Method of making rotor and stator pole assemblies by stamping ma

Details Method of making rotor and stator pole assemblies by stamping ma Method of making rotor and stator pole assemblies by stamping ma

1990-08-20

1991-04-09

Gorski, Joseph M.

Metal working

Method of mechanical manufacture

Electrical device making

29415, 29598, 29904, 29DIG37, 72327, 310 42, H02K 1502, B21D 3102

Patent

active

050052810

ABSTRACT:
Complementary laminations for a stator pole assembly and a cooperating rotor pole assembly of an electric motor or generator are produced simultaneously from a plate of magnetic material. The plate is stamped to produce an outer peripheral edge corresponding in shape to the exterior of an annular stator yoke and to produce a central aperture shaped to be received by an indexing element of an indexing table. The plate is then repeatedly indexed about its center in equal angular increments and a punch is displaced in a reciprocating rectilinear fashion synchronized with the indexing to punch a multiplicity of identical apertures equally-spaced circumferentially. The apertures are shaped to define internal edge surfaces in the plate corresponding in shape to radially inner surface of the stator yoke and to radially outer surfaces of a central hub of the rotor pole assembly and to define a multiplicity of identical radial webs. The multiplicity of webs is cut with a circular punch such that the plate is divided into a stator pole assembly lamination with radially-inward projections corresponding in shape to stator poles and a rotor pole assembly lamination with radially-outward projections corresponding in shape to rotor poles.

REFERENCES:
patent: 3610979 (1971-10-01), Thomas
patent: 4728842 (1988-03-01), Martin
patent: 4801832 (1989-01-01), Neumann
patent: 4818905 (1989-04-01), Lender

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