METHOD FOR FORGING HOLLOW PARTS Russian patent published in 2000 - IPC

Abstract RU 2157287 C2

FIELD: plastic metal working, namely processes for making large-size hollow large-height parts. SUBSTANCE: method for making large-size hollow parts from flat sheet blanks whose percentage thickness is more than 0.0080 comprises steps of preliminarily drawing blank, annealing and drawing it. At step of preliminary drawing, flat sheet blank is shaped (by means of cone holder) to cup with diameter of small base determined according to expression: d=D-(35-40)S, where S - thickness of initial sheet blank, D - diameter of initial sheet blank. EFFECT: increased depth of drawing in one die set. 2 dwg, 1 ex

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RU 2 157 287 C2

Authors

Popov I.P.

Maslov V.D.

Dates

2000-10-10Published

1997-11-20Filed