FIELD: process engineering.
SUBSTANCE: invention relates to metal forming and may be used for production of cup with flange parts. Initial blank is formed in two steps. At first step, initial blank is subjected to re-extrusion to make cup inner space. Note here that male die is used composed of main and end parts. After first step, composite male die end part is left at cup bottom. At second step, said blank is upset to make the flange at blank top Along with upsetting, blank is expanded by stepped male die acting on blank side surface. Said steeped male die has taper part with cone generatrix inclination angle of 10-15 degrees. After forming at second step, composite male die end part is removed from the part.
EFFECT: parts with enlarged flange.
2 dwg, 1 tbl
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