MANUFACTURING METHOD FOR MOLDED COMPONENT WITH STRETCH FLANGE

Japanese Patent JP2017042826

A

PROBLEM TO BE SOLVED: To manufacture a molded component with a stretch flange which is manufactured together with molding of the stretch flange, at a low molding load while suppressing split of the stretch flange.SOLUTION: The manufacturing method, which manufactures a molded component with a stretch flange which comprises a top plate part 3 having a first concave outer peripheral edge part 3a and a flange part 7 which continues to a vertical wall part 5, bends toward the top plate part 3 and has a second concave outer peripheral edge part 7a, comprises: a first step of press-molding a part 5A of the vertical wall part 5 along the first concave outer peripheral edge part 3a and forming at the same time a bent-shape part 8, which has a ridge line 9 extended along the second concave outer peripheral edge part 7a and bent toward a thickness direction, outside a position becoming flange part 7, by press-molding a blank material with a die and a punch: a second step of fixing the position becoming the top plate part 3 and bending-molding the vertical wall part 5 and the flange part 7; and a third step of trimming an outer site of the flange part 7.SELECTED DRAWING: Figure 1

SHINGU TOYOHISA
SATO KENTARO
YAMAZAKI YUJI

JP2016164823A

March 02, 2017

August 25, 2016

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JFE STEEL CORP

B21D22/26; B21D19/00; B21D19/08

JPH0576951A	1993-03-30
JPS58205618A	1983-11-30

WO2014104047A1

2014-07-03

Tetsuya Mori
Hide Tanaka Tetsu
Ichi Hirose
Toru Miyasaka

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