Patent ID: 7757536

Claim:
A plate-shaped workpiece positioning structure for hot press forming that, upon executing a hot press forming of a heated plate-shaped workpiece, positions the plate-shaped workpiece relative to a pair of press dies approaching to and separating away from each other, the positioning structure comprising: a first positioning opening arranged in a geometrical center part of the plate-shaped workpiece, the first positioning opening engaging with a first positioning pin immovably fixed on one of the pair of press dies integrally therewith, to position the plate-shaped workpiece; and a second positioning opening arranged between the first positioning opening and a predetermined outer peripheral part of the plate-shaped workpiece and is formed in an elongate shape that extends along a line connecting the first positioning opening and the predetermined outer peripheral part, the second positioning opening engaging with a second positioning pin immovably fixed on one or other of the pair of press dies integrally therewith, to position the plate-shaped workpiece in a circumferential direction about the first positioning opening, and to allow contractional deformation of the plate-shaped workpiece toward the first positioning opening upon executing the hot press forming.