OGIVAL ENVELOPES MAKING METHOD Russian patent published in 2005 - IPC

Abstract RU 2255827 C1

FIELD: plastic working of metals.

SUBSTANCE: method for making ogival envelope by multi-transition spinning of sheet blank mounted in rotating mandrel at lengthwise motion of spinning tool mounted with gap relative to said mandrel. Gap between spinning tool and mandrel for any point of envelope profile is corrected by value determined according to relation given in claims of invention while taking into account corrections calculated for first envelope.

EFFECT: lowered value of wall thickness difference and mass, enhanced accuracy of geometry of envelope.

1 dwg

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RU 2 255 827 C1

Authors

Bondar' A.V.

Borisov V.N.

Gritsjuk V.G.

Grebenshchikov A.V.

Dates

2005-07-10—Published

2003-11-19—Filed