Patent ID: 6745458
Filing Date: 2004-06-08
Classification: B21D,H02K,Y10T

Abstract:
A method of manufacturing a stack of laminas in a multistation progressive die assembly, said die assembly having a selectively actuable punch, a staking punch, a blanking punch, and a choke barrel, said method comprising:guiding sheet stock material through the die assembly; stamping a plurality of generally planar laminas from said sheet stock material with said selectively actuated punch, each said laminas including an interlock element, each said laminas having an outer perimeter surface, each said lamina outer perimeter surfaces defining one of a plurality of distinguishable predetermined outer perimeter configurations, a portion of at least one of said outer perimeter surfaces comprising a choke surface for engaging a corresponding aligning surface of the choke barrel; engaging a said interlock element in one of said laminas with said staking punch; guiding and aligning said one lamina by means of said staking punch in said choke barrel; separating said lamina from said sheet stock material; and interlocking said lamina with another lamina located in said choke barrel.