SHELL-TYPE RADIAL NEEDLE BEARING OUTER RING AND METHOD FOR MANUFACTURING SAME

Title:

SHELL-TYPE RADIAL NEEDLE BEARING OUTER RING AND METHOD FOR MANUFACTURING SAME

Document Type and Number:

WIPO Patent Application WO/2012/043392

Kind Code:

A1

Abstract:

In a shell-type radial needle bearing outer ring (6a) having a cylindrical shape with a bottom, without incurring a cost increase, the bottom plate portion (9a) thereof and the continuous portion between the bottom plate portion (9a) and the cylindrical portion (8a) are improved in fatigue strength, and the anti-rust performance of the outer ring (6a) and the performance for retaining the outer ring (6a) are also improved. After an intermediate material (35) having a cylindrical portion and a bottom plate portion is obtained from a metal material, shot peening is performed on the intermediate material (35) to produce a residual compressive stress in the outer surface side surfaces and surface layer portions of the cylindrical portion (8a) and the bottom plate portion (9a). The residual compressive stress in the outer surface side surface layer portions is made larger than that in the inner surface side surface layer portions and is set to 700 to 1600 MPa in the region from the surfaces to a depth of 0.03 mm.

Inventors:

HIGUCHI MASATO (JP)
TAKEO NORIYUKI (JP)
KOMURA YOSHIAKI (JP)

Application Number:

PCT/JP2011/071656

Publication Date:

April 05, 2012

Filing Date:

September 22, 2011

Export Citation:

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Assignee:

NSK LTD (JP)
HIGUCHI MASATO (JP)
TAKEO NORIYUKI (JP)
KOMURA YOSHIAKI (JP)

International Classes:

F16C33/58; F16C19/46; F16C33/64; F16D3/41

Foreign References:

JP2010159805A	2010-07-22
JPH06280890A	1994-10-07
JPS5335841A	1978-04-03
JP2007032801A	2007-02-08
JP2009191976A	2009-08-27
JP2008309312A	2008-12-25
JPH07228101A	1995-08-29
JPH0362232A	1991-03-18
JPH0414819A	1992-01-20
JP2006125513A	2006-05-18
JP2008188610A	2008-08-21

Other References: