AUTOMOBILE-BODY PRESS-FORMED COMPONENT AND MANUFACTURING METHOD THEREFOR

WIPO Patent Application WO/2018/034104

A1

[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.

JP2008279455	HOLLOW SPACE FORMED PRODUCT
WO/2004/011317	STEERING COLUMN DEVICE
JP2000335335	BUMPER REINFORCEMENT, MANUFACTURE OF BUMPER REINFORCEMENT, AND PRESS DIE

ITO YASUHIRO (JP)

PCT/JP2017/026671

February 22, 2018

July 24, 2017

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NIPPON STEEL & SUMITOMO METAL CORP (JP)

B21D53/88; B21D22/26; B62D25/20

WO2015133531A1

2015-09-11

JPS5215531Y1	1977-04-08
JP2010173473A	2010-08-12
JP2015081036A	2015-04-27

See also references of EP 3501684A4

KAMEYA, Yoshiaki et al. (JP)

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