Title:
RACE RING FOR ROLLING BEARING, AND ROLLING BEARING
Document Type and Number:
WIPO Patent Application WO/2012/070383
Kind Code:
A1
Abstract:
To make it possible to mass-produce a race ring that has high accuracy and high strength at low cost.
Provided is an outer ring (1) which is composed of a metal sintered body (10') that is formed by sintering a powder compact (10) of a starting material powder that is mainly composed of a metal powder. The inner diameter surface of the outer ring (1) is provided with a race surface (2) where a rolling body rolls, and the race surface (2) is formed by subjecting the inner diameter surface of the metal sintered body (10') formed on a cylindrical surface that has no projections or recesses to plastic working. In addition, sealing grooves (3, 3) provided on both sides of the race surface (2) in the axial direction are formed by processing the inner diameter surface of the metal sintered body (10') formed on the cylindrical surface that has no projections or recesses. The outer ring (1) has a relative density of 80% or more but less than 100%.
Inventors:
MORI NATSUHIKO (JP)
NODA HIROYUKI (JP)
HIRADE JUN (JP)
OKUNO TAKAHIRO (JP)
JINNOU MAKOTO (JP)
NODA HIROYUKI (JP)
HIRADE JUN (JP)
OKUNO TAKAHIRO (JP)
JINNOU MAKOTO (JP)
Application Number:
PCT/JP2011/075721
Publication Date:
May 31, 2012
Filing Date:
November 08, 2011
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
MORI NATSUHIKO (JP)
NODA HIROYUKI (JP)
HIRADE JUN (JP)
OKUNO TAKAHIRO (JP)
JINNOU MAKOTO (JP)
MORI NATSUHIKO (JP)
NODA HIROYUKI (JP)
HIRADE JUN (JP)
OKUNO TAKAHIRO (JP)
JINNOU MAKOTO (JP)
International Classes:
B22F5/00; B22F3/24; C21D9/40; C22C33/02; C22C38/00; C22C38/22; F16C33/64; B22F3/02; C21D1/06
Foreign References:
| JP2007231966A | 2007-09-13 | |||
| JP2004308917A | 2004-11-04 | |||
| JP2002257145A | 2002-09-11 |
Attorney, Agent or Firm:
SHIROMURA Kunihiko et al. (JP)
Kunihiko Shiromura (JP)
Kunihiko Shiromura (JP)
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Claims: