| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve integral press forming capable of forming a single plate of a high strength steel plate to a bent member in which a material is bent-deformed without almost deformation of each drawing, expansion, and stretch flange, capable of easily obtaining a member having high member strength and a complicated bent shape and capable of expecting high weight-reduction effect since the flat-face developed figure of the solid figure of the bent member as a forming target is reflected in a contour shape of a blank. <P>SOLUTION: A method is directed for forming a blank 1 composed of a metal single plate into a bent member 30 of a three-dimensional shape where second wall parts 3 are continuous with both sides of a first wall part 2 forming an inner circumferential side of a bend in a longitudinal direction. The method includes a bending step for carrying out bend processing to the blank in such a way that the bent member 30 has at the place of a bent part in the longitudinal direction a crest part 4 with a specified width allowing the width direction of the first wall part to be a crest longitudinal direction and a valley part 5 with a gradual changing width continuous with both the ends of the crest part with the specified width and allowing the width direction of the second wall part to be a valley longitudinal direction. <P>COPYRIGHT: (C)2011,JPO&INPIT |
