Title:
PRESS-MOLDED PRODUCT, METHOD FOR PRODUCING PRESS-MOLDED PRODUCT, AND DEVICE FOR PRODUCING PRESS-MOLDED PRODUCT
Document Type and Number:
WIPO Patent Application WO/2015/041009
Kind Code:
A1
Abstract:
[Problem] To provide a press-molded product having an inward-facing continuous flange, whereby it is possible to improve properties such as the joint strength between a reinforcing member and another member and durability of a vehicle body without having to create a notch on a ridge-part flange in order to prevent defects that may occur during press molding. [Solution] A metal-plate press-molded product is formed from a steel plate having a tension strength of 340 MPa or greater, and is provided with ridge parts which are formed so as to extend in a predetermined direction, first surface parts and a second surface part which are formed as an extension from both ends of the ridge line created by the ridge parts. The metal plate press-molded product is provided with an inward-facing continuous flange, in which ridge-part flanges inwardly formed on the edge parts of the ridge parts, first flanges inwardly formed on at least one region of the edge parts of the first surface parts, and a second flange inwardly formed on at least one region of the edge part of the second surface part are formed in a continuum. With regard to the plate thickness of the edge parts of the ridge-part flanges, the ridge part flanges have a plate thickness distribution containing a section that has a plate thickness equal to or greater than the central region on both side regions sandwiching the central region in the circumferential direction.
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Inventors:
NAKAZAWA YOSHIAKI (JP)
ITO YASUHIRO (JP)
ITO YASUHIRO (JP)
Application Number:
PCT/JP2014/072281
Publication Date:
March 26, 2015
Filing Date:
August 26, 2014
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
B21D22/26; B21D19/00; B21D22/20; B21D24/00
Foreign References:
| JPS60131226U | 1985-09-03 | |||
| JP2000301250A | 2000-10-31 | |||
| JPH05338504A | 1993-12-21 | |||
| FR838735A | 1939-03-14 | |||
| JP2554768B2 | 1996-11-13 | |||
| JP2560416B2 | 1996-12-04 | |||
| JPH04118118A | 1992-04-20 | |||
| JPS59144530A | 1984-08-18 | |||
| JPH01104420A | 1989-04-21 |
Other References:
See also references of EP 3031544A4
Attorney, Agent or Firm:
KAMEYA, Yoshiaki et al. (JP)
Yoshiaki Kameya (JP)
Yoshiaki Kameya (JP)
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