Title:
METHOD FOR MANUFACTURING ANNULAR MEMBER
Document Type and Number:
WIPO Patent Application WO/2015/079684
Kind Code:
A1
Abstract:
Provided is a method for manufacturing an annular member with good yield and high dimensional accuracy. This present invention accordingly includes a cylindrical member forming step for forming a circularly shaped cylindrical member (4) from a round bar material (1), and a cutting and separation step. In said cutting and separation step, the cylindrical member (4) is caused to rotate, and the cylindrical member (4) is cut and separated in the axial direction to obtain a plurality of annular members (5) by the shear force produced by restricting molds (14a, 14b, 14c), which are some of a plurality of restricting molds (14, 15) provided on the inner and outer peripheral surface sides of the cylindrical member (4) along the axial direction thereof. The restricting molds (14a, 14c) apply an urging force to the outer peripheral surface of the cylindrical member (4), and the restricting mold (14b) is provided to the outer peripheral surface of the cylindrical member (4) across a gap.
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Inventors:
KOBAYASHI KAZUTO (JP)
YASUDA YUU (JP)
YASUDA YUU (JP)
Application Number:
PCT/JP2014/005915
Publication Date:
June 04, 2015
Filing Date:
November 26, 2014
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
B23D21/00; B21H1/06; B21K1/04; B23D21/04; B23P13/00
Foreign References:
| JPS5019082A | 1975-02-28 | |||
| JP2011131251A | 2011-07-07 | |||
| JPH11197951A | 1999-07-27 | |||
| JPH1133818A | 1999-02-09 | |||
| JPS5882617A | 1983-05-18 | |||
| JP2009082930A | 2009-04-23 | |||
| JPH03120318U | 1991-12-11 | |||
| US0771752A | 1904-10-04 | |||
| JPH09512487A | 1997-12-16 | |||
| JPS4922022A | 1974-02-27 | |||
| JPH04210318A | 1992-07-31 | |||
| JP2004209565A | 2004-07-29 |
Other References:
See also references of EP 3075478A4
Attorney, Agent or Firm:
MORI, Tetsuya et al. (JP)
Woods Tetsuya (JP)
Woods Tetsuya (JP)
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