Title:
プレス部品の製造方法及び下金型の設計方法
Document Type and Number:
Japanese Patent JP6919690
Kind Code:
B2
Abstract:
To provide a lower die shape capable of inhibiting wrinkles from being formed due to shrinkage deformation of a flange part.SOLUTION: This method includes a bending forming step of bending-forming a side wall part 11 and a flange part 12 by press-working a blank by upper and lower dies. When bending forming is performed by making a setting so as to bring the lower die into contact with the whole undersurface of an area serving as the flange part 12 of the blank, the bending forming is performed by making a setting so that the lower die can assume such a shape as to be brought into noncontact with a noncontact area serving as a part of the flange part 12 including at least a wrinkle formation area 14, in the case where it is estimated that wrinkles may be formed in the flange part after the bending forming.SELECTED DRAWING: Figure 1
More Like This:
Inventors:
Takeshi Ogawa
Eiji Iizuka
Yusuke Fujii
Eiji Iizuka
Yusuke Fujii
Application Number:
JP2019173146A
Publication Date:
August 18, 2021
Filing Date:
September 24, 2019
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
B21D22/20; B21D22/00; B21D22/26; B21D24/00
Domestic Patent References:
| JP5987942B1 | ||||
| JP6011680B1 | ||||
| JP2015107520A | ||||
| JP2015027698A | ||||
| JP2017100165A | ||||
| JP2013169578A |
Foreign References:
| WO2015053035A1 |
Attorney, Agent or Firm:
Hide Tanaka Tetsu
Ichi Hirose
Toru Miyasaka
Tetsuya Mori
Ichi Hirose
Toru Miyasaka
Tetsuya Mori