PRESS-MOLDED ARTICLE, AND METHOD AND EQUIPMENT LINE FOR MANUFACTURING PRESS-MOLDED ARTICLE

WIPO Patent Application WO/2016/121358

A1

The method for manufacturing a press-molded article according to the present invention, the press-molded article being provided with a pair of flat sections and a bend section connecting the flat sections, the bend radius of the bend section being R2 (mm) and the interior angle formed by the pair of flat sections being θ2 (°), includes a preparation step, a first molding step, and a second molding step. In the preparation step, a metal plate having a tensile strength of 590 MPa or greater is prepared. In the first molding step, an intermediate molded article (36) provided with a bend section having a bend radius of R1 (mm) and an interior angle of θ1 (°) is molded. In the second molding step, a portion of a bend section (36c) of the intermediate molded article (36) is molded into the bend section of the press-molded article. The bend radius R1, the interior angle θ1, the bend radius R2, and the interior angle θ2 satisfy the conditions of expressions (1)-(3). (1): 1.05 < A1/A2. (2): 1.0 < R2/R2. (3): A1/A2 < 6.0/(R1/R2). In the above expressions, A1 (°) is the angle supplementary to the interior angle θ1 of the intermediate molded article, and A2 (°) is the angle supplementary to the interior angle θ2 of the press-molded article.

OTSUKA KENICHIRO (JP)
NAKAZAWA YOSHIAKI (JP)
NISHIMURA RYUICHI (JP)
SAITO MASAHIRO (JP)

PCT/JP2016/000338

August 04, 2016

January 25, 2016

Click for automatic bibliography generation  

NIPPON STEEL & SUMITOMO METAL CORP (JP)

B21D22/26; B21D5/01; B21D22/20

WO2012161050A1

2012-11-29

JP2012115868A	2012-06-21
JP2004181502A	2004-07-02
JPH05317971A	1993-12-03

See also references of EP 3251770A4

ASCEND IP LAW FIRM (JP)
アセンド patent business corporation (JP)

View/Download PDF      PDF Help

Previous Patent: BATTERY PACK

Next Patent: METHOD FOR PRODUCING COATED METAL STRIP