METHOD OF PRODUCING HOLLOW FORGINGS Russian patent published in 2013 - IPC B21D22/20 

Abstract RU 2486025 C1

FIELD: process engineering.

SUBSTANCE: invention relates to stamping and may be used in whatever industry at single- and double-action presses. Hollow part is formed by drawing sheet mould with provision of clearance between die top plate and billet by pressing die top plate working surface to spacer. Note here that said clearance is corrected by varying spacer thickness subject to billet thickness.

EFFECT: ruled out necking and corrugation.

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RU 2 486 025 C1

Authors

Vasil'Ev Konstantin Ivanovich

Spodarenko Mikhail Sergeevich

Okhrimenko Marina Alekseevna

Junina Anna Vjacheslavovna

Gekhtman Dmitrij Alekseevich

Dates

2013-06-27Published

2011-12-14Filed