METHOD FOR MANUFACTURING PANEL-SHAPED MOLDED ARTICLE - NIPPON STEEL & SUMITOMO METAL CORP

Title:

METHOD FOR MANUFACTURING PANEL-SHAPED MOLDED ARTICLE

Document Type and Number:

WIPO Patent Application WO/2017/159783

Kind Code:

A1

Abstract:

This method for manufacturing a panel-shaped molded article has a preparation step for preparing a blank comprising a metal plate having a tensile strength of 390 MPa to 980 Mpa inclusive, and a press-molding step for using a press machining apparatus to cold-press the blank so as to mold the blank into a panel-shaped molded article. In the press-molding step, a blank holder, a first punch, and a second punch are moved relative to a die, the first punch and the second punch are pressed into the blank, and the pressing of the second punch into the blank is completed before the pressing of the first punch into the blank.

Inventors:

OTSUKA KENICHIRO (JP)
HAMADA KOICHI (JP)
NAKAZAWA YOSHIAKI (JP)

Application Number:

PCT/JP2017/010658

Publication Date:

September 21, 2017

Filing Date:

March 16, 2017

Export Citation:

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Assignee:

NIPPON STEEL & SUMITOMO METAL CORP (JP)

International Classes:

B21D22/26; B21D22/20; B21D24/00; B21D24/04

Domestic Patent References:

WO2012147963A1

2012-11-01

Foreign References:

JP2013000780A	2013-01-07
JPH04162922A	1992-06-08
JPH0810861A	1996-01-16
JPS5962819U	1984-04-25
JP2016052766A	2016-04-14
JP2013189173A	2013-09-26
JP2001038426A	2001-02-13
JP2011147970A	2011-08-04
JP2011050971A	2011-03-17

Other References: