A method for controlling the thickness of hot-rolled finish-rolled strip steel

Abstract

The invention provides a hot-rolling and finish-rolling strip steel thickness control method which is especially suitable for metal rolling mills or control devices for machining products, and particularly relates to a method for controlling the thickness of hot-rolling and finish-rolling strip steel through computer programs. According to the detection value of rolling actual performance value of a machine frame, the thickness of strip steel at the outlet of the machine frame is calculated; the moment the calculated strip steel thickness data reaching the machine frame is tracked and combined with the rolling actual performance value data, the plasticity coefficient of the strip steel passing through the machine frame is calculated in real time; according to the plasticity coefficient, which is obtained through real-time calculation, of the strip steel, the roll gap adjustment amount of the machine frame is determined, and feed-forward control is carried out on the thickness of the strip steel in real time. The control method can accurately obtain the plasticity coefficients of different sections of the strip steel, the plasticity coefficients are shown in roll gap adjustment amount of the different sections so as to be adaptive to hardness changes of the strip steel, control precision of the thickness of a finish rolling area is improved, a software programming control method is adopted, hardware investment is not needed, and the method is widely applied to new production lines and production line renovation projects.

Description

technical field [0001] The invention relates to a control device or method specially suitable for a metal rolling mill or its processed products, in particular to a method for controlling the thickness of a hot-rolled finish-rolled strip by using a computer program. Background technique [0002] The thickness accuracy of hot-rolled products has always been one of the most important quality indicators. The Automatic Gauge Control (AGC) model uses a thickness gauge or other sensors to continuously directly measure or indirectly calculate the rolled thickness of the strip, and input the deviation between the measured value or the calculated value and the set value to the automatic control device, and the control device passes through the logic Judgment and model calculation obtain the adjustment amount of roll gap and mill speed and send them to the pressing positioning system and mill speed adjustment system. By adjusting the roll gap and mill speed, the exit thickness of the ...

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to provide a method for controlling the thickness of the hot-rolled finish-rolled strip, by tracking the actual performance value of the strip-rolled steel, calculating the plastic coefficient of the strip steel and the adjustment amount of the roll gap in real time, and solving the problem of the thickness of the hot-rolled finish-rolled strip steel in the prior art Technical problem of poor control accuracy

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