METHOD FOR PRODUCING CURVED ARTICLE AND SKELETON STRUCTURE MEMBER FOR AUTOMOBILE BODY SHELL

Title:

METHOD FOR PRODUCING CURVED ARTICLE AND SKELETON STRUCTURE MEMBER FOR AUTOMOBILE BODY SHELL

Document Type and Number:

WIPO Patent Application WO/2014/042067

Kind Code:

A1

Abstract:

The present invention produces a curved article (10) having a hat-shaped cross section by means of press molding without generating cracks or wrinkles. When producing by means of press molding a curved article (10) having a roughly hat-shaped cross section comprising a top plate (11), vertical walls (12a, 12b) extending in parallel to each other along the ridge line (14a, 14b) of the top plate, and outward-facing flanges (13a, 13b) joined to the tips of the vertical walls, a starting material metal plate (601) is sandwiched and bound by a die (502) and a blank holder (505) and press molded while the starting material metal plate (601) is sandwiched and bound by a pad (503) and a punch (504).

Inventors:

ASO TOSHIMITSU (JP)
TANAKA YASUHARU (JP)
MIYAGI TAKASHI (JP)
OGAWA MISAO (JP)
KAWANO KAZUYUKI (JP)

Application Number:

PCT/JP2013/073946

Publication Date:

March 20, 2014

Filing Date:

September 05, 2013

Export Citation:

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Assignee:

NIPPON STEEL & SUMITOMO METAL CORP (JP)

International Classes:

B21D22/26; B21D24/08; B21D5/01

Domestic Patent References:

WO2011145679A1

2011-11-24

Foreign References:

JP2009241109A	2009-10-22
JP2009255116A	2009-11-05
JPS56117831A	1981-09-16
JPH10225723A	1998-08-25
JPS57165125A	1982-10-12
JP2005262309A	2005-09-29
JP2004154786A	2004-06-03
JP2003103306A	2003-04-08
JP2004154859A	2004-06-03
JP2006015404A	2006-01-19
JP2008307557A	2008-12-25

Other References: