Title:
INTERMEDIARY RACE MEMBER OF ROLLING BEARING, RACE, ROLLING BEARING AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2019/193772
Kind Code:
A1
Abstract:
A production method for a race of a rolling bearing comprising a series of steps for cutting an annular member from raw material, creating a surface hardened layer, quenching and tempering, and then polishing an inner diameter surface and an outer diameter surface of the annular member, wherein after quenching, tempering is carried out by suddenly cooling the annular member is such that the surface temperature thereof is no more than 50°C. In said manner, the following can be obtained: an intermediary member of the race of the rolling bearing in which the absolute value of the average residual stress in each location along a radial direction from a surface to a core part thereof is 0-191 MPa; the race in which an inner diameter surface and an outer diameter surface of the intermediary member is polished such that the race is highly circular; and the rolling bearing which comprises the race.
Inventors:
HIDAKA HIDEYUKI (JP)
MATOBA RIICHIRO (JP)
MIYAMOTO YUJI (JP)
MATOBA RIICHIRO (JP)
MIYAMOTO YUJI (JP)
Application Number:
PCT/JP2018/023033
Publication Date:
October 10, 2019
Filing Date:
June 15, 2018
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
F16C33/64; F16C33/62
Foreign References:
| JP2004150527A | 2004-05-27 | |||
| US20160032976A1 | 2016-02-04 | |||
| JPS63303222A | 1988-12-09 | |||
| US4191599A | 1980-03-04 | |||
| JP2008520839A | 2008-06-19 | |||
| JP2009041652A | 2009-02-26 | |||
| JP2001200851A | 2001-07-27 | |||
| JP2018070943A | 2018-05-10 | |||
| JP2018077598A | 2018-05-17 |
Other References:
See also references of EP 3779221A4
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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