Metal working – Method of mechanical manufacture – Electrical device making
Patent
1997-05-06
1998-10-27
Hall, Carl E.
Metal working
Method of mechanical manufacture
Electrical device making
29596, 29598, 29609, 295646, 295647, H02K 1504
Patent
active
058263233
ABSTRACT:
An apparatus and method for manufacturing laminated parts from a plurality of laminas, in which the laminas for forming the laminated parts are blanked from strip stock material. The laminas and are then cut and stacked to form the laminated part. The apparatus includes a measuring device, such as a linear variable differential transducer, for measuring the thickness of successive sections of the strip stock. A controller, such as a computer or a programmable logic controller, receives the thickness value of the strip stock sections from the measuring device. The desired stack height is inputted into the controller, as well as a protuberance or dimple height. A punching device, such as one or more front and rear slide operated punches, is also included which is activated by the controller to provide a protuberance at selected locations upon the strip stock sections. Respective air valves and cylinders may operatively connect to each punch to cause the punch to impart a protuberance upon receipt of an appropriate signal from the controller. The location and number of the protuberances within the stack is determined as a function of the desired stack height, the thickness of the strip stock material and the predetermined protuberance height.
REFERENCES:
patent: 3202851 (1965-08-01), Zimmerle et al.
patent: 4538345 (1985-09-01), Diederichs
patent: 4619028 (1986-10-01), Neuenschwander
patent: 5349741 (1994-09-01), Neuenschwander
Hall Carl E.
Oberg Industries, Inc.
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