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Title:
METHOD FOR MANUFACTURING CONNECTING ROD, AND COINING DIE APPARATUS USED THEREFOR
Document Type and Number:
Japanese Patent JP2010201495
Kind Code:
A
Abstract:

To provide a method for manufacturing a connecting rod capable of increasing the cross-section secondary moment of a rod part by the coining operation, and achieving the high buckling strength of the rod part.

When manufacturing a connecting rod by executing the coining operation to a hot-forged material 10B, a sealed closing type coining die 40 having an upper forming die 46, a lower forming die 52 and a pair of right and left side forming dies 58, 60 is used as a coining die of a rod part 20. During the coining operation, the rod part 20 is vertically held by the upper and lower forming dies 46, 52, the rod part 20 is held in the right-to-left direction by the pair of side forming dies 58, 60. The rod part 20 is simultaneously pressed from four faces of the upper and lower faces and the right and left faces to execute the work-hardening by imparting the shape correction and the strain of the rod part 20.


Inventors:
KARIYA HIROYUKI
SONE KENJI
YAMAGUCHI KATSUYA
FUJIWARA MASANAO
YOSHIDA HIROAKI
Application Number:
JP2009052695A
Publication Date:
September 16, 2010
Filing Date:
March 05, 2009
Export Citation:
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Assignee:
SANYO MACHINE WORKS
DAIDO STEEL CO LTD
International Classes:
B21K1/14; B21J5/02; B21J5/06; F16C7/02
Domestic Patent References:
JP2006142355A2006-06-08
JPH01233034A1989-09-18
JP2005014079A2005-01-20
JP2006142355A2006-06-08
Attorney, Agent or Firm:
Kazuo Yoshida