During the stretch stamping process, the punch presses the sheet metal blank into the die cavity to form a contoured part. A part is called stretch if its depth is at least half its diameter. Otherwise, it is simply called universal stamping. Close-up of unwrinkled sheet metal Draw stamping is a widely used process that produces a range of hardware parts, and the deep drawing process may have one or more drawing operations, depending on the complexity of the part. Creping and stretching stamping process One of the main defects that occurs in deep drawing operations is wrinkling of sheet metal material, usually in the walls or flanges of the…

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