Method and apparatus for stacking rotor blanks on a shaft
AssigneeInternational Business Machines Corporation
InventorsPeter H. Bruhn, Rolf Wustrau
Life of this patent
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Abstract
A method of, and an apparatus for, constructing a laminated rotor for use in high speed stepping motors or the like. The apparatus consists of a rotatable carousel having a plurality of rotatable work stations each of which is carried to a plurality of operating stations. Lamina are punched from sheet metal stock and brought back into the stock and held in a friction fit. Sheet stock is then advanced to a stacking station where a lamina is forced onto a rotor shaft. The shaft is rotated thereafter in order to uniformly distribute any local metalurgical or planarity inconsistencies in the sheet stock throughout the laminated structure.
Claims8
A method of manufacturing a uniform stepper motor rotor of a predetermined stack height from laminae with apparatus including a lamina punch for punching laminae from sheet stock strip, a rotatable carousel having a plurality of rotatable work stations each carrying a rotor shaft, and a work station punch, said method comprising:
- (a) punching a lamina from said stock strip with said lamina punch and returning said lamina to said stock strip;
- (b) advancing said stock strip to one of said work stations;
- (c) punching said previously punched lamina from said stock strip and forcing said lamina onto said shaft;
- (d) rotating said shaft for each lamina forced onto said shaft;
- (e) repeating steps a through d until said predetermined stack height is achieved;
- and
- (f) rotating said carousel upon completion of said rotor stack.
In combination, apparatus for assembling on a shaft a laminated rotor comprising laminae fabricated from sheet stock including:
- a progressive die for forming interlockable laminae from and returning said laminae to said sheet stock;
- a blanking/stacking location at which is provided apparatus for punching from the sheet stock each lamina and stacking it on said shaft;
- a clip assembly location at which is provided apparatus for applying a clip for temporarily holding a stack in stable alignment;
- and
- a removal location where a completed rotor is removed and a new shaft provided.
Dependencies are inferred from the claim text.