Title:
PRESS FORMING METHOD
Document Type and Number:
WIPO Patent Application WO/2019/008880
Kind Code:
A1
Abstract:
This press forming method is for press forming a T-shaped part 1 having a top portion 3 connected via a connecting portion 13 for a vertical top portion 9 and a horizontal top portion 11, a wall portion 5 formed from the vertical top portion 9 of the top portion 3 to the horizontal top portion 11 via the connecting portion 13, and a flange part 7 formed continuously at the lower edge of the wall portion 5, said press forming method being characterized by: comprising a first forming step for drawing to an intermediate shaped part 21 having a protruding shaped portion 15 formed on the connecting portion 13, a trimming step for obtaining a trimmed part 41 by trimming the intermediate shaped part 21, and a second forming step for forming the T-shaped part 1 in a target shape by form shaping the trimmed part 41; and, in the second forming step, flattening the protruding shaped portion 15 and allowing material to flow into the wall portion 5a continuous from the connecting portion 13.
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Inventors:
KONDO OSAMU (JP)
Application Number:
PCT/JP2018/016818
Publication Date:
January 10, 2019
Filing Date:
April 25, 2018
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B21D22/26; B21D28/00; B21D53/88
Domestic Patent References:
| WO2014050973A1 | 2014-04-03 | |||
| WO2017002253A1 | 2017-01-05 |
Foreign References:
| JP2011045905A | 2011-03-10 | |||
| JPS6466024A | 1989-03-13 | |||
| JP2008200709A | 2008-09-04 | |||
| JP2015110237A | 2015-06-18 | |||
| EP2524740A1 | 2012-11-21 |
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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