SU1650360A1 - Mechanism for manufacture of multilayer roller stock - Google Patents

Abstract

The invention relates to powder metallurgy, in particular, devices for producing multi-layered steel. The aim of the invention is to increase the adhesion strength of the rental layers. In the lower part 5 of the hopper, powder is poured, U.U of Figure 1 is roller 1. The upper part 4 of the bunker and the gap between the rolls 6 pass the compact tape, set the gap between the tape and the upper point of the lower roll to be equal to or smaller than the size of the powder particles. Compressed gas through line 2 is fed into chamber 3. It sucks powder particles from the bottom of the bunker through channel 7 and carries them into nozzle 8. Exit from the nozzle, powder particles bombard the compact tape near and in the deformation zone. Powder particles that did not participate in the formation of a metal layer were blown out by a compressed gas jet carrying them and dropped into the lower part of the bunker, where they could be brought back into operation. The spent gas stream passes through the section between the upper and lower parts of the bunker. 2 Il. E o ate o o) a o

Description

The invention relates to powder metallurgy, in particular, to devices for producing bimetallic products using powders and granules, and can be used in instrument engineering, mechanical engineering and other industries.

The purpose of the invention is to increase the adhesion strength of the rolled products.

FIG. 1 shows the inventive device for producing multi-layered steel; in fig. 2 shows section A-A in FIG. one.

The device contains a roller 1, a pipeline 2 of compressed gas on which the chamber 3 is mounted, mounted on the rear wall of the upper part 4 of the bunker, the lower part 5 of the bunker, the rolls 6 arranged so that one roll occupies the upper and the other lower position, channel 7, nozzle 8, extending along the horizontal axes of the rolls, located inside the hopper and directed toward the rolls, the axis of the nozzle 8 is located at the level of the gap between the rolls and perpendicular to the plane in which the horizontal axes of the rolls are located.

The device works as follows.

Powder is poured into the bottom 5 of the bunker. Through the roller 1, the upper part 4 of the hopper and the gap between the rollers 6 pass the compact tape, fix its front end on the coiler of the rolling mill (not shown) and open the gas access to the pipeline 2 of compressed gas. Compressed gas, a passage through chamber 3, sucks powder particles from the bottom of the bunker through channel 7, carries them into nozzle 8, where they receive a linear velocity that is many times greater than the linear velocity of the tape. The exit from the nozzle, the powder particles bombard the compact tape near and in the deformation zone between the rollers and wedge in the gap between the lower shaft and the lower surface of the tape. Active bombardment contributes to the additional destruction of the surface layers of the powder particles and compact tape, and the high kinetic energy provides a forced feed of granules to the deformation zone between the rollers, which increases the stress

condition in the marked zone, and this all together favors a more firm mechanical setting of the powder with a compact tape and obtaining at the exit of the rolls

more durable bonding of bimetallic tape layers.

The powder feed is carried out with a slight excess of the consumption rate in order to avoid obtaining an uneven rolled metal layer in case of unexpected deviations from the established modes. Powder particles that were not stuck in the gap between the rollers and did not participate in the formation of a layer of metal were blown off by a stream of compressed gas, carrying them into the lower part of the bunker, from which they could again be put into operation,

The spent gas stream exits through the section between the upper and lower parts.

bunker. However, the bunker can be made without separation into two halves, but it should provide an outlet for the treated compressed gas, for example a window, and also provide for powder retention, for example filters.

The described device in comparison with the known provides for obtaining a more durable bonding of the layers of metals of the bimetal, obtaining a more dense and durable

rolled bimetal layer and provides the rolling process with ultra-high rolling speeds with high density and strength of the rolled layer.

Claims (1)

Claims An apparatus for producing multi-layered rolled products comprising rollers and a roll hopper installed in the rollers compressed gas, characterized in that, in order to increase the adhesion strength of the rolled steel, it is provided with a roller, a slit nozzle and a chamber connected to the bunker and the pipeline and having a channel in the bottom wall, with the rolls arranged one above the other, the roller is placed outside the bunker and adjacent to the top of the rolls, and the slotted nozzle is installed in the bunker coaxially with the pipeline at the level of the gap between rolls. 7 3 Phia.2