RU2253526C1 - Outlet roller fitting of rolling mill - Google Patents

Abstract

FIELD: rolled stock production, namely outlet roll fitting of rolling mill.

SUBSTANCE: outlet roll fitting includes pair of outlet liners secured to beam of stand. Rollers provided with bearing assemblies are mounted in said liners on axle with possibility of rotation in direction coincided with rolling direction. Between liners there are one or more outlet guides. Each guide rests by its one end upon beam of guide; other end of outlet guide engages with roll. Working surface of each roller of liner is formed of separate rings with shaped lateral surface. Each ring has its own bearing assembly and may rotate autonomously on axle of roller.

EFFECT: enhanced quality of strip rolled surface due to elimination of roller slip on strip surface.

2 dwg

Description

The invention relates to rolling production and can be used on section rolling mills when rolling simple and especially shaped sections from ferrous and non-ferrous metals and alloys.

The typical design of the outlet reinforcement is a pair of outlet rulers installed on the reinforcing bar of the working stand, between which there are one or two wires in contact with the rolls. Postings provide the removal of the profile rolled in caliber, and the rulers, protecting it from bending, are sent to the next stand for further processing. In section rolling production, lead-out slide lines are used (Modern designs of roll reinforcement of rolling mills / Album edited by Gritsuk NF M .: NIIINFORMTYAZHMASH, 1968, 295 p .; p. 77) and lead-out rolling lines (Modern designs of roll reinforcement of rolling mills / Album edited by Gritsuk NF M .: NIIINFORMTYAZHMASH, 1968, 295 p .; p. 47), where, in order to reduce wear of the working surfaces of the rulers and improve the quality of the surface of the rolled strip, each is usually equipped with one freely rotating roller. The latest design is most widespread. In it, the direction of rotation of the rollers coincides with the direction of rolling, and the working surface of the rollers is profiled taking into account the configuration of the strip rolled in the stand and in the general case is not straight (Chekmarev A.P., Chernobrivenko Yu.S. Roller reinforcement of rolling mills. - M .: Metallurgy, 1964, 256 pp .; p. 219, fig. 99, a). In contact with a moving strip, the roller rotates at a constant frequency. If the lateral surface of the roller is a body of revolution, the shape of which is different from the straight cylinder, then the points of its lateral surface lying at different diameters have different peripheral speeds. This leads to slipping of individual sections of the working surface of the roller relative to the moving translationally with a constant speed of the strip. The consequence is a significant wear of the working areas of these parts and premature failure of the reinforcing unit.

Known design (Chekmarev A.P., Chernobrivenko Yu.S. Roller reinforcement of rolling mills. - M .: Metallurgy, 1964, 256 pp .; p. 219, Fig. 99, d, f), where, in order to reduce the wear of the working An annular groove is made on the surface of the roller in its middle part, which excludes contact of the rolled metal with the roller in this section. The straightening of the rolled section is ensured by the sections of the working surface remaining on the edges of the roller, which often have a significant slope to the axis of rotation, which causes a significant difference in peripheral speeds on them. This also leads to slipping of the rollers on the rolled strip and their premature wear.

The closest in technical essence is the design identical to the device output roller line, where the working surface of the roller has a profile made up of two sections of parabolas. Each pair of thus profiled rollers form the so-called “lancet” caliber (Chekmarev A.P., Chernobrivenko Yu.S. Roller reinforcement of rolling mills. - M.: Metallurgy, 1964, 256 pp .; p. 219, Fig. 99, d). Such a shape of the working surface reduces the length of the line of contact with metal inclined to the axis of rotation of the roller, thereby reducing slippage caused by the difference in speed of the working surface of the roller and metal. Moreover, if the roll reinforcement provides straightening of the strip after it is out of caliber, due to a decrease in the contact area between the metal and the roller, the contact pressure increases, since the forces arising during plastic bending of the rectified strip are distributed over a smaller area of the working surface of the roller.

The disadvantages of this design are:

- wear of the working surfaces of the rollers due to slipping of individual sections of the working surface of the roller relative to the moving translationally with a constant speed of the strip;

- wear of the working surfaces of the rollers due to high specific pressures at the point of contact of the metal and the working surface of the roller;

- deterioration in the surface quality of the rolled metal due to slipping of the reinforcement rollers.

The technical task is to reduce wear of the working surfaces of the rollers of the output rolling reinforcement.

In the proposed technical solution, the output rolling reinforcement of the rolling mill, including a pair of output rulers fixed to the reinforcing bar of the stand, in which rollers are mounted on the axis and equipped with bearings, can rotate in the direction coinciding with the rolling direction and are located between the rulers by one or more output wiring, each of which at one end rests on a reinforcing (wire) beam, and the other is in contact with the roll, differs in that the working surface of each roll The ruler is formed of separate rings with a profiled side surface, each of which is equipped with its own bearing, with the possibility of their rotation independently of each other on the axis of the roller.

Figure 1 presents a sketch of the new design of the output roller bars.

Figure 2 presents a sketch of the new design of the roller output roller reinforcement.

The output rolling reinforcement of the rolling mill consists of output rulers 1 installed and fixed on the reinforcing bar of the cage 1 with rollers 2 freely rotating on them, the direction of rotation of which coincides with the direction of rolling, and one or more output wires 3 located between the rulers 1, each of which has one end relies on a reinforcing (wire) beam, and the other is in contact with the roll. The adjustment and fixing of the listed parts relative to each other is provided by fasteners 4. The working surface of each roller 2 is formed by a set of separate annular sections 5, rotating on their bearings 6 on a common axis 7.

The device operates as follows.

The rolled strip is removed from the caliber by wires conducting in contact with its streams 3. Moving along it, the strip passes between the output rulers 1, which ensure its direction into the rollers 2, whose axes 6 are located on the rulers 1 near the rear end of the heel of the wire 3, resting on the reinforcing bar of the stand and located between the rulers 1, the position of the rulers 1 is fixed relative to the rolls by means of fasteners 4, providing a constant clearance between the rollers 2, corresponding to the size of the strip section. The profiled rings 5 that make up the working surface of the roller 2, located on a common axis 7, begin to rotate on their bearings 6 as soon as they come in contact with a moving metal. Moreover, each ring 5 in contact with a certain section of the profile of the rolled strip rotates with its frequency, and its peripheral speed is close to or coincides with the speed of the moving metal. When the rolled metal exits the reinforcing unit, the rotation of the rings 5 of the rollers 2 of the outlet reinforcement naturally slows down to a complete stop.

The technical result is rotation at a peripheral speed close to or coinciding with the speed of movement of the rolled strip of each of the rings with a profiled side surface that make up the working surface of the output line roller, as a result of which the slipping of the rollers on the strip surface is reduced, the wear of the working surfaces of the rollers is reduced, the quality of the rolled surface is improved stripes.

The proposed design is most appropriate to use when rolling shaped profiles made of ferrous metals, as well as when rolling simple and shaped profiles made of non-ferrous metals and alloys, prone to sticking to rollers of roller reinforcement during slipping.

Claims (1)

The output rolling reinforcement of the rolling mill, including a pair of output rulers fixed to the reinforcing bar of the stand, in which rollers are mounted on the axis, provided with bearings, with the possibility of rotation in the direction coinciding with the direction of rolling, and located between the rulers of one or more output wires, each of which one end rests on a reinforcing wire bar, and the other is in contact with the roll, characterized in that the working surface of each roller of the line is formed of separate x rings with a profiled side surface, each of which is equipped with its own bearing with the possibility of rotation independently of each other on the axis of the roller.

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