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Patent Searching and Data


Title:
METHOD FOR MANUFACTURING FORGED CRANKSHAFT
Document Type and Number:
WIPO Patent Application WO/2017/110887
Kind Code:
A1
Abstract:
Disclosed is a method for manufacturing a forged crankshaft. This manufacturing method includes: a pressing step for pressing a longitudinal part (first portion) of a rod-shaped member (51) by a pair of first dies (10), thereby reducing the cross-sectional area of the first portion; and an eccentricity step for imparting eccentricity to a second portion of the rod-shaped member (51) by second dies (20) while the first portion is held. The second portion is at least a part of the portion of the rod-shaped member (51) excluding the first portion. The direction of eccentricity imparted by the second dies (20) is perpendicular to both the direction of pressing by the first dies (10) and the longitudinal direction of the rod-shaped member.

Inventors:
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:
JP2016/088137
Publication Date:
June 29, 2017
Filing Date:
December 21, 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; B21J5/02; F16C3/08
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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