PURPOSE: To prevent generation of creases, distortion etc. around the drawn part by providing a member that presses circumference of the drawn part before starting forming in an upper die or lower die for forming of product having local drawn part.
CONSTITUTION: When forming an outer panel, for instance, of a door by a press die, a pressing member 16 is provided in a groove 11d around the projected part 11b of the die allowing vertical movement and projected higher than the projected part 11b by a pressing device such as an elastic body etc. A thin plate material 18 is placed on a holder 14 with the die and blank holder 14 raised. When the die 11 is lowered, the edge of the material 18 is clamped by a clamping part 11c and the holder 14. Then, the die 11 and holder 14 go down and come into contact with the die face 12a of a punch 12 to perform rough forming of the material 18. Then, the member 16 comes into contact with the material 18. By this, circumference of the area where a hollow for attaching a door handle is formed is maintained rigid between the member 16 and the face 12a. Accordingly, generation of creases, distortion etc can be prevented from the start and completion of the projection 11b.
JP56142818B |