FIELD: electrical engineering. SUBSTANCE: process includes cutting of round blank with lugs uniformly arranged over circumference followed by combined extrusion to thin vertical walls of body and lugs, bending of lugs through 90 deg to extruded cylindrical body; combined extrusion is made by means of punch provided with side slots uniformly arranged over circumference relative to punch axis, their width being equal to width of finished commutator lugs. All-stamped blank obtained has equal-width lugs arranged over circumference relative to blank axis. EFFECT: improved quality of commutator blank. 4 dwg
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