| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a press forming die with which a press-formed article which has high dimensional accuracy and a stretch-flanging part is obtained by sufficiently increasing fold pressure in the last period of the press forming. <P>SOLUTION: The press forming die includes: a punch die having a plate part; a die opposed to the punch die; and a fold pressing die having a first surface which can be brought into contact with the plate parts, a second surface which can be brought into contact with the die and a side surface connecting the first surface and the second surface, the fold pressing die being provided by positioning the side surface with a predetermined spacing between the punch die. The plate part has, on the side opposing to the first surface of the fold pressing die, one or a plurality of fold pressure increasing structures by which reaction force is generated by their contact with the first surface of the fold pressing die while linking with the forming action from a prescribed position before the press forming finishing point to the finishing point of the press forming, the fold pressing die is divided into a plurality fold pressing divided dies from the first surface toward the second surface in the side surface and a part of the plurality of fold pressing divided dies is brought into contact with the fold pressure increasing structures on the first surface. <P>COPYRIGHT: (C)2012,JPO&INPIT |
