MANUFACTURING METHOD AND MANUFACTURING DEVICE FOR PRESS-MOLDED ARTICLE

Title:

MANUFACTURING METHOD AND MANUFACTURING DEVICE FOR PRESS-MOLDED ARTICLE

Document Type and Number:

WIPO Patent Application WO/2016/075937

Kind Code:

A1

Abstract:

A press-molded article of the present invention has a top plate, vertical walls, and ridges between the vertical walls and the top plate, wherein a shape changing part exists in a portion of the ridges. A press-molded article manufacturing method of the present invention comprises: a preparation step in which a metallic plate is prepared as a raw material; and a press processing step in which the raw material is subjected to press processing using a punch, and a pad and a die which each form a pair with the punch. The press processing step includes: a first step for molding, using the punch and the pad, the entirety of the top plate, the entirety of the ridges including the shape changing parts, and regions of the vertical walls spanning from the border between the vertical walls and the ridges to a predetermined height; and a second step, which follows the first step, for molding the remaining regions using the punch and the die in a state in which the raw material is being sandwiched by the punch and the pad.

Inventors:

NISHIMURA RYUICHI (JP)
NAKAZAWA YOSHIAKI (JP)
YONEBAYASHI TORU (JP)
ISHII SEIYA (JP)
SATO KOICHI (JP)

Application Number:

PCT/JP2015/005632

Publication Date:

May 19, 2016

Filing Date:

November 11, 2015

Export Citation:

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Assignee:

NIPPON STEEL & SUMITOMO METAL CORP (JP)

International Classes:

B21D22/26; B21D24/00; B21D5/01

Foreign References:

JPH081243A	1996-01-09
US2339032A	1944-01-11

Other References: