FIELD: plastic metal working, namely processes of die forging, possibly for manufacturing stepped hollow shafts.
SUBSTANCE: method comprises steps of calibrating blank prepared by chopping; forming in blank upper and lower cavities, bottom portion with cylindrical near-bottom part and local outer bulged zone. Upper cavity is formed at first pressing out stage. At second stage of pressing out lower cavity, bottom portion and local outer bulged zone are formed simultaneously while blank is centered by punch along it upper cavity and in die along cylindrical near-bottom part.
EFFECT: enlarged manufacturing possibilities of method.
6 dwg
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