| 摘要 |
PROBLEM TO BE SOLVED: To provide a press molding method and a device for reducing a three-dimensional spring back such as a twist, bending and also port opening, without changing a product shape.SOLUTION: A press molding method on the present invention comprises a first molding process of molding an intermediate shape of becoming shorter than the line length of a flange part of a product shape in the line length in the longitudinal direction to the flange part for receiving contraction flange deformation and longer than the line length of the flange part of the product shape in the line length in the longitudinal direction to the flange part for receiving elongation flange deformation, by having a groove-shaped part 19 narrower in a groove bottom width than a groove-shaped part 19 of the product shape, by sandwiching a blank 15 by a projection punch 9 and a die 3, by projecting the projection punch 9 from a groove bottom molding part 3a of a punch 5 and a second molding process of molding the intermediate shape in the product shape by the punch 5, a flange molding die 7 and the die 3, and the first molding process and the second molding process are executed in one-time press-molding. |
