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Patent Searching and Data


Title:
METHOD FOR MANUFACTURING ROCKER ARM
Document Type and Number:
Japanese Patent JP2006170136
Kind Code:
A
Abstract:

To provide a method for manufacturing a rocker arm improving manufacturing efficiency.

This manufacturing method includes a process for providing a flat palate product 12 with a prepared hole including a prepared hole 21 for a roller support shaft fixing hole; a process for bending the flat plate product 12 with the prepared hole to provide a bent product 13 with a prepared hole including a pair of both side walls 20 arranged in parallel and connection walls 30, 40 connecting the both side walls 20 and having the prepared hole 21 arranged on a pair of the both side walls 20; and a process for forming a roller support shaft fixing hole 25 by making a sizing punch 60 including an expanding part 61 of a tip shape on a tip part, having diameter larger than the prepared hole 21 at a base end side of the expanding part 61 and diameter smaller than the prepared hole 21 on the tip side penetrates through the prepared hole 21 to finish an inner circumference surface by plastically fluidizing prepared hole inner circumference part and to form the roller support fixing hole by the expanding part 61.


Inventors:
Kawatake, Yoshio
Application Number:
JP2004000366376
Publication Date:
June 29, 2006
Filing Date:
December 17, 2004
Export Citation:
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Assignee:
NAKANISHI METAL WORKS CO LTD
International Classes:
F01L1/18; B21D53/84; B21K1/12
Attorney, Agent or Firm:
清水 久義
高田 健市
清水 義仁