Method and apparatus for press forming external panel of automobile

摘要

Problem to be solved: to provide a press forming method and a press forming apparatus for an automobile external plate panel for preventing a line shift and forming a character line.Press forming method for external panel of automobile according to the present inventionPunch 3, die 5 and blank holderMetal plate 51Press formed on the external panel 61 for the automobile having the character line 63 and the panel faces 65A and 65B;On the die side forming surface 5B forming the panel faceAn elastic body 9 projecting to the punch 3 side is provided.The elastic body 9 is brought into contact with the metal plate 51 prior to the die 5, andPress forming the elastic body 9 to press the metal plate 51 while pressing the metal plateEquipped withThe frictional force between the crushed elastic body 9 and the metal plate 51 isTo be equal to or greater than the absolute value of the tension difference occurring on both sides of the portion 53 corresponding to the character lineThe elastic body 9 is projected from the die side forming surface 5B.Diagram