Title:
METHOD AND APPARATUS FOR MANUFACTURING STEPPED MEMBER
Document Type and Number:
WIPO Patent Application WO/2016/181660
Kind Code:
A1
Abstract:
A method and an apparatus for manufacturing a stepped member are provided. An intermediate portion of a shaft workpiece is radially enlarged while being compressed in an axial direction by applying alternating load to the intermediate portion in a direction intersecting the axial direction in a state in which pressure that compresses the shaft workpiece in the axial direction is applied to both ends of the shaft workpiece. The enlarged intermediate portion of the shaft workpiece is cut in a direction perpendicular to the axial direction so that the shaft workpiece is divided into two stepped members. Each of the stepped members has a shaft portion and a head portion provided at an axial end of the shaft portion, and the head portion has a larger diameter than the shaft portion.
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Inventors:
KUWAHARA YOSHITAKA (JP)
MORI KAZUKI (JP)
IKEDA TAKASHI (JP)
IKUTA FUMIAKI (JP)
MORI KAZUKI (JP)
IKEDA TAKASHI (JP)
IKUTA FUMIAKI (JP)
Application Number:
PCT/JP2016/002353
Publication Date:
November 17, 2016
Filing Date:
May 13, 2016
Export Citation:
Assignee:
NETUREN CO LTD (JP)
International Classes:
B21K23/04; B21J5/08; B21K1/12
Foreign References:
| JP2012229714A | 2012-11-22 | |||
| JP2007260730A | 2007-10-11 | |||
| FR2651452A1 | 1991-03-08 | |||
| JP2003334633A | 2003-11-25 | |||
| JPH10323735A | 1998-12-08 | |||
| JP2013099771A | 2013-05-23 | |||
| JP2012229714A | 2012-11-22 |
Attorney, Agent or Firm:
TAKAMATSU, Takeshi et al. (Toranomon East Bldg. 9F 7-13, Nishi-Shimbashi 1-chome, Minato-k, Tokyo 03, JP)
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