Patent ID: 7302822
Filing Date: 2007-12-04
Classification: B21D

Abstract:
1. An apparatus for forming a shell having a central panel and a chuck wall, the apparatus comprising: a punch core; an inner pressure sleeve located proximate to the punch core and radially outward from the punch core; an outer pressure sleeve located proximate to the inner pressure sleeve and radially outward from the inner pressure sleeve; a punch shell located proximate to the outer pressure sleeve and radially outward from the outer pressure sleeve; a die core located in opposed relation to the punch core; a die core ring located proximate to the die core and radially outward from the die core in opposed relation to the inner pressure sleeve and the outer pressure sleeve; a pressure pad located proximate to the die core ring and radially outward from the die core ring in opposed relation to the punch shell; a blank cutedge located proximate to the pressure pad and radially outward from the pressure pad; and a biasing member coupled to the inner pressure sleeve, wherein the biasing member is structured to selectively bias and control movement of the inner pressure sleeve.