Eccentricity compensation method for cold rolling mill upstream rolling mill roll

Abstract

The invention relates to the field of plate-strip cold rolling mills, and discloses an eccentricity compensation method for a cold rolling mill upstream rolling mill roll. The method comprises the steps that firstly, a rotation angle of an upstream rolling mill roll is calculated; secondly, a strip outlet thickness difference measured by an outlet thickness gauge is used as an analytical signal source, and a fundamental wave of a signal of which the wave length is the same as the perimeter of the upstream rolling mill roll and amplitude values and phase positions of all subharmonic components are obtained through the Fourier analysis; lastly, an amplitude value and phase position of the needed compensation adjustment amount is obtained through calculation. According to the eccentricity compensation method for the cold rolling mill upstream rolling mill roll, the problem that the thickness precision of cold rolling products is poor caused by cyclical fluctuation of the incoming material thickness can be effectively solved, therefore, the quality and the yield of the cold rolling products are correspondingly improved, and meanwhile the economic benefit of producers is improved.

Description

【Technical field】 [0001] The invention relates to the field of strip cold rolling mills, in particular to an eccentricity compensation method used in a thickness control system of a strip cold rolling mill to avoid periodic fluctuations in incoming material thickness caused by roll eccentricity in an upstream rolling mill. 【Background technique】 [0002] As known, according to the technical requirements of metal rolling, the strip and foil rolling process needs to go through multiple processes such as hot rolling or cast rolling, as well as cold rolling and foil rolling; The process of assembly, wear or thermal expansion may cause the irregular shape of the roll, and the irregular shape of the roll can easily cause its rotation axis and geometric axis to not completely match. At the same time, the existing hot rolling mill or casting rolling mill The control system does not have the roll eccentricity compensation function, so the roll eccentricity phenomenon will occur durin...

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Problems solved by technology

[0004] In order to overcome the deficiencies in the background technology, the present invention discloses a method for compensating the roll eccentricity of the upstream rolling mill of the cold rolling mill. problems, thereby improving the quality and yield of cold-rolled products accordingly, and at the same time improving the economic benefits of the producer

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