FIELD: metallurgy and machine building.
SUBSTANCE: invention relates to plastic metal working and it can be used in forge shops of metallurgical and machine-building plants at manufacture of vehicle wheels and like articles. Proposed cup-semifinished part is manufactured I two steps at one pass. Blank is upset at first step. Bottom of cup and its inclined side wall are formed at second step by reverse pressing out. Wall is coupled with bottom in zone of its minimum diametric dimensions. Bottom of cup is formed to provide concave conical surface from outside and inside. Shape of said conical surfaces is determined according to following dependences: α=86°÷76°; β=α-(30'÷5°), where α and β are taper angles of surfaces limiting bottom of cup from outside and inside, respectively.
EFFECT: provision of rational structure of material fibers in semifinished part and improved strength characteristics.
2 ex, 2 dwg
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