SU940895A1 - Multilayer shell production method - Google Patents

Description

Between the turns of the interstitial material in the molten state, the threadlike elements are pressed into the body of the strip.

Before inserting the threadlike elements into the body of the band, the strip is heated to a temperature within the temperature range of the hot treatment.

FIG. 1 shows a scheme for implementing a method for producing multi-layer shells; in fig. 2 shows a longitudinal multi-layer wall of a rolled-out shell with a spiral band of wire strands between adjacent turns.

The technological scheme for the manufacture of multi-layer liners contains uncoilers, feed rollers, an erector, a machine for winding multi-layer blocks, etc. (some devices and mechanisms are not shown in the drawings).

By the proposed method, the multi-layer shell is made with a diameter of 1420 mm and a multi-layer wall thickness of 24 mm.

Shell roll of high-strength steel strip 1,2xGNMF thick

3mm (4 layers of 3 mm). In this case, between the turns of the steel strip, filaments of round wire with a diameter of 2 mm from steel 12XGHMF are fed and water is introduced into the intermediate material in the molten state from steel 12XHMHF melt with the formation of an intermediate layer with thickness

4 mm (3 layers of 4 mm).

Before rolling the shell to the steel strip with one butt weld on its entire width, wedge-shaped inserts made of 12XGMF steel 4 thick (equal to the thickness of the intermediate layer) and UON 13/55 wire with a diameter of 3 mm at a current of 150 ISO.

On the surfaces of the steel strip and wire, anti-adhesion priply compositions in the form of powder, talc, graphite, etc. are applied.

The multi-layered shell is manufactured as follows.

With the uncoiler feeding rollers through the correct device, etc., the strip 1 is fed by the front edge into the winding machine and at a distance from the leading edge of the strip equal to one turn, wedge-shaped inserts and wire 2 are welded to the entire width of the strip The sections of the UONI 13/55 electrodes with a diameter of 3 m-m are three current strengths of 150-180 A.

Then the winding 1 is wound between the rollers 3, 4 and 5 to form the first turn of strip 6, and at the beginning of the pattern. The vanes of the second turn of the strip from the tank 7 are poured molten metal between the surface of the turns of the 6 "turns of the strip and by applying force by rolling rollers

3 to the surface of the coils 6, the metal melt is molded and cooled to form an intermediate layer 8 with a thickness of 4 mm. But at the same time, the melt pouring of the melt on the surface of the coils 6 of the strips and the filaments of the wire 2 is applied by the device 9 with an adhesion composition in the form of powder, talc, etc. equal to half the diameter of the wire filament, i.e. by 1 mm.

The wires of the wire are pressed into the surface in the yokes in the places heated to the temperature between the upper and lower limits of the temperature, the temperature range of the hot pressure treatment of steel 12хГНМФ (850-1200 ° С), at which the steel. it has good ductility and minimal deformation resistance, as well as the formation of cracks, tearing and other defects in the process of plastic deformation. The coils of the 6th strip are heated in

an account of the temperature of the metal melt introduced between their surfaces.

Winding strip 1, pressing wires 2 into the surface of the coils 6 of the strip with their subsequent feeding between the coils and pouring the metal melt

on the surface of the turns and strands of wire

carried out until the thickness

the walls of the shell 10 will not reach the specified

24 mm, i.e. 4 turns of strip along

3 mm and 3 turns of the hardened melt of 4 mm; at the same time, wire strands are wound between the closely adjacent adjacent surfaces.

After that the ends of the strip in the first and

the last turns of the shell 10 are welded to the adjacent layers by longitudinal welding AND seams with UONI 13/55 electrodes with a diameter of 4 Mm with a welding current of 180-200 A.

Continuously applying an adhesive composition to the surface of the turns of the strip and wire, pressing one side of the surface of the wire 1B to the surface of each successive turn of the strip before pouring the melt, pouring the other side of the surface of the wire to form a coil between the surfaces of the layers, and also forming the melt before the formation of intermediate turns of the calculated thickness allows to create a spiral bandage of wires between the adjacent surfaces of the turns. strips and on top, buty | mi coils of hardened melt with a high accuracy of adherence of their surfaces.

This method of bandaging is used only in the manufacture of the shell by spiraling the steel strip with the simultaneous introduction of molten metal between the turns of the strip.

At the ends of the manufactured multi-layer shell block, cooled pressure plates are installed to hold the melt (not shown (shown).

Metals, their alloys, etc., as well as non-metallic materials can serve as melts.

Threadlike elements can be round, triangular and other sections.

This method of manufacturing multilayer shells allows:

to increase the stock of plasticity and deformability in multi-layered shell steak, and consequently, to increase the strength, reliability and quality of the product;

increase the viscosity of the multilayer shell wall during the destruction process, which increases safety during operation of the product;

reduce go exclude the relative movement of adjacent layers when heated in the process of welding the shells between themselves due to the strong engagement of the wound filaments of wire with the surface of adjacent turns;

increase the resistance of the multilayer wall to bending stresses by increasing the stiffness (elasticity) of the multilayer wall by forming a spiral-like band of wire strands that is in strong engagement with the surfaces of adjacent turns of the shell.

The application of this method increases the strength, reliability, quality and safety during the operation of the product.

Claims (2)

1. A method of manufacturing multi-layered shells, in which a metal strip is wound to form a roll the blocking block, between the turns of the strip, the threadlike elements are laid, the intermediate material is introduced in the molten state and the adhesion composition is applied to the surface of the strip and the threadlike elements, which, in order to increase the strength and reliability of the shells, before introducing the intermediate material in the molten state nii between the coils (stripes, threadlike elements press into the body of the strip. 2. A way to pop. .1, characterized in that before pressing the threadlike elements into the body of the strip, it is heated to a temperature within the temperature range interval of hot metal processing strip. Sources of information taken into account in the examination: 1. USSR author's certificate in application number 2683215 / 25-27, cl. B 21 C 47/00, 10.11.78. 2. USSR author's certificate of application number 2936756 / 25-27, cl. B 21 C 47/00, 11.06.80 (prototype). -3 five J