| 摘要 |
PROBLEM TO BE SOLVED: To provide a press forming die capable of suppressing generation of poor forming in the vicinity of a joined part, reducing adjustment work for a die in a tryout, and improving the quality of mass-produced products. SOLUTION: A panel 20 of an assembled blank material 10 is formed with a press forming die. The press forming die is provided with drawing beads for controlling the inflow of a blank material into a drawing part at the time of press forming. The drawing beads have a first drawing bead (corresponding to a first bead 15), which is conventional, and a second drawing bead (corresponding to a second bead 16), which is arranged in the direction crossing the first drawing bead. The second drawing bead extends from the first drawing bead to the outside of a drawing part (corresponding to a product surface 21). The second drawing bead inhibits the strain, which causes distortions (wrinkles) on a flange part 23 of a thick plate part 11 at the time of flange shrink forming, from propagating to a thin plate part 12, so that turning of the thick plate part 11 is suppressed. COPYRIGHT: (C)2009,JPO&INPIT
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