Method for manufacturing a frame for an electric motor

Details Method for manufacturing a frame for an electric motor Method for manufacturing a frame for an electric motor

1985-06-04

1987-02-17

Ramsey, Kenneth J.

Metal fusion bonding

Process

With shaping

228232, 29596, B21D 3900

Patent

active

046433465

ABSTRACT:
A method for manufacturing a frame for an electric motor including a frame main body and a metallic member welded to the outer surface of the frame main body is disclosed. After metallic members such as cooling fins are attached to the outer surface of a hollow cylindrical frame main body by projection welding which results in distortion of the frame main body due to radial expansion, sizing is applied to the inner surface of the frame main body by applying a radially outward force from inside of the frame main body to remove the distortion and expand the frame main body so that the inner surface of the frame main body defines a true circle.

REFERENCES:
patent: 2716276 (1955-08-01), Brown
patent: 3129496 (1964-04-01), Cox
patent: 3920174 (1975-11-01), Lamborn
patent: 3986644 (1976-10-01), Hart et al.
patent: 4244098 (1981-01-01), Barcus

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