A manufacturing method and a manufacture device of a structure member for cars provided with a press-forming article and this, and its press-forming article

Japanese Patent JP6269820

B2

A bulkhead (10), which is a press-formed product, includes a top plate part (11), side flange parts (14) and corner flange parts (15). The side flange parts (14) each extend from respective sides (12) of the top plate part (11). The corner flange parts (15) each extend from respective corner parts (13) of the top plate part (11). The corner flange part (15) connects the side flange parts (14) to each other. In the corner flange part (15), a part having a minimum value of plate thickness is present in a central portion in a circumferential direction, and parts having a maximum value of the plate thickness are present on both sides thereof. A ratio of the maximum value and the minimum value is in a range of more than 1.0 to 1.6 or less. In the press-formed product, wrinkles are suppressed in the corner flange parts, and the press-formed product is suitable for a reinforcing member for an automobile structural member.

JPH05138271	MANUFACTURE OF CRANK SHAFT FOR BICYCLE
JPH07100200	INDUSTRIAL APPLICABILITY: A method for forming a tubular workpiece with a flange.
WO/2019/203889	TOOLING FOR ASSEMBLY A MAGNET TO A RETAINER

Yasuhiro Ito
Yoshiaki Nakazawa

JP2016512582A

January 31, 2018

March 20, 2015

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Nippon Steel & Sumitomo Metal Corporation

B21D19/08; B21D19/00; B21D53/88

JP8090076A
JP2009045649A
JP2000343141A
JP2011245502A
JP2554768B2
JP7112219A
JP2560416B2
JP4118118A

EP0916429A1

Ascend Patent Business Corporation

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