PROCESS OF MANUFACTURE OF DEEP CYLINDRICAL ARTICLES FROM POLYHEDRON BILLETS Russian patent published in 1999 - IPC

Abstract RU 2135319 C1

FIELD: plastic metal working. SUBSTANCE: billet in the form of polyhedron with bases having shape of regular polyhedrons is cut away. Semi-finished product is produced from billet with use of combined stretching which later is subjected to direct pressing-out. Punch with ledge between stages having width equal to thickness of semi-finished product produced by combined stretching is used for stretching and direct pressing-out. EFFECT: improved capability to increase depth of produced cylindrical articles. 2 dwg

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RU 2 135 319 C1

Authors

Nikiforov Ju.B.

Dates

1999-08-27Published

1997-10-08Filed