Title:
METHOD FOR MANUFACTURING METAL FITTING, METHOD FOR MANUFACTURING SPARK PLUG, AND METHOD FOR MANUFACTURING SENSOR
Document Type and Number:
WIPO Patent Application WO/2015/198581
Kind Code:
A1
Abstract:
In order to reduce manufacturing costs in a method for manufacturing a metal fitting, this method, which is for manufacturing a metal fitting equipped with a tool engagement section in which a tool engages, is provided with a cold forging step, said cold forging step being provided with: a step (a) for forming a body section having a first maximum length, and a base section continuous with the body section and having a second maximum length greater than the first maximum length; and a step (b) for forming a tool engagement section by drawing at least a portion of the base section in the axial direction thereof.
Inventors:
OCHIAI SATORU (JP)
Application Number:
PCT/JP2015/003113
Publication Date:
December 30, 2015
Filing Date:
June 22, 2015
Export Citation:
Assignee:
NGK SPARK PLUG CO (JP)
International Classes:
B21K21/08; B21J5/06; B21J5/12
Foreign References:
JP2005238243A | 2005-09-08 | |||
JP2013043200A | 2013-03-04 | |||
JP2002011543A | 2002-01-15 | |||
JP2003311367A | 2003-11-05 | |||
US4352283A | 1982-10-05 |
Attorney, Agent or Firm:
AOKI, Noboru et al. (JP)
Aoki 昇 (JP)
Aoki 昇 (JP)
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