METHOD FOR MANUFACTURING STRETCH-FLANGE-FORMED COMPONENT

WIPO Patent Application WO/2017/038579

A1

Provided is a method for manufacturing, with low formation load and minimized stretch flange cracking, a stretch-flange-formed component manufactured in accompaniment with stretch-flange formation. A method for manufacturing a stretch-flange-formed component provided with: a top plate section (3) having a first concave external peripheral edge section (3a); and a flange section (7) that curves to the top plate section (3) side in continuous fashion to a vertical wall section (5) and that has a second concave external peripheral edge section (7a). The method comprises: a first step for forming a curved-shaped section (8) curved in the plate thickness direction and in which a ridge line (9) extends along the second concave external peripheral edge section (7a) to the outer side of the position of the flange section (7) with respect to a blank material; following the first step, a second step for securing the position of the top plate section (3), and bending and forming the vertical wall section (5) and the flange section (7); and a third step for trimming the outer side locations of the flange section (7).

JPH10314856	METHOD AND DEVICE FOR COMPOSITE WORKING TO WHICH LINK CAM IS APPLIED
JP2002219527	PRESS MOLD AND MOLD RELEASING METHOD FOR MINUS ANGLE PORTION

SHINMIYA TOYOHISA (JP)
SATO KENTARO (JP)
KISHIGAMI YASUHIRO (JP)
YAMASAKI YUJI (JP)

PCT/JP2016/074657

March 09, 2017

August 24, 2016

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JFE STEEL CORP (JP)

B21D19/08; B21D19/00; B21D22/26

JP2013169578A	2013-09-02
JP2002282952A	2002-10-02
JP2012245536A	2012-12-13

MORI Tetsuya et al. (JP)

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