To improve the yield of a material by evading an increase in the margin of excess metal when the depth of drawing is deep or the like in drawing.
A projecting-shaped forming part 3 for absorbing the surplus is beforehand provided on a die 1, a range in which a blank material is not restrained is made in the early stage of the forming, the surplus of the blank material is absorbed with the projecting-shaped forming part 3 by inducing the inflow of the blank material to the projecting-shaped forming part 3 and the formed good is cut in a part where a product shape is obtained. Because the margin of the excess metal is reduced, the yield of the material is improved. Because the requirement to the stretch property of the material is moderated, cost reduction is attained by lowering the grade of the material. A die accomplishing period is shortened.
COPYRIGHT: (C)2007,JPO&INPIT
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