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Title:
AUTOMOBILE-BODY PRESS-FORMED COMPONENT AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2018/034104
Kind Code:
A1
Abstract:
[Problem] To provide a member that exhibits high load resistance and rigidity when connected to another member. [Solution] A member 1 has a transverse cross- section that includes a top plate 2, top ridgelines 4, vertical walls 3, bottom ridgelines 5, and floor flanges 9. The member 1 has, at at least one end thereof in an extension direction of the top ridgelines 4, a top plate flange 11 connected via a top plate ridgeline 6 and a vertical wall flange 10 connected via a vertical wall ridgeline 7. The vertical wall flange 10 and the floor flanges 9 are continuous with each other. The relation ΣR/ΣL ≤ 0.13 holds true for the member 1, where ΣR is the sum of radii of curvature of corner portions of the vertical walls at ends of the top ridgelines 4 and the bottom ridgelines 5, and ΣL is the sum of widths of the top plate 2 and the vertical walls 3 at an end of the member. The member 1 is manufactured through a first step of manufacturing an intermediate formed article 27 that is provided with at least flange ridgelines 8 by subjecting a blank 26 to press forming and then shrinkage flange forming the flange ridgelines 8, and a second step of subjecting the intermediate formed article 27 to press forming to thereby manufacture the member 1.

Inventors:
ITO, Yasuhiro (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
Application Number:
JP2017/026671
Publication Date:
February 22, 2018
Filing Date:
July 24, 2017
Export Citation:
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Assignee:
NIPPON STEEL & SUMITOMO METAL CORPORATION (6-1 Marunouchi 2-chome, Chiyoda-ku Tokyo, 71, 〒1008071, JP)
International Classes:
B21D53/88; B21D22/26; B62D25/20
Domestic Patent References:
WO2015133531A12015-09-11
Foreign References:
JPS5215531Y11977-04-08
JP2010173473A2010-08-12
JP2015081036A2015-04-27
Attorney, Agent or Firm:
KAMEYA, Yoshiaki et al. (HAZUKI INTERNATIONAL YOTSUYA, Daiichi Tomizawa Building 3-1-3, Yotsuya, Shinjuku-k, Tokyo 04, 〒1600004, JP)
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