METHOD FOR MANUFACTURING FORGED CRANKSHAFT - NIPPON STEEL & SUMITOMO METAL CORP

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 (JP)
OKUBO JUNICHI (JP)

Application Number:

PCT/JP2016/088137

Publication Date:

June 29, 2017

Filing Date:

December 21, 2016

Export Citation:

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Assignee:

NIPPON STEEL & SUMITOMO METAL CORP (JP)

International Classes:

B21K1/08; B21J5/02; F16C3/08

Domestic Patent References:

WO2014038183A1	2014-03-13
WO2014038183A1	2014-03-13

Foreign References:

JPS5945051A	1984-03-13
JPS5945052A	1984-03-13
JPH05228574A	1993-09-07
JP2001105087A	2001-04-17
JPH02255240A	1990-10-16
JPS62244545A	1987-10-24

Other References: