Title:
プレス成形方法
Document Type and Number:
Japanese Patent JP6690605
Kind Code:
B2
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.
Inventors:
Osamu Kondo
Application Number:
JP2017132445A
Publication Date:
April 28, 2020
Filing Date:
July 06, 2017
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
B21D22/26; B21D28/00
Domestic Patent References:
| JP2011045905A | ||||
| JP64066024A |
Foreign References:
| WO2014050973A1 |
Attorney, Agent or Firm:
Toshihiko Ishikawa