Method for manufacturing a rotor frame of an electromagnetic clu

Details Method for manufacturing a rotor frame of an electromagnetic clu Method for manufacturing a rotor frame of an electromagnetic clu

1989-02-27

1990-02-13

Crane, Daniel C.

Metal deforming

With cutting

By shearing tool-couple

72339, 72340, 72379, 29894, B21D 2832, B21D 5326

Patent

active

048995690

ABSTRACT:
A method for manufacturing a rotor frame of an electromagnetic clutch is disclosed. A rotor frame is manufactured using press machines in a sequential process of: (1) forming a blank which has the shape of a regular polygon; (2) forming a bulge in one side of the blank; (3) making a hole in the center of the bulge; and (4) bending the walls of the bulge and the blank edges into projections that can be machined to provide appropriately shaped end surfaces for use as a rotor frame.

REFERENCES:
patent: 736551 (1903-08-01), Roemer
patent: 866021 (1907-09-01), Hansen
patent: 1486365 (1924-03-01), Cummings
patent: 3399560 (1968-09-01), Connolly et al.
patent: 4314472 (1982-02-01), Saegusa et al.
patent: 4552005 (1985-11-01), Matsushita
patent: 4553690 (1985-11-01), Nakamura
patent: 4564137 (1986-01-01), Nakamura
patent: 4669295 (1987-06-01), Koitabashi

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