Title:
WARM PRESS FORMING METHOD AND AUTOMOBILE FRAME COMPONENT
Document Type and Number:
WIPO Patent Application WO/2013/132823
Kind Code:
A1
Abstract:
By the present invention, during forming of a steel sheet having a tensile strength of 400 MPa or greater into a press-formed part comprising a flange part and other portions by press forming, by heating the steel sheet to a temperature range of 400-700°C and then press forming the heated steel sheet using crash forming, at which time the average temperature difference between the flange part and the other portions of the press-formed part immediately after forming is kept to within 100°C, shape changes such as springback can be suppressed, the dimensional precision of a panel can be enhanced, and the desired mechanical characteristics can easily be obtained in the press-formed part.
Inventors:
TAMAI YOSHIKIYO (JP)
TOKITA YUICHI (JP)
MINOTE TORU (JP)
FUJITA TAKESHI (JP)
TOKITA YUICHI (JP)
MINOTE TORU (JP)
FUJITA TAKESHI (JP)
Application Number:
PCT/JP2013/001318
Publication Date:
September 12, 2013
Filing Date:
March 04, 2013
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B21D22/21; B21D22/20; B21D22/26; C21D9/00; C21D9/46; C22C38/00; C22C38/14; C22C38/60
Foreign References:
| JP2011219826A | 2011-11-04 | |||
| JP2003113442A | 2003-04-18 | |||
| JP2002143935A | 2002-05-21 | |||
| JP2010188393A | 2010-09-02 | |||
| JP2013023721A | 2013-02-04 | |||
| JP2005205416A | 2005-08-04 |
Other References:
See also references of EP 2823904A4
Attorney, Agent or Firm:
SUGIMURA, KENJI (JP)
Kenji Sugimura (JP)
Kenji Sugimura (JP)
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Claims: