Title:
PRESS MOLDING DEVICE AND PRESS MOLDING METHOD
Document Type and Number:
WIPO Patent Application WO/2015/002077
Kind Code:
A1
Abstract:
This press molding device is provided with a punch (31), a blank holder (32) arranged adjacent to the punch (31), a die (41) paired with the punch (31), and a pad (42) arranged opposite of the punch (31). The punch (31) has a leading end surface (31a), an outer surface (31b) and a stepped surface (31c) having shapes corresponding respectively to the web portion, vertical wall portion and flange portion of the molded article. The center portion of the workpiece (50) in the width direction is held between the pad (42) and the punch (31), and in a state in which the outer edge of the workpiece (50) in the width direction is constrained by the blank holder (32) and the die (41), by moving the punch (31) and the die (41) relative to each other in the press direction, the outer edge of the workpiece (50) in the width direction is pulled out from between the blank holder (32) and the die (41), and the flange portion is finished by the die (41) and the stepped surface (31c) of the punch (31).
Inventors:
NISHIMURA RYUICHI (JP)
OTSUKA KENICHIRO (JP)
OGAWA KEIJI (JP)
NAKAZAWA YOSHIAKI (JP)
OTSUKA KENICHIRO (JP)
OGAWA KEIJI (JP)
NAKAZAWA YOSHIAKI (JP)
Application Number:
PCT/JP2014/067122
Publication Date:
January 08, 2015
Filing Date:
June 27, 2014
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
B21D22/21; B21D22/26; B21D24/04; B21D24/12
Foreign References:
| JP2004188474A | 2004-07-08 | |||
| JP2004154786A | 2004-06-03 | |||
| JPH05154570A | 1993-06-22 | |||
| JPS63145519U | 1988-09-26 | |||
| JP2005095925A | 2005-04-14 | |||
| JPH04190931A | 1992-07-09 | |||
| JPS63242423A | 1988-10-07 | |||
| JP2004154786A | 2004-06-03 |
Other References:
See also references of EP 3017893A4
Attorney, Agent or Firm:
KOKUBUN, Takayoshi (JP)
Takayoshi Kokubu (JP)
Takayoshi Kokubu (JP)
Download PDF: