FIELD: process engineering.
SUBSTANCE: invention relates to metal forming and can be used in fabricating seamless equal-strength permanent-cross section commutators from sheet blanks. Sheet plate-like blank is used whereon cylindrical shrink flanging is produced as well as unclosed torus-shape constant-section profile. Note here that for producing commutator blank is used with thickness increased by 100%. Shrink flanging is carried out by rotational extrusion using a mandrel and a pay-out roller. Profile is produced by squeezing blank cylindrical part by profiling rollers on split mandrel. Thereafter, commutator edges are subjected to machining.
EFFECT: higher quality.
1 cl, 3 dwg
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