Title:
PRESS-FORMING METHOD
Document Type and Number:
Japanese Patent JP2014161911
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To obtain a press-forming method in which the problem of wrinkle generation in shrinking flange forming can be solved fundamentally without adverse effect on a finished product.SOLUTION: The press-forming method of the invention is a press-forming method in which a formed component including a top plate part 5 that includes a convex outer peripheral edge 3 projecting outside partially and a flange part 7 that is formed by bending-forming along the convex outer peripheral edge 3 in the top plate part 5 is press-formed, and comprises a first forming process which forms, at the part in a blank 9 where the flange part 7 is to be formed, an intermediate shape component 15 including a vertical wall part 11 that becomes a part of the flange part 7 and a valley-shaped part 13 that is folded from the vertical wall part 11 to the outside and is concave at the top plate part side, and a second forming process which forms the flange part by bending-forming the portion including the valley-shaped part 13 of the intermediate shape component 15 formed in the first forming process.
Inventors:
URABE MASAKI
Application Number:
JP2013038314A
Publication Date:
September 08, 2014
Filing Date:
February 28, 2013
Export Citation:
Assignee:
JFE STEEL CORP
International Classes:
B21D22/26; B21D19/08
Domestic Patent References:
| JP2004188445A | 2004-07-08 | |||
| JPS62107827A | 1987-05-19 | |||
| JPS6127125A | 1986-02-06 | |||
| JP2007253173A | 2007-10-04 | |||
| JPH0739954A | 1995-02-10 | |||
| JP2010201486A | 2010-09-16 |
Attorney, Agent or Firm:
Toshihiko Ishikawa