Strip edge plate shape control method and system based on induction heating

Abstract

The invention discloses a strip edge plate shape control method and system based on induction heating. By means of a double-closed-loop control circuit manner, a plate shape control loop and a temperature control loop are adopted to conduct adjustment; compared with a traditional single-closed-loop control circuit, the debugging time is short, the control precision is high, and the interference resistance is high; by means of the plate shape control loop, plate shape deviation is calculated by a controller and then output to the temperature control loop as a temperature set value; in the temperature control loop, by measuring the temperature of a work roller, temperature rise of the work roller can be directly controlled, so that thermal expansion of the work roller can be controlled, thereduction of the edge portion of the work roller is changed, and finally improvement of the edge plate shape of the strip is achieved.

Description

technical field [0001] The application relates to a method and system for controlling the shape of a strip edge based on induction heating, in particular to a method and system for controlling the shape of a non-ferrous metal in a rolling process, and belongs to the technical field of non-ferrous metal processing control. Background technique [0002] In the rolling process of non-ferrous metals, the plate shape index is one of the most critical quality indexes. The shape performance of non-ferrous metal strip products directly affects the product quality and yield, and also affects the production efficiency of the product. Measures to improve the shape quality of non-ferrous metal strips, including strip and foil products, have been continuously paid attention to and researched. [0003] In the rolling process of non-ferrous metals, such as four-roll mills, roll bending, work roll tilting, and work roll cooling are generally used to adjust the plate shape to obtain the ide...

AI Technical Summary

Problems solved by technology

[0006] However, both methods have certain limitations

The first open-loop control method relies on manual observation and cannot achieve automatic adjustment

Although the second closed-loop control method realizes automatic adjustment, it adopts a single closed-loop system, such as figure 1 As shown, it depends on the feedback value of the shape measurement system, and the dynamic change process is completely dependent on the shape feedback value, and the response time is slow, and the shape measurement value at the edge of the strip, because the strip cannot completely cover the roll ring, the measurement does not It is not comprehensive and needs to be compensated by algorithms. There will be errors in such measurement values, which will easily lead to misoperation, and it is difficult to maintain stability in actual production.

Moreover, when this kind of controller is debugged on site, it is difficult to obtain satisfactory controller parameters due to the continuous change of process conditions.

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