A manufacturing method and a press forming device of the structure member for the automobile bodies

Japanese Patent JP6032373

B2

To reduce the generation of cracking in the edge of the ridge flange (7a, 7b) and wrinkling near the base of the ridge flange and can suppress an increase in the pad load, while press forming the structural member (1) that is made of a high-tensile steel sheet or a thick steel sheet and that has a substantially gutter-shaped cross section and an outward continuous flange in an end of the structural member. A method for manufacturing the structural member (1), the method including: a first step in which the pad (15, 15A, 15B, 15C, 21) presses the forming material (16) against the punch (13) to raise a portion corresponding to a flange to be formed in ends of at least the gutter bottom (2) and the ridge (3a, 3b) in a direction opposite to the pressing direction, the pad (15, 15A, 15B, 15C, 21) bends an end of a portion to be formed into the ridge (3a, 3b) in the pressing direction and restrains at least a part of the end, and the punch (13) and the die (14) carry out press forming to form an intermediate product while a region other than an end in a portion to be formed into the gutter bottom (2) remains unrestrained.

Yasuhiro Ito
Ryuichi Nishimura
Kenichiro Otsuka
Yoshiaki Nakazawa

JP2015541493A

November 30, 2016

September 10, 2014

Click for automatic bibliography generation  

Nippon Steel & Sumitomo Metal Corporation

B21D22/26; B21D22/20; B21D24/00

JP2013174004A	2013-09-05
JPH0523761A	1993-02-02
JP5569661B2	2014-08-13

WO2012160697A1	2012-11-29
DE102004018897A1	2005-11-10
WO2013154114A1	2013-10-17
WO2014148618A1	2014-09-25

Miaki Kametani
Tetsuo Kanamoto
Koji Hagiwara
Kazuki Matsumoto

Previous Patent: A purging device and a purging method

Next Patent: JPS6032374