Title:
A manufacturing method and a press forming device of a press-forming object
Document Type and Number:
Japanese Patent JP6032374
Kind Code:
B2
Abstract:
[Object] In forming a press-formed product (10) that is made of a high-tensile steel sheet having a tensile strength of 390 MPa or more, and has a substantially gutter-shaped cross section and an outward continuous flange (16), wrinkling in ridges (12a, 12b) and cracking in the outward continuous flange are reduced. [Solution] A method for manufacturing a press-formed product (10) that is made of a high-tensile steel sheet of 390 MPa or more, and has a substantially gutter-shaped cross section and an outward continuous flange (16) in at least one end in a predetermined direction includes a first step in which, after a first pad (34-1) restrains at least a part of a portion to be formed into a gutter bottom (11) in a forming material (33), a second pad (34-2) restrains at least a part of the end of portions to be formed into ridges (12a, 12b) and subsequently carries out press forming.
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| JPS6061122 | FORMING METHOD OF SHADOW MASK |
| JP3383525 | PRESS MACHINE AND PRESSING METHOD |
Inventors:
Kenichiro Otsuka
Yoshiaki Nakazawa
Ryuichi Nishimura
Yasuhiro Ito
Yoshiaki Nakazawa
Ryuichi Nishimura
Yasuhiro Ito
Application Number:
JP2015541494A
Publication Date:
November 30, 2016
Filing Date:
September 10, 2014
Export Citation:
Assignee:
Nippon Steel & Sumitomo Metal Corporation
International Classes:
B21D22/26; B21D5/01; B21D22/20; B21D24/00
Domestic Patent References:
| JP2013174004A | 2013-09-05 | |||
| JPH0523761A | 1993-02-02 | |||
| JP5569661B2 | 2014-08-13 |
Foreign References:
| WO2012160697A1 | 2012-11-29 | |||
| DE102004018897A1 | 2005-11-10 | |||
| WO2013154114A1 | 2013-10-17 | |||
| WO2014148618A1 | 2014-09-25 |
Attorney, Agent or Firm:
Miaki Kametani
Tetsuo Kanamoto
Koji Hagiwara
Kazuki Matsumoto
Tetsuo Kanamoto
Koji Hagiwara
Kazuki Matsumoto