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Title:
DEVICE FOR MANUFACTURING FORGED CRANKSHAFT
Document Type and Number:
WIPO Patent Application WO/2016/182065
Kind Code:
A1
Abstract:
A device for manufacturing a forged crankshaft is provided with upper and lower pair of molds (10) and a first tool (20). The molds (10) perform processing for deforming first excessively thick parts (Aaa, Aba) and increasing the thickness of both side parts in the vicinity of a rough pin part (P') for a rough crank arm part (A'). The first tool (20) is accommodated in an opening part (10b) of the molds (10) and comes into contact with the surface except for a region on both side parts in the vicinity of a rough pin part (P') in the surface on a rough journal part (J') side of the rough crank arm part (A'). The molds (10) and the first tool (20) each have a first guide part for guiding the first tool (20) from a retracted position to a contact position. At least one of the upper surface (20b) and the lower surface (20c) of the first tool (20) is provided with the first guide part.

Inventors:
YAMASHITA, Tomohisa (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
TAKAMOTO, Sho (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
KUROKAWA, Hiroyuki (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
YABUNO, Kunihiro (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
YOSHINO, Ken (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
TAMURA, Kenji (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
OKUBO, Junichi (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
Application Number:
JP2016/064308
Publication Date:
November 17, 2016
Filing Date:
May 13, 2016
Export Citation:
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Assignee:
NIPPON STEEL & SUMITOMO METAL CORPORATION (6-1 Marunouchi 2-chome, Chiyoda-ku Tokyo, 71, 〒1008071, JP)
International Classes:
B21K1/08; F16C3/08
Domestic Patent References:
WO2015056440A12015-04-23
WO2015075924A12015-05-28
WO2016009620A12016-01-21
Foreign References:
JP2015071179A2015-04-16
JP2015186815A2015-10-29
Attorney, Agent or Firm:
ASCEND IP LAW FIRM (5-17, Dojima 1-chome Kita-ku, Osaka-sh, Osaka 03, 〒5300003, JP)
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