Method of making an electromagnetic coupling disc

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

1991-06-27

1992-06-30

Crane, Daniel C.

Metal deforming

With cutting

By shearing tool-couple

72340, 296021, 291636, B21D 5300, B21D 2832

Patent

active

051252554

ABSTRACT:
A coupling disc (i.e., the armature or rotor) of an electromagnetic coupling is made by using a punch and die to emboss a plurality of radially spaced rows of angularly spaced grooves in the non-working face of the disc and to cause a plurality of radially spaced rows of angularly spaced projections to be displaced from the working face of the disc. The working face then is machined to remove the projections and, as an incident thereto, circumferentially continuous grooves are formed in the working face in radial alignment with the grooves in the non-working face in order to leave thin webs which establish magnetic flux barriers. To establish even better flux barriers, angularly spaced slots of narrow radial width may be formed through the disc by piercing the disc from the working face thereof and breaking through the thin webs located between the sets of grooves.

REFERENCES:
patent: 2669769 (1954-02-01), Peterson
patent: 3566513 (1971-03-01), Fuller
patent: 4818840 (1989-04-01), Booth
patent: 4951797 (1990-08-01), Booth

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