Method of making an electromagnetic coupling disc

Details Method of making an electromagnetic coupling disc Method of making an electromagnetic coupling disc

1988-10-27

1990-01-02

Kastler, Scott

Metal treatment

Compositions

Heat treating

148903, 29607, 21912171, H01F 4102

Patent

active

048910775

ABSTRACT:
A method of forming slots in the metal coupling disc (e.g., the armature or rotor) of an electomagnetic coupling such as a clutch or brake. The method is carried out by effecting relative movement between the coupling disc and a laser beam to cause the beam to melt portions of the disc and thereby form slots through the disc. The laser beam is defocused relative to the disc in order to enable a relatively low powered laser beam to form relatively wide slots in the disc. A pressurized jet of gas is directed against the disc immediately adjacent the beam and acts to blast metal from the slots and assist in the formation of wide slots.

REFERENCES:
patent: 3965328 (1976-06-01), Locke
patent: 4685202 (1987-08-01), Booth et al.

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