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1. (WO2018180712) PRESS MOLD DEVICE AND PRODUCTION METHOD FOR PRESS-MOLDED ARTICLES

Pub. No.:    WO/2018/180712    International Application No.:    PCT/JP2018/010829
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Tue Mar 20 00:59:59 CET 2018
IPC: B21D 5/01
B21D 22/20
B21D 22/26
B21D 24/00
B21D 24/02
B21D 37/08
Applicants: JFE STEEL CORPORATION
JFEスチール株式会社
Inventors: MIYAKE Hiroto
三宅 弘人
SHINMIYA Toyohisa
新宮 豊久
Title: PRESS MOLD DEVICE AND PRODUCTION METHOD FOR PRESS-MOLDED ARTICLES
Abstract:
In order to reduce warping of a vertical wall section, without buckling, that occurs in component shapes not having a flange section, the present invention comprises: a punch and a pad that sandwich a top plate therebetween in the plate thickness direction; a bending blade for bend-molding a vertical wall; and a stopper that faces the bending blade in the press direction and constrains the end section of the material to be machined. The punch is supported by a first cushion component capable of elastically expanding and contracting in the press direction. The bending blade has: an upper mold component and a lower mold component that are arranged facing in the press direction and having an interval (D) therebetween equal to at least a set compression value; and a second cushion component interposed between the upper mold component and the lower mold component, maintaining the interval (D), and capable of contracting in the press direction at at least a prescribed pressure. The cushion pressure of the second cushion component is smaller than the cushion pressure of the first cushion component and has sufficient cushion pressure so as to not contract during bend-molding of the vertical wall section.