Title:
FLANGING METHOD
Document Type and Number:
WIPO Patent Application WO/2016/143820
Kind Code:
A1
Abstract:
When a plate-shaped member is subjected to flanging in accordance with the present invention, the following steps are performed: a punching step of punching the plate-shaped member; a hole-expanding step of subjecting the punched hole formed in the punching step to a hole-expanding process; a re-punching step of subjecting to a re-punching process a peripheral portion of the punched hole that has been pressed and expanded in the hole-expanding step; and a flange-forming step of forming a vertical wall by pressing the peripheral portion of the re-punched hole, which is the punched hole formed in the re-punching step.
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Inventors:
ISOGAI EIJI (JP)
MIKAZUKI YUTAKA (JP)
OKAMOTO RIKI (JP)
MIKAZUKI YUTAKA (JP)
OKAMOTO RIKI (JP)
Application Number:
PCT/JP2016/057371
Publication Date:
September 15, 2016
Filing Date:
March 09, 2016
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
B21D19/08
Foreign References:
| JP2001269723A | 2001-10-02 | |||
| JP2015036147A | 2015-02-23 | |||
| JP2008290085A | 2008-12-04 | |||
| JP2007075869A | 2007-03-29 | |||
| JP2013126673A | 2013-06-27 |
Other References:
See also references of EP 3248704A4
Attorney, Agent or Firm:
HAGIWARA, Yasushi et al. (JP)
Yasushi Hagiwara (JP)
Yasushi Hagiwara (JP)
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