Method of manufacturing metallic wire segment

Details Method of manufacturing metallic wire segment Method of manufacturing metallic wire segment

2005-01-18

2005-01-18

Tugbang, A. Dexter (Department: 3729)

Metal working

Method of mechanical manufacture

Electrical device making

C029S868000, C029S598000, C029S03300H, C140S105000

Reexamination Certificate

active

06842977

ABSTRACT:
One end of a metallic wire having a rectangular cross-section is widened by upsetting the end of the wire in its axial direction. At the same time, a swollen portion is formed at a position where the widened end portion is to be bent from a straight portion of the wire. Then, the widened end portion is bent at the bending position having the swollen portion. Thus, a metallic wire segment having the widened end portion bent at the bending position is manufactured without wasting any part of wire material, while avoiding formation of cracks on the outer surface of the bending position. Plural wire segments thus manufactured are combined to form a rotor winding of a rotational electric machine, forming a commutator surface by the widened end portions at the same time.

REFERENCES:
patent: 1742190 (1930-01-01), Apple
patent: 2165612 (1986-04-01), None
patent: 55-54234 (1980-04-01), None
patent: A 8-140324 (1996-05-01), None

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