Patent ID: 8033155

Claim:
A press die set for forming a flange that bends an edge of a panel at a right angle in a press-forming direction and an edge adjacent to the right angle edge at a negative angle, comprising: an upper die having a fixed die used for right-angle bending and a slide cam used for negative-angle bending; and a lower die having a fixed punch associated with said fixed die, a fixed punch associated with said slide cam and a driver cam for guiding the slide cam, wherein a bending blade of said slide cam has a right-angle bending forming portion provided at the bottom of the bending blade, and a negative-angle bending forming portion immediately following the right-angle bending forming portion and including a slanted surface positioned at the top of the bending blade; and a panel lifter that abuts against an end face of a negative-angle flange to release the panel from the lower die; wherein the panel lifter has a plurality of ejectors that abut against the end face of the negative-angle flange of the panel, a coupling board to which the ejectors are integrally attached, a plurality of pressing means that operate within a predetermined range in a releasing direction in which said negative-angle flange is released from the lower die and urge the coupling board in the releasing direction, and a cam follower that abuts against the slide cam to maintain said coupling board in a predetermined position when said negative-angle flange is being worked.