SU1340841A1 - Multihigh pass for deformation of metal - Google Patents

Abstract

The invention relates to the processing of metals by pressure, namely the production of a high-grade metal by rolling or drawing it through a gauge formed by rollers. The purpose of the invention. - expanding the technological capabilities of the equipment, improving the quality of products and reducing roll wear. Applying a low-melting alloy (Wood alloy) on the working and supporting surfaces of the work rolls in combination with caliber equipment with heating coolants allows alternate use of the liquid and solid alloy phases: the alloy on the working surface of the rolls in the liquid state plays the role of lubricant, increases stretching, reduces the amount of total deformation, in the solid state protects the rolls from damage. Similarly, an alloy on supporting surfaces does not allow burrs to form and acts as a lubricant between the supporting surfaces and the casing. 1 hp f-ly, 3 ill. (L io. Ji eo 4;

Description

The invention relates to the processing of metals by pressure, namely the production of a high-grade metal by rolling or drawing it through a gauge formed by rollers.

The purpose of the invention is to expand the technological capabilities of the equipment, improve the quality of products and reduce wear of the rolls.

Fig. 1 shows a multi-roll gauge for deforming a metal; FIG. 2 shows the rolls of the device, view from the entrance side of the metal; in fig. 3 is a diagram of a phase change of a low-melting alloy state on the surface of the rolls.

The device STANDS out of the housing 1, rolls are placed in the crtori (deforming elements 2-5, in this case four). A layer of low-melting metal 8 (Wood alloy), highlighted in FIG. T and 2 with a thickened line, is applied to the workers 6 and the supporting 7 surfaces of the rolls 2-5. In front of the housing 1 with rollers 2-5, means 9 are installed for cooling the surfaces of the rollers 2, 4 and the means 10 for heating the surfaces of the rollers 2, 4, 3 and 5, with the help of which the solid and liquid phases of its melting metal 8 are formed. and working 6 surfaces of the rolls 2-5.

Fig. 3 shows a diagram of two adjacent rolls 2 and 3 placed in housing 1, which shows the phase change of the low-melting metal on the surfaces of rolls 2 and 3 depending on the position of the surface to the deformation zone and the number of the roll where: AB and BC - solid phase fusible alloy; CDA and CD, A | B - liquid phase of the alloy. Means of heating and cooling can be of any design.

The device works as follows.

During the rotation of the rolls 2-5 during the formation of the metal 11, the low-melting metal 8, for example, Wood alloy deposited on the surfaces 6 and 7 of the rolls 2-5 and located on the rolls 2-5 of the liquid phase (zone CDA and CD | A (B ), is cooled by the node 9 on the surface of the rollers 2 and 4 until it passes into the solid phase (zone AV of the rollers 2 and 4). During the last rotation, the supporting surface 7 of the rolls and 4 is in contact with the liquid phase

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alloy found. } ia with the surfaces 7 of the rolls 1 and 3 5, it reaches its solid phase and fills the gap between the supporting surfaces. 7 adjacent rolls 2,3; 3.4; 4.5; 5.2 (zone of aircraft).

The sufficient ductility of the low-melting metal 8 in the solid state allows onopvibiM surfaces. m 7 adjacent rolls in the area of the sun and the alloy between them move as a whole until you get the deformation zone (point C), where it melts with the means 10 preheating. Thus, on arc Z, there is a filling of the roll gap with a Wood alloy, which prevents the deformable material from flowing into the gap.

Q Surfaces of rolls 15 2 to 5 with the Wood alloy in the liquid phase located on them, income from body 1, which forms a slip bearing with rolls 2-5. In this case, the liquid phase of the alloy

5 plays the role of a lubricant on the contact of the slip-on pair. The passage through the zone forming the Slide support, the surfaces of the rolls with the alloy in the liquid phase approach the beginning of the deformation zone, and

0 cycle repeats.

The Wood alloy applied to the working surfaces 6, when in contact with cold processed metal 11, passes into the solid phase 5 forming a protective layer on the working surface 6 of the rolls 2-5 preventing the wear of the working surface 6 of the rolls during plastic processing, is heated by means 10 and in the liquid phase transported to the entrance to the deformation zone.

The proposed device has wider technological capabilities in comparison with the known ones, namely: the stretching increases due to the reduction of transverse deformations, which increases the productivity by 5-15%; The amount of suckering deformation at the same stretch is reduced, which reduces the amount of intermediate heat treatments, contributing to a significant increase in productivity and the cost of production of the product.

When processing bimetallic materials, no detachment occurs due to non-uniformity of deformation in the areas of the shaft-x-5 connector; which in the proposed device :: zedy to me

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five

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five

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Mu Mu. The processing of composite and powder materials does not require subsequent scalping, which saves metal and reduces the cost of the process. The possibility of using a layer of low-melting metal as a lubricant between the bearing surfaces of the rolls and the device body simplifies the operation of the device, eliminating the need to install a lubrication system,.

The presence of a fusible alloy on the working surface of the rolls protects the rolls from mechanical wear, thereby increasing the service life of the device. In addition, it allows the processing of hard-to-deform materials.

Claims (2)

Claim 1. Multi-roll gauge for metal deformation, including installations one Lenky rolls in the housing with working and supporting surfaces, the latter rolling on the housing and adjacent rolls in contact with each other, characterized in that, with the aim of expanding the technological capabilities of the equipment, improving the quality of products and reducing wear:; rolls, a layer of low-melting metal, predominantly Wood's alloy, is deposited on the supporting surfaces of the rolls, and the caliber is provided with a means of cooling the surface of the rolls at the entrance to caliber and means of heating the surface of the rolls at the exit from the caliber. 2. The caliber of claim 1, characterized by the fact that the layer of low-melting metal is also applied to the working surface of the rolls. Fi.G (pL / e. 2 Oklat-h Fi.Z