A manufacturing method of a press-forming article and a press-forming article, and a manufacture device of a press-forming article - Nippon Steel & Sumitomo Metal Corporation

Title:

A manufacturing method of a press-forming article and a press-forming article, and a manufacture device of a press-forming article

Document Type and Number:

Japanese Patent JP6090464

Kind Code:

B2

Abstract:

[Object] To provide a press-molded product including an inward continuous flange and capable of improving performance involved with the bonding strength between a reinforcing member and the other member or the rigidity of a vehicle body without forming a notch in a ridge-portion flange so as to prevent a defect generated during a press-molding process. [Solution] Provided is a press-molded product of a metal plate which is formed by a steel plate having a tensile strength of 340 MPa or more and includes a ridge portion extending in a predetermined direction and first and second surface portions respectively extending from both ends of a ridge line formed by the ridge portion, the press-molded product including: an inward continuous flange which is obtained by continuously forming a ridge-portion flange formed inward in an end portion of the ridge portion, a first flange formed inward in at least a part of an area of an end portion of the first surface portion, and a second flange formed inward in at least a part of an area of an end portion of the second surface portion. Regarding a plate thickness of an edge portion of the ridge-portion flange, the ridge-portion flange has a plate thickness distribution in which a plate thickness of a portion of each of areas on both sides of a circumferential center area is equal to or larger than a plate thickness of the center area.

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Inventors:

Yoshiaki Nakazawa
Yasuhiro Ito

Application Number:

JP2015537616A

Publication Date:

March 08, 2017

Filing Date:

August 26, 2014

Export Citation:

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Assignee:

Nippon Steel & Sumitomo Metal Corporation

International Classes:

B21D22/26; B21D5/01; B21D19/00; B21D19/08; B21D22/02; B21D24/00

Domestic Patent References:

JP60131226U
JP2000301250A
JP5338504A

Foreign References:

FR838735A

Attorney, Agent or Firm:

Miaki Kametani
Tetsuo Kanamoto
Koji Hagiwara
Kazuki Matsumoto

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