PRODUCTION METHOD FOR PRESS-MOLDED BODY, AND PRESS MOLDING DEVICE

Title:

PRODUCTION METHOD FOR PRESS-MOLDED BODY, AND PRESS MOLDING DEVICE

Document Type and Number:

WIPO Patent Application WO/2015/053036

Kind Code:

A1

Abstract:

The present invention suppresses wrinkles in ridge parts (12a, 12b) and cracks in an outwardly directed continuous flange (16) during the molding of a press-molded body (10) that has an approximately groove-shaped cross section, that has the outwardly directed continuous flange (16) provided thereto, and that is made from a high-tensile steel plate that has a tensile strength of 390 MPa or more. A method for producing a press-molded body (10) that has an approximately groove-shaped cross section, that has an outwardly directed continuous flange (16) on at least one end part, and that is made from a 390 MPa or greater high-tensile steel plate, the method comprising a first step that is for press molding after a first pad (34-1) restrains, with regard to a molding source material (33), at least one part of a section that is to be molded into a groove bottom part (11) and after second pads (34-2) each restrain at least one part of an end part of sections that are to be molded into ridge parts (12a, 12b).

Inventors:

OTSUKA KENICHIRO (JP)
NAKAZAWA YOSHIAKI (JP)
NISHIMURA RYUICHI (JP)
ITO YASUHIRO (JP)

Application Number:

PCT/JP2014/073972

Publication Date:

April 16, 2015

Filing Date:

September 10, 2014

Export Citation:

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Assignee:

NIPPON STEEL & SUMITOMO METAL CORP (JP)

International Classes:

B21D22/26; B21D22/20; B21D24/00; B62D25/20

Domestic Patent References:

WO2012160697A1	2012-11-29
WO2013154114A1	2013-10-17
WO2014148618A1	2014-09-25

Foreign References:

JP2013174004A	2013-09-05
DE102004018897A1	2005-11-10
JPH0523761A	1993-02-02
JP5569661B2	2014-08-13
JP4438468B2	2010-03-24
JP2009255116A	2009-11-05
JP2012051005A	2012-03-15

Other References: