Method of producing yoke of rotary electric machine

Details Method of producing yoke of rotary electric machine Method of producing yoke of rotary electric machine

1980-11-12

1983-06-28

Gilden, Leon

Metal deforming

By use of closed-die and coacting work-forcer

Forcing work into or within closed die; e.g., forging

72354, B21D 2202

Patent

active

043898718

ABSTRACT:
A method of producing a yoke of a rotary electric machine wherein a cylindrical blank is formed comprises extrusion forming a semi-finished article having abutting surfaces at axial opposite ends in the first step. The abutting surfaces are subjected to coining in the second step whereby the two abutting surfaces can have a spacing interval of high accuracy and can be disposed parallel to each other.

REFERENCES:
patent: 3101534 (1963-08-01), Large
patent: 3491576 (1970-01-01), Tomiji et al.
patent: 4253323 (1981-05-01), Marakami

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