Method for making squirrel-cage motor

Details Method for making squirrel-cage motor Method for making squirrel-cage motor

1996-01-24

1999-08-17

Hall, Carl E.

Metal working

Method of mechanical manufacture

Electrical device making

164109, 310211, H02K 1502

Patent

active

059375086

ABSTRACT:
A method of making a squirrel-cage rotor employs a forging die assembly including a receiving die receiving one end of a rotor core and having a first annular concavity corresponding to one of two end rings and a pressing die movable relative to the other end of the rotor core to form a second annular concavity corresponding to the other end ring. The one end of the rotor core is set in the receiving die, and a forging material such as aluminum is set at the other end of the rotor core. Subsequently, the pressing die is moved relative to the other end of the rotor core so that the forging material is pressurized to be plastically deformed. The forging material is caused to enter the first concavity through slots of the rotor core. Consequently, the first and second concavities and the slots of the rotor core are filled by the forging material such that a squirrel-cage conductor is formed.

REFERENCES:
patent: 2248167 (1941-07-01), Elsey
patent: 3665593 (1972-05-01), Savage
patent: 3683493 (1972-08-01), Begovich

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