a high pressure with respect to the outer circumferential surface of the grinding stone in a state where pressures at each of the injection ports are uniform with each other, and
the injection ports are formed so that distances between each of the injection ports and the outer circumferential surface of the grinding stone having the curved surface shape are equal in a state where the injection ports are facing the outer circumferential surface of the grinding stone.

2. The method of manufacturing a rolling bearing according to claim 1 ,
wherein directions of central axes of the injection ports are parallel with each other.

3. The method of manufacturing a rolling bearing according to claim 2 ,
wherein the directions of the central axes of the injection ports coincide with a radial direction of the grinding stone.

4. The method of manufacturing a rolling bearing according to claim 1 ,
wherein the grinding stone includes a first edge and a second edge in the axial direction of the grinding stone, and
a distance between the first edge and the second edge of the grinding stone is greater than a distance between an outermost injection port formed at a first end among the injection ports in the axial direction of the grinding stone and an outermost injection port formed at a second end among the injection ports in the axial direction of the grinding stone.

5. The method of manufacturing a rolling bearing according to claim 4 ,
wherein a concave section is provided at the fluid injection nozzle, the concave section having a width less than the distance between the first edge and the second edge of the grinding stone in the axial direction of the grinding stone and being formed along the outer circumferential surface of the grinding stone having the curved surface shape, and
the injection ports are formed within the concave section.

Assignees

• Nsk Ltd

Inventors

• UTADA Eiji
• Egami Kazutaka

Classifications

• F16C33/64

  Special methods of manufacture · CPC title

• B24B5/40

  for grinding tubes internally · CPC title

• F16C2220/70

  by grinding · CPC title

• B24B5/06

  for grinding cylindrical surfaces internally (B24B5/40 takes precedence) · CPC title

• B24B55/02

  Equipment for cooling the grinding surfaces, e.g. devices for feeding coolant (cooling or lubricating during dressing operation B24B53/095; incorporated in grinding wheels B24D) · CPC title