A self-adaptive working roll box of a tension leveling scale breaker

Abstract

The invention discloses a self-adaptive working roll box of a tension-leveling and descaling machine, which belongs to the technical field of metal rolling. The self-adaptive working roll box comprises a roll box body. The roll box body is provided with a working roll, a supporting roll assembly which is used for supporting the working roll, an anti-shifting device which is used for preventing axial shifting of the working roll, and a roller assembly which is used for realizing sliding of the roll box body. The roll box body comprises a base I and a base II which is positioned with and connected with the base I through a connector. An elastic deformation mechanism is arranged between the base I and the base II. In operation of the self-adaptive working roll box, through the self-adaptive elastic deformation of the elastic deformation mechanism, the working roll has functions of realizing automatic adaption for the type of an inlet strip steel and automatically adjusting the bearing force with the surface of hot rolled strip steel, so that uniform wearing on the surface of the working roll is realized as possible, thereby prolonging service life of the working roll, reducing roll changing frequency and furthermore reducing production operation cost of the tension-leveling and descaling machine.

Description

technical field [0001] The invention belongs to the technical field of metal rolling, and relates to an accessory device used on a stretching leveling scale breaking machine before pickling hot-rolled strip steel in a combined pickling rolling unit or a continuous pickling unit, in particular to a tensioning leveling scale breaking machine Adaptive work roll cassette. Background technique [0002] In the combined pickling unit or continuous pickling unit, in order to improve the pickling efficiency of the hot-rolled strip, it is usually necessary to descale the surface of the hot-rolled strip before pickling. Key equipment for iron oxide scale. Since the iron oxide scale on the surface of the strip steel is a brittle material, while the base material is an elastic-plastic material, when the strip steel passes through the tension leveling machine, the strip steel on the side in contact with the working roll of the tension leveling machine is compressed and deformed, making i...

AI Technical Summary

Problems solved by technology

[0003] In production, when the hot-rolled strip passes through the tension leveler, it will contact the work roll. Since the work roll is a driven roll, there will be friction between the two, resulting in wear on the surface of the work roll.

If the shape of the incoming material is good, the surface of the work roll will wear evenly, but in most cases, the shape of the hot-rolled raw material is not ideal, and there are various wave shapes. The rigidity of the working roll box of the machine is relatively good, so when the strip passes through the work roll of the tension leveling machine, the strip pressure on the surface of the work roll is usually unevenly distributed, so that after the work roll has been working for a period of time, the local The wear of the roll surface is relatively serious, that is, a thin waist-shaped area is formed at both ends of the work roll. This shape is small in the middle and large at both ends, and the existence of the camber will also increase the wear of the work roll

When the width of the strip steel is narrowed, the severely worn work roll can still be used. Once the strip steel with a width specification greater than the uniform roll surface length of the work roll is produced, because the strip steel passes through the thin waist-shaped area on the work roll At this time, the oxide scale on the surface of the strip steel in this area cannot be effectively removed due to uneven deformation. At this time, new work rolls must be replaced, otherwise it will seriously affect the subsequent pickling effect and rolling quality of the hot-rolled strip steel, thereby affecting final product quality

Therefore, the existing roll box structure will lead to short service life of the work rolls and increase the frequency of roll changes, which affects the normal operation of the unit to a certain extent and increases the production and operation costs

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