Patent ID: 6237214
Filing Date: 2001-05-29
Classification: B21D,H02K,Y10T

Abstract:
An apparatus for manufacturing an interlocked stack of laminations from a sheet of stock material, the stack of interlocking laminations defining a plurality of circumferentially spaced slots which are disposed at a desired skew angle relative to the stack axis of the interlocked lamination stack, the interlocked stack adapted for manufacturing a rotor for a dynamoelectric machine, said apparatus comprising:a blanking station for blanking laminations from the stock material;a die assembly located at said blanking station, said die assembly including a first punch for forming a generally circular indentation in each said lamination, each said indentation having a central axis coaxial with said stack axis, each said indentation defining a corresponding depression and projection; anda stacking station for receiving said laminations from said blanking station and associating each said lamination with a lamination stack, said stacking station including a rotator automatically rotating said lamination stack relative to each said lamination by an angle sufficient to create a slot in the resulting lamination stack having the desired skew angle, said stacking station also including a second punch interlocking said indentations so that said projections extend into adjacent said depressions to form the desired stack of interlocked laminations.