Processing method and bearing

Patent metadata

Field	Value
Publication number	US-9427832-B2
Application number	US-201013503878-A
Country	US
Kind code	B2
Filing date	Nov 19, 2010
Priority date	Dec 2, 2009
Publication date	Aug 30, 2016
Grant date	Aug 30, 2016

Abstract

A processing method for a bearing is capable of shortening a lead time without the need for carrying out super finishing (mirror grinding). A component of a bearing is finished while chucking the component by a chucking device. Hardened steel cutting and grinding are carried out while chucking the component without releasing the chucking by the chucking device.

First claim

The invention claimed is:

1. A processing method for finishing an inner race of a bearing, the processing method comprising:
hardened steel cutting a hardened rolling surface of an outer surface of the inner race, in a state where the hardened rolling surface of the outer surface of the inner race has a machining allowance of 100 μm or less remaining as a finish grinding allowance, while chucking the inner race by a chucking device;
finish grinding the hardened rolling surface of the inner race, while chucking the inner race by the chucking device, the finish grinding removing a damage layer generated by the hardened steel cutting of the hardened rolling surface; and
hardened steel cutting on an inner surface of the inner race, which is a portion excluding the hardened rolling surface,
wherein the hardened steel cutting on the inner surface and the finish grinding of the hardened rolling surface occur simultaneously without releasing the chucking of the inner race by the chucking device, so that a damaged layer generated by the hardened steel cutting the of the hardened rolling surface is removed by the finish grinding.

2. A processing method for finishing an outer race of a bearing, the processing method comprising:
hardened steel cutting a hardened rolling surface of an inner surface of the outer race, in a state where the hardened rolling surface of the outer surface of the inner race has a machining allowance of 100 μm or less remaining as a finish grinding allowance, while chucking the inner race by a chucking device;
finish grinding the hardened rolling surface of the outer race, while chucking the outer race by the chucking device, the finish grinding removing a damage layer generated by the hardened steel cutting of the hardened rolling surface; and
hardened steel cutting on an outer surface of the outer race, which is a portion excluding the hardened rolling surface,
wherein the hardened steel cutting on the outer surface and the finish grinding of the hardened rolling surface occur simultaneously without releasing the chucking of the outer race by the chucking device, so that a damaged layer generated by the hardened steel cutting the of the hardened rolling surface is removed by the finish grinding.

Assignees

• Akimoto Shogo
• Nishiki Taku
• Ntn Toyo Bearing Co Ltd

Inventors

• Akimoto Shogo
• Nishiki Taku

Classifications

• B23B2228/24

  Hard, i.e. after being hardened · CPC title

• B23P15/003 Primary

  bearings (see also F16C33/00) · CPC title

• B24B19/06

  for grinding races, e.g. roller races · CPC title

• F16C33/64 Primary

  Special methods of manufacture · CPC title

• F16C19/364

  with tapered rollers, i.e. rollers having essentially the shape of a truncated cone · CPC title