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Title:
METHOD FOR MANUFACTURING METAL FITTING, METHOD FOR MANUFACTURING SPARK PLUG, AND METHOD FOR MANUFACTURING SENSOR
Document Type and Number:
Japanese Patent JP2016010802
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To reduce cost of manufacture in a method for manufacturing a metal fitting.SOLUTION: The method for manufacturing a metal fitting including a tool engaging part with which a tool engages includes a cold-forging step. The cold-forging step includes the steps of: (a) forming a trunk part having a first maximum length and a root part having a second maximum length longer than the first maximum length and continued to the trunk part; and (b)forming the tool engaging part by drawing at least part of the root part in an axial direction.

Inventors:
OCHIAI SATORU
Application Number:
JP2014132790A
Publication Date:
January 21, 2016
Filing Date:
June 27, 2014
Export Citation:
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Assignee:
NGK SPARK PLUG CO
International Classes:
B21J5/12; B21J5/06; B21K21/08
Domestic Patent References:
JP2005238243A2005-09-08
JP2013043200A2013-03-04
JP2002011543A2002-01-15
JP2003311367A2003-11-05
JP2005238243A2005-09-08
JP2013043200A2013-03-04
JP2002011543A2002-01-15
JP2003311367A2003-11-05
JPH0716693A1995-01-20
JP2009095854A2009-05-07
JPH07275992A1995-10-24
Attorney, Agent or Firm:
Meisei International Patent Office



 
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