METHOD AND APPARATUS FOR MANUFACTURING PRESS COMPONENT - NIPPON STEEL & SUMITOMO METAL CORP

Title:

METHOD AND APPARATUS FOR MANUFACTURING PRESS COMPONENT

Document Type and Number:

WIPO Patent Application WO/2017/006793

Kind Code:

A1

Abstract:

The purpose of the present invention is to carry out press working by a free bending method on a blank comprising an ultra high-strength steel plate and manufacture a press component without cracks in a flange on the inside peripheral side of a curved part. A press component 11 having a hat shaped cross-sectional shape and a curved part 13 is manufactured by carrying out cold press working on a blank 24 comprising an ultra high-strength steel plate with a tensile strength of 1080 MPa or higher by the free bending method disclosed in the pamphlet for International Publication No. 2011/145679. By means of press working, a material flow facilitating part 19 is disposed in the vicinity of the portion of the blank 24 to be formed into a flange 11e that is on the inside peripheral side of the curved part 13 of the press component 11, and the material flow facilitating part 19 increases the flow amount by which the portion of the blank 24 to be formed into an end part 11f of the press component 11 flows into the portion of the blank 24 to be formed into the flange 11e on the inside peripheral side of the curved part 13 of the press component 11.

Inventors:

SAITO MASAHIRO (JP)
NISHIMURA RYUICHI (JP)
TANAKA YASUHARU (JP)
MIYAGI TAKASHI (JP)
YAMAMOTO TAKASHI (JP)

Application Number:

PCT/JP2016/069009

Publication Date:

January 12, 2017

Filing Date:

June 27, 2016

Export Citation:

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Assignee:

NIPPON STEEL & SUMITOMO METAL CORP (JP)

International Classes:

B21D22/26; B21D22/02; B21D24/00; B21D24/04

Domestic Patent References:

WO2011145679A1	2011-11-24
WO2014185428A1	2014-11-20

Foreign References:

JP2014117728A	2014-06-30
JPH06218440A	1994-08-09

Other References: