Induction heating roller temperature prediction method for edge part of working roller of aluminum strip cold-rolling mill

Abstract

The invention relates to an induction heating roller temperature prediction method for the edge part of the working roller of an aluminum strip cold-rolling mill. The method comprises the following steps that S1, obtaining roll parameters, plate strip parameters and rolling process data; S2, performing differential grid division on the cross section of the roller, numbering grid nodes, and establishing a finite difference model; S3, determining boundary conditions and an internal heat source according to process parameters in different rolling processes; S4, converting the heat conduction differential equation into a difference equation format by adopting an explicit-implicit staggered difference scheme; and S5, solving the differential equation set by adopting a catch-up method and a Gauss-Seidel method to obtain a transient temperature field of the roller. According to the method, the defect that the edge of the working roller is heated completely by experience due to lack of a roller temperature sensor of an existing cold rolling mill is overcome, accurate implementation of induction heating operation based on supervision is achieved, the accuracy of temperature drop control of the edge of the roller is improved, and production accidents caused by overhigh roller temperature are avoided.

Description

technical field [0001] The invention relates to the field of detection of rolls in cold rolling mills, in particular to a temperature prediction method for induction heating rolls at the edges of working rolls in aluminum strip cold rolling mills. Background technique [0002] When aluminum strip cold rolling mills roll wide and thin aluminum alloy strip products, tight edge rolling is prone to occur, especially for high-speed rolling and high-strength aluminum alloy products, and this problem is more serious. Tight-edge rolling not only causes poor strip shape and edge cracks, but more seriously causes strip breakage, affecting normal production. The roll is heated by edge induction to reduce the temperature drop at the edge of the roll, thereby effectively improving and eliminating the phenomenon of tight edge rolling, which has the advantages of fast heating and high efficiency. [0003] During the induction heating process of the roll edge of the cold rolling mill, it i...

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Problems solved by technology

[0004] In view of this, the purpose of the present invention is to provide a method for predicting the temperature of the edge of the work roll of the aluminum strip cold rolling mill by induction heating, which overcomes the problem that the edge of the work roll is heated entirely by experience in the existing cold rolling mill due to the lack of a roll temperature sensor. Defects

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