Method and progressive die assembly with separate blanking and stacking for the manufacture of laminated parts
AssigneeL. H. Carbide Corporation
InventorThomas R. Neuenschwander
Life of this patent
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Abstract
Elongated thin strip stock is blanked to form interlocking laminas for electric motor or generator rotors or stators at successive blanking stations. The laminas are blanked at one station and pushed back into the strip stock to be carried to a final station where the laminas are stacked and pressed into interlocking relationship. The laminas are rotated relative to one another to compensate for thickness variations.
Claims28
A progressive die assembly for manufacturing electromagnetic cores from sheet stock material, said progressive die assembly comprising:
- a punching station including means for blanking laminas out of a generally planar sheet of stock material, said punching station further including means for returning the laminas to the plane generally defined by the sheet stock material;
- and
- a stacking station separate from said punching station, said stacking station including holding means for frictionally holding a first lamina and inserting means for inserting a second lamina into said holding means, said inserting means also interlocking the second lamina with said first lamina.
A method of manufacturing laminas from sheet stock material to produce electromagnetic cores using a progressive die assembly having a device for holding the laminas, said method comprising the steps of:
- blanking the lamina by punching the lamina out of the plane generally defined by said sheet stock material, and returning the lamina to the plane generally defined by said sheet stock material;
- inserting the lamina into an interference fit with a holding device;
- blanking a second lamina out of the sheet stock material, and returning the second lamina to the sheet stock material;
- and
- inserting the second lamina into the holding device and interlocking the first and second laminas.
A progressive die assembly for manufacturing electromagnetic cores from sheet stock material, said progressive die assembly comprising:
- a lancing station including means for forming interlock tabs in the laminas;
- a punching station including means for blanking laminas out of a generally planar sheet of stock material, said punching station further including means for returning the laminas to the plane generally defined by the sheet stock material;
- and
- a stacking station separate from said punching station, said stacking station including holding means for frictionally holding a first lamina and inserting means for inserting a second lamina into said holding means and thereby interlock said interlock tabs of said second lamina with said interlock tabs of said first lamina.
Dependencies are inferred from the claim text.