RU2253524C1 - Outlet roll fitting of rolling mill - Google Patents

Abstract

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

SUBSTANCE: outlet roll fitting includes box-shaped housing secured to beam of fitting. In said housing are arranged: outlet passes mounted along rolling line, outlet guides rested by their noses upon respective roll and by their foots - upon one of guide beams arranged in housing, roller holders supporting rollers fit on axles and provided with bearing assemblies. Said rollers are mounted in roller holders with possibility of rotation in direction coincided with rolling direction and they have members for tuning and fixing mentioned above parts relative to housing. Working surface of each roller of liner is formed of separate rings with shaped lateral surface. Each ring is provided with its own bearing assembly and it may rotate autonomously on axle of roller.

EFFECT: enhanced quality of surface of rolled strip 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 output boxes installed on the reinforcing bars of the working stands are used to remove the rolled metal from the rolls, straighten it and transfer it to the next stand for further processing. Use slip boxes (Modern designs of rolling reinforcement of rolling mills / Album edited by Gritsuk NF M .: NIIINFORMTYAZHMASH, 1968. 295 p .; p. 82) and rolling boxes (Modern designs of rolling reinforcement of rolling mills / Album for Edited by Gritsuka N.F. M .: NIIINFORMTYAZHMASH, 1968. 295 p .; p.61), where, in order to reduce the wear of replaceable parts of the reinforcing unit and improve the surface quality of the rolled strip when it is straightened by the output rolling reinforcement, freely rotating rollers are used. The latest design is most widespread. In it, the rollers, the direction of rotation of which coincides with the direction of rolling, are located in the output passes installed in the case-box (Modern design of rolling reinforcement of rolling mills / Album edited by N. Gritsuk. NIIINFORMTYAZHMASH, 1968. 295 p .; p. 120). The working surface of the rollers is profiled taking into account the configuration of the strip rolled in the cage and in the general case is not straight (Chekmarev A.P., Chernobrivenko Yu.S. Roller reinforcement of rolling mills. - M .: Metallurgy, 1964. 256 p.; P. 219 , Fig. 99, a). In contact with a moving strip, the roller of the output rolling reinforcement rotates at a constant frequency. If the side surface of the roller is a body of revolution, the shape of which is different from the straight cylinder, then the points of its side surface lying on 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.

A design is known where, in order to reduce wear of the working surface of the roller, an annular groove is made in its middle part, which excludes the contact of the rolled metal with the roller in this section (Chekmarev A.P., Chernobrivenko Yu.S. Roller reinforcement of rolling mills. - M.: Metallurgy , 1964.256 s .; p. 219, fig. 99, d, f). The straightening of the rolled section is provided only by the extreme parts of the working surface, 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 of an identical output roller box, where the working surface of the roller has a profile composed of two sections of parabolas (Chekmarev A.P., Chernobrivenko Yu.S. Roller reinforcement of rolling mills. - M .: Metallurgy, 1964 256 s .; p. 219, fig. 99, d). Each pair of thus profiled rollers form a so-called “lancet” caliber. Such a shape of the working surface reduces the length of the contact line between the metal and the roller 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 when it leaves the gauge, then 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 straightened reinforcement of the 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 the case (box) mounted on the reinforcing bar of the stand with the output passes installed in it along the rolling line, output wires, resting their socks on the corresponding roll, and their heels on one of the wire wires located in the case bars, as well as roller holders located in the housing, in which rollers mounted on the axis are mounted, equipped with bearings, with the possibility of rotation in the direction coinciding the rolling direction, and the parts that provide the adjustment and fixation of the above parts relative to the housing, characterized in that the working surface of each roller is formed of separate rings with a profiled side surface, each of which is equipped with its own bearing, with the possibility of rotation independently from each other on the axis video clip.

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

In figure 2. A sketch of the new design of the roller of the output roller reinforcement is presented.

The outlet roller reinforcement consists of a cage 1 (box) installed on the reinforcing bar of the cage 1 with output passes 2 located in it along the rolling line, output wires 3, resting their socks on the corresponding roll, and heels on one of the two wire bars 4 located in the housing 1, and roller holders 5 installed in the housing 1, equipped with rollers 6 freely rotating on them, the rotation direction of which coincides with the rolling direction. The adjustment and fixing of the listed parts relative to each other is provided by fasteners 7. The working surface of each roller 6 is formed by a set of separate annular sections 8, rotating on their bearings 9 on a common axis 10.

The device works as follows: getting into the inlet armature, the moving strip is guided by the output passes 2 located in the housing 1 and the output wires 3, supported by the rolls and wire rods 4 located in the housing 1, into the rollers 6, the axes 10 of which are mounted on the housings 1 roller holders 5, and the position of the latter is fixed relative to the housing 1 by means of fasteners 7, providing a constant gap between the rollers 6, corresponding to the size of the strip section. The profiled rings 8 that make up the working surface of the roller 6, located on the common axis 10, begin to rotate on their bearings 9 as soon as they come in contact with a moving metal. Moreover, each ring 8 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 8 of the rollers 6 of the inlet reinforcement naturally slows down to a complete stop.

The technical result is the rotation with a peripheral speed close to or coinciding with the speed 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 rollers slip on the strip surface, the wear of the working surfaces of the rollers is reduced, the surface quality of the rolled strip is improved . 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)

Outlet roller reinforcement of the rolling mill, including a box-case mounted on the reinforcing bar with output passes installed on it along the rolling line, output wires resting with their socks on the corresponding roll, and with their heels on one of the wire bars placed in the case, as well as located in case-box with roller holders in which rollers mounted on an axis are mounted, provided with bearings, with the possibility of rotation in the direction coinciding with the direction of rolling, and parts and providing adjustment and fixation of the above parts relative to the housing-box, characterized in that the working surface of each roller is formed of separate 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.

Images