Metal working – Plural diverse manufacturing apparatus including means for... – Separate tool stations for selective or successive operation...
Patent
1994-06-20
1999-07-06
Hall, Carl E.
Metal working
Plural diverse manufacturing apparatus including means for...
Separate tool stations for selective or successive operation...
29596, 29598, 29736, H02K 1502
Patent
active
059183594
ABSTRACT:
A process and apparatus for manufacturing lamina stacks used to form rotor or stator cores for electric motors. In the process of forming a plurality of blanked lamina, a blanking and tacking machine forms dimples in the laminas prior to coaxially stacking the laminas. The lamina may also include interlocking portions so that the lamina stack may be interlocked. The dimples are located at offset positions relative to adjacent laminas to cause the laminas of the stack to be spaced apart. The spaced apart stack may be subject to annealing which relieves metal stress in the stack and causes the formation of a desired non-conductive layer on the surfaces of the laminas. The annealed lamina stack may then be compressed to bring the laminas into abutting relation to be subsequently manufactured into rotor or stator cores.
REFERENCES:
patent: 3027628 (1962-04-01), Wilk
patent: 3186066 (1965-06-01), Metzger, Jr.
patent: 4438558 (1984-03-01), Mitsui
patent: 4538345 (1985-09-01), Diederichs
patent: 4619028 (1986-10-01), Neuenschwander
patent: 5338996 (1994-08-01), Yamamoto
Hall Carl E.
L.H. Carbide Corporation
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