초록 ▼

A method and apparatus for very accurately aligning a stack of loose laminations in the manufacture of a stator core for an electric motor or other dynamoelectric machine. The stack of loose laminations is supported on a pallet having a very accurately machined upper surface which is perpendicular t

A method and apparatus for very accurately aligning a stack of loose laminations in the manufacture of a stator core for an electric motor or other dynamoelectric machine. The stack of loose laminations is supported on a pallet having a very accurately machined upper surface which is perpendicular to the desired centerline of the rotor accommodating bore. The pallet and lamination stack are moved into the alignment station and the pallet is accurately centered and the reference surface oriented perpendicular to the centerline by means of a tapered pin which acts against a tapered surface on the underneath side of the pallet. An arbor is inserted through the rotor accommodating bore of the stack, and engages a spherical head of the pin lying within the reference plane defined by the reference surface of the pallet, and the opposite end of the arbor is located by means of a second pin so that it is perpendicular to the reference plane. The mounting bolts are then threaded into the pallet, the upper pin releases the top of the arbor so that it is free to rotate about the spherical head of the lower pin, and any misalignment of the bore is measured by sensing the displacement of the upper portion of the arbor.

대표청구항 ▼

A method of aligning laminations in a stator core wherein each lamination has an opening therein comprising the steps: providing a carrier having at least one reference surface defining a reference plane; arranging the laminations in a stacked relation with one end of the lamination stack supported

A method of aligning laminations in a stator core wherein each lamination has an opening therein comprising the steps: providing a carrier having at least one reference surface defining a reference plane; arranging the laminations in a stacked relation with one end of the lamination stack supported on the carrier reference surface such that the openings are aligned to form a rotor accommodating bore; inserting an arbor into the bore; anchoring the arbor at a first location on the arbor near the end of the stack that is supported on the carrier reference surface; anchoring the arbor at a second location on the arbor beyond the end of the stack opposite the end supported on the carrier reference surface, the arbor being perpendicular to the reference plane and having a very close clearance with the rotor accommodating bore of the stack to thereby orient the bore perpendicularly to the reference plane, the anchoring of the arbor at the second location being independent of the anchoring of the arbor at the first location; compressing the laminations together and securing the laminations to the carrier reference surface while the arbor is anchored perpendicularly to the reference plane.