Title:
PRESS FORMING METHOD
Document Type and Number:
WIPO Patent Application WO/2016/136612
Kind Code:
A1
Abstract:
Provided is a press forming method for forming a final formed article having a saddle-like shape through cold press work performed on an ultra-high tensile strength steel plate. This press forming method includes: a first step (Pf) in which, while the cross-section of a top plate section (21) is maintained in a predetermined shape, an intermediate formed article (20) having a work adjusting section (20a) is formed by deforming sidewall sections (22, 23) and flange sections (24, 25) in a predetermined region (M) through cold press work performed on an ultra-high tensile strength steel plate; and a second step (Ps) in which, while the cross-section of the top plate section is maintained in a predetermined shape, at least the work adjusting section is pressed by cold press work performed on the intermediate formed article, wherein a final formed article (10) having a saddle-like shape is formed by bending the object to be formed in a direction opposite to an opening having a hat-like cross-section in at least one of the first and second steps.
Inventors:
ITO YOSHIKI (JP)
KAGITANI JIRO (JP)
NISHIHARA OSAMU (JP)
KAGITANI JIRO (JP)
NISHIHARA OSAMU (JP)
Application Number:
PCT/JP2016/054833
Publication Date:
September 01, 2016
Filing Date:
February 19, 2016
Export Citation:
Assignee:
SANGO CO LTD (JP)
International Classes:
B21D22/26; B21D5/01; B21D22/20
Domestic Patent References:
| WO2014042067A1 | 2014-03-20 |
Foreign References:
| JP2002001445A | 2002-01-08 | |||
| JP2010069490A | 2010-04-02 | |||
| JP2009073420A | 2009-04-09 | |||
| JP2008012570A | 2008-01-24 | |||
| JP2010284674A | 2010-12-24 |
Attorney, Agent or Firm:
IKEDA KAZUMA (JP)
Ikeda 1 truth (JP)
Ikeda 1 truth (JP)
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