PURPOSE: To prevent the generation of the wrinkle, by applying the drawing work to the disk type thin metallic sheet so as to make many cavities in the part to be drawn into the bowl shape connecting to the circumferential edge of the disk sheet.

CONSTITUTION: The circumferential edge 1a of the disk type thin metallic sheet 1 is held between the flat planes B1 of the cylindrical pressure pad A and of the lower die B; the protuberant spherical tip of the punch C is slid down in the pressure pad A and collaborates with the concave spherical face B2 of the lower die B in applying the drawing work to the part to be previously perforated as the beard guiding holes 2, 2..., which is then formed into the bowl shape. Hereupon, the disk type metallic sheet 1 receives the tangential compression force, and tends to increase its thickness; however, since the metal equivalent to this increasing thickness is absorbed by deforming into the cavities 3, the generation of the wrinkle can be prevented.