SU1323169A1 - Method of moulding shells - Google Patents

Abstract

The invention relates to the field of metal forming and can be used in mechanical engineering in the manufacture of shells with a stepped side surface. The purpose of the invention is to improve the quality by reducing the thinning of the shell wall. The hollow semi-finished product 7 is filled with fluid 6. Punch 4 is applied to the end of semi-finished product 7 and fluid 6, which transmits pressure to the inner surface of semi-finished product 7. After the stress 8 in the wall of shell 8 is reached, the internal pressure of fluid Wednesday 6 is removed, complete the molding only by axial compression of the punch 4. 1 Il. i SP z

Description

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The invention relates to methods for the treatment of metals by pressure and can be used for forming casings.

The purpose of the invention is to increase the cage by reducing the thinning of the shell wall.

The drawing shows a scheme for implementing the method.

In the drawing, the following designations are accepted: 1 — a die holder for implementing the method, 2 — an upper split matrix, 3 — a lower split matrix, 4 — a punch, 5 — a hole in the punch 4, 6 — a fluid, 7 — a hollow semi-finished product, 8 - ready shell.

The prefabricated Polish 7 prefabricated 7 is filled with fluid 6, for example, industrial waste. The punch 4 acts on the end of the semifinished product 7. When the punch is moved, the fluid 6 simultaneously acts on the inner surface of the semifinished product 7. The semifinished product is formed (dispensed) into the working cavities of the matrices 2 and 3. material inside

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Compiled by V. Muslimov Editor L, Pcholinska Tehred I., Popovich

Order 2897/9 Circulation 732

VNSHPI State Committee of the USSR

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab ,, d, 4/5

Production and printing company, Uzhgorod, Proektna st, 4

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The relative pressure of the fluid 6 is removed and the further forming is performed only by axial compression force,

At the end of the molding, the dies 2 and 3 are disassembled and the finished casing is removed from the die.

Due to the fact that there is no pressure from the fluid side at the final stage of forming, the wall wall wall thinning is reduced, which ensures a higher quality of the formed shells.

Claims (1)

Invention Formula The method of forming the shells, in which the sheath is filled with a fluid medium, acts upon the workpiece with axial force and simultaneously creates an internal pressure from the fluid side, characterized in that, in order to improve quality by reducing the wall thinning of the sheath equal to the yield stress of the material being molded, the internal pressure of the fluid is relieved. Proofreader N. King Subscription