| 摘要 |
Provided is a press molding method by which it is possible to further mitigate cracks and wrinkles when forming a part into a part shape (1) having a C-shaped or hat-shaped cross-section and a bent portion in the lengthwise direction. In the press molding method, a metal plate (6) is molded into the part shape (1) having a C-shaped or hat-shaped cross-section with at least a top surface portion (1A) and side wall portions (1B) continuous with the left and right side thereof, and having one or more bent portions (2a, 2b) bent in the lengthwise direction, which intersects with the cross-section. The press molding method of the present invention includes: a first step for applying an in-plane shearing deformation according to the direction of the bend on a plate portion on one or both sides of the bent portions (2a, 2b) in the lengthwise direction of the metal plate (6); and a second step for press molding the plate material on which the in-plane shearing deformation has been applied so as to be in the part shape (1). |
