| 摘要 |
PROBLEM TO BE SOLVED: To expand molding limitation in a press molding of a metal plate in the case that it is difficult to draw the blank metal plate to be flow in in from the surroundings, due to the restriction on the function of a product requiring good shape precision (plate thickness precision and flatness precision) in a flange portion or due to the restriction with the product shape competing recessing of a material with an adjoined part in the repeating arrangement of the recessing and projecting, etc. SOLUTION: In a method for press molding a metal plate, with which a punch 1 having the projecting part 1A and a die 2 having the recessing part 2A are used and metal plate 4 is pressed by inserting the projecting part 1A into the recessing part 2A to form a member of shape having the vertical wall, in the case of using c for the clearance between the outer wall surface of the projecting part 1A and the inner wall surface of the recessing part 2A when the vertical wall is formed, and t for the plate thickness of the metal plate 4 before molding, molding is performed so as to have the relation of c<t, further desirably, the relation of 0.3t≤c≤0.9t. COPYRIGHT: (C)2005,JPO&NCIPI
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