Patent ID: 6014883
Filing Date: 2000-01-18
Classification: B21D

Abstract:
In combination, a metal sheet and an apparatus for forming a cup-shaped member from said metal sheet in a press having at least one ram and a base, said apparatus including:a draw pad and a draw horn carried by the ram and a blank and draw die carried by the base in opposed relationship to the draw pad and draw horn, said draw pad and die having opposed clamping surfaces for releasably clamping a disk blank therebetween;a cutting edge carried by the ram and surrounding the draw horn for cutting the disk blank from the metal sheet; andthe draw pad clamping surface having an outer rib extending therefrom toward the clamping surface of the blank and draw die for releasably engaging an outer periphery of the disk blank and for subsequently engaging the clamping surface of said die to maintain a predetermined spacing between the clamping surfaces of the die and draw pad as the draw horn advances into the die to form the cup-shaped member from the disk blank, said rib having a height of between 50% and 95% of the thickness of the disk blank.