Title:
PRESS FORMING METHOD AND TOOL OF PRESS FORMING
Document Type and Number:
WIPO Patent Application WO/2016/194503
Kind Code:
A1
Abstract:
Provided is a press forming method that forms, by a punch (3) and a die (5), a press formed product having a top portion and an inclined wall portion continuing to at least one side of the top portion and being curved into a convex shape on the inclined wall portion side in the longitudinal direction of the press formed product in a plane view, wherein the method includes a first step for shaping a blank (9) by relative movement of the die (5) to the punch (3) side in a state wherein a die shoulder portion is in contact with a site corresponding to the inclined wall portion in the blank (9), a second step for grasping and holding a site more to the end part side than the site corresponding to the inclined wall portion in the blank (9) with the die (5) and the punch (3), and a third step for forming the inclined wall portion by relative movement of the die (5) to the forming bottom dead center on the punch (3) side in a state wherein the site on the end part side is grasped and held.
Inventors:
AGEBA RYO (JP)
ISHIWATARI AKINOBU (JP)
HIRAMOTO JIRO (JP)
ISHIWATARI AKINOBU (JP)
HIRAMOTO JIRO (JP)
Application Number:
PCT/JP2016/062469
Publication Date:
December 08, 2016
Filing Date:
April 20, 2016
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B21D22/26; B21D22/20
Foreign References:
| JP2015027698A | 2015-02-12 | |||
| JP5382281B1 | 2014-01-08 |
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
Patent business corporation Sakai international patent firm (JP)
Patent business corporation Sakai international patent firm (JP)
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