Control method for preventing deviation of band steel in first-pass rolling procedures

Abstract

The invention discloses a control method for preventing deviation of band steel in first-pass rolling procedures. The control method includes that the band steel is centered by the aid of a CPC (coil planet centrifuge) device in band steel threading procedures after scrolling is carried out; uncoiling tension on the band steel on a reversible cold rolling mill with small roll diameters and a single framework is higher than reeling tension of pickling units by 20%-45%; reeling tension on the band steel on the reversible cold rolling mill with the small roll diameters and the single framework during first-pass rolling is higher than reeling tension of conventional rolling mills by 10%-20%; inlet turning clamping roll press rolls are positioned at turning locations and are pushed in whole first-pass rolling procedures, and an inlet pressure plate table is in a pushed state; the roughness of the surfaces of rolling mill working rolls is enlarged; first pass rolling is carried out by the aid of high roll bending force; roll gap inclination values are preset for first-pass starting rolling according to intrinsic attributes of rolling mill frameworks. The control method has the advantages that the rolling stability of the rolling mill with the small roll diameters can be improved by the aid of the control method, the probability of deviation breakage accidents can be lowered, and increase of roll consumption due to the deviation breakage accidents can be reduced.

Description

technical field [0001] The invention relates to the technical field of strip steel rolling control, and more specifically, relates to a control method for preventing strip steel from running off during the first pass of rolling. Background technique [0002] When rolling high-strength steel, silicon steel, stainless steel and other hard-to-deform strip steel, a single-stand reversing cold rolling mill with small roll diameter is usually used. Rolling with a small roll diameter can effectively reduce the rolling pressure and rolling moment, increase the reduction ratio of hard-to-deform steel strips, and greatly reduce the energy consumption of the rolling mill; the single-stand reversible model can give full play to its production organization Flexible, diverse product varieties and specifications. However, judging from the actual production effect of the single-stand reversing cold rolling mill with small roll diameter, it is exposed that the first pass of rolling is prone...

AI Technical Summary

Problems solved by technology

From the perspective of the strip deviation mechanism, the friction state between the strip steel and the rollers affects the deviation of the strip steel, increasing the tension of the strip steel, and the transverse static friction between the strip steel and the rollers becomes larger, which is conducive to the stability of the strip steel operation and improve the ability to resist lateral disturbance; while the reduction of strip uncoiling tension reduces the ability to resist lateral disturbance of the strip and reduces the stability of the high-speed rolling process

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