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RU

(11)

2 010 646

(13)

C1

(51)

IPC

(21) (22)

Application

4897914/27, 1990-12-29

(22)

Actual filing date

1990-12-29

(45)

Published

1994-04-15

(72)

Inventor

Basovskij L.E.Ermakov V.N.Maslennikova L.I.

(73)

Holder

Mashinostroitel'Nyj Zavod Im.B.L.Vannikova

METHOD OF MAKING HOLLOW METALLIC PARTS Russian patent published in 1994 - IPC

Abstract RU 2010646 C1

FIELD: sheet metal forming. SUBSTANCE: method comprises steps of blanking polygonal blanks from sheet material, assembling the blanks to a pack, again forming them till achieving a necessary profile by pulling through a working opening of a female die, having lasses, equidistant in a plan view, performing drawing-in operation, annealing and trimming edges. EFFECT: enhanced efficiency. 1 cl

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RU 2 010 646 C1

Authors

Basovskij L.E.

Ermakov V.N.

Maslennikova L.I.

Dates

1994-04-15—Published

1990-12-29—Filed

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