Leveling control method of finishing mill

Abstract

The invention discloses a leveling control method of a finishing mill. The transmission side and the operation side below a looper roll are respectively provided with a tension meter in advance, and the tension meters are used for respectively measuring tensions of strip steel at the transmission side and the operation side. When leveling control needs to be carried out, the method comprises the steps of: A, calculating a center line maximum deviation and a center line actual deviation, if the center line actual deviation is more than the center line maximum deviation, executing the step B, and if not, ending the process; B, calculating the convexity angle of the strip steel in the current position, calculating the leveling value of a unilateral wave according to the convexity angle, the center line maximum deviation and the center line actual deviation; and C, carrying out leveling control by adopting the leveling value of the unilateral wave. By adopting the method, the labor intensity of operators can be reduced and the leveling precision is improved.

Description

technical field [0001] The invention relates to hot rolling technology, in particular to a leveling control method of a finish rolling mill. Background technique [0002] In the hot rolling process, the finishing mill is used to determine the specific thickness, width and shape of the strip. Ideally, the thickness of the strip should be equal at each position at the same distance from the slab centerline of the strip. That is to say, the thickness of the strip steel is distributed symmetrically with respect to the slab centerline of the strip steel, but, due to various reasons, in practical applications, the thickness of the strip steel may not be symmetrically distributed with respect to the slab centerline , a wave pattern appears. In practical applications, with the slab centerline as the center of symmetry, one side of the strip is called the operating side, and the other side is called the transmission side, and the side closest to the operator is usually called the op...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, in order to eliminate the wave type, the operator judges the wave type according to the actual observation on site, and determines the leveling value based on experience, so as to manually level the finishing mill. The principle of the leveling control is: when When the wave is on the transmission side, press the transmission side and lift the operation side; when it is the wave on the operation side, lift the transmission side and press the operation side. In this way, the labor intensity of the operator is relatively large, and if the operator makes a wrong judgment on the wave shape, it may Lead to scrap steel, low leveling accuracy

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