Method of producing a frame body for an electric motor

Details Method of producing a frame body for an electric motor Method of producing a frame body for an electric motor

1986-10-27

1988-11-15

Ramsey, Kenneth J.

Metal fusion bonding

Process

With shaping

228179, B21D 3900, B23K 3106

Patent

active

047843128

ABSTRACT:
A method of producing a frame body for an electric motor comprises a step of bending a flat plate having a given size into a generally round body, a step of pressing the generally round body in the radial direction by a metal mold having a given inner diameter, a step of welding edge surface portions opposing each other of the generally round body to form a cylindrical frame body, a step of attaching heat radiation fins on the outer circumferential surface of the frame body by welding, and a step of pressing the inner circumferential surface of the frame body in the radial direction so that the frame body has a predetermined inner diameter.

REFERENCES:
patent: 330338 (1885-11-01), Lippincott
patent: 1120209 (1914-12-01), Lloyd
patent: 4148426 (1979-04-01), Midzutani et al.
patent: 4643346 (1987-02-01), Gotoh

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