Title:
プレス加工方法
Document Type and Number:
Japanese Patent JP6551523
Kind Code:
B2
Abstract:
[Solution] Provided is a press-working apparatus configured to provide a molded product by performing press working on a work, the molded product including, in a cross-section, a U-shaped portion including a bottom, a wall, and a punch-nose between the bottom and the wall, the press-working apparatus including: a die in which a recessed portion to receive the U-shaped portion is formed; a first punch that sandwiches a central area of the bottom with a bottom surface of the recessed portion; and a second punch that is pushed into the recessed portion later than the first punch, to restrain the wall between the second punch and a side surface of the recessed portion, and sandwich the work with the bottom surface to mold a peripheral area of the bottom and the punch-nose. A sandwiching width of the first punch that sandwiches the central area of the bottom and a setback amount of the second punch from the first punch in a push-in direction are set on the basis of a target sheet thickness of the punch-nose.
Inventors:
Shinkawa Yoshikawa
Yasuhiro Ito
Shigeru Yonemura
Toru Yoshida
Yasuhiro Ito
Shigeru Yonemura
Toru Yoshida
Application Number:
JP2017515606A
Publication Date:
July 31, 2019
Filing Date:
April 28, 2016
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
B21D22/26; B21D24/00
Domestic Patent References:
| JP2004098153A | ||||
| JP2009248092A | ||||
| JP9295088A | ||||
| JP2010137261A | ||||
| JP2001198641A | ||||
| JP2007111725A | ||||
| JP6218442A |
Foreign References:
| WO2014185357A1 | ||||
| WO2014065290A1 | ||||
| US20080309834 |
Attorney, Agent or Firm:
Patents corporation Blitas