Patent ID: 9731339
Date: 2017-08-15
CPC Classifications: B21D,B21J

Claim:
1. A production method for a press-molded article, the method comprising producing the press-molded article, which is a final molded body, by performing main processing on an intermediate molded body obtained by performing preprocessing on a blank formed from a high-strength sheet steel, wherein the final molded body has a hat shaped cross-section configured from a top plate section, two vertical walls joined to the top plate section along a longitudinal direction of the top plate section, and two flange portions, one joined to each of the two vertical walls, and has a curved portion curved in a hill shape at a longitudinal direction internal portion as viewed from a side, wherein the intermediate molded body has a hat shaped cross-section configured from an intermediate top plate section formed at the top plate section, two intermediate vertical walls joined to the intermediate top plate section along a longitudinal direction of the intermediate top plate section, and two intermediate flange portions, one joined to each of the two intermediate vertical walls, and, in the intermediate molded body, a height of the two intermediate vertical walls is less than a height of the two vertical walls of the final molded body in a region for forming the curved portion, and, at two remaining regions other than the region for forming the curved portion, the height gradually decreases along the longitudinal direction, as a distance from the region for forming the curved portion increases, to substantially zero at positions furthest from the region for forming the curved portion, and the main processing comprises: