Method and device for controlling casting speed and casting strip thickness of thin strip continuous casting machine

Abstract

The application discloses a method and device for controlling the casting speed and the thickness of the casting strip of a thin strip continuous casting machine, and relates to the field of metallurgy technology. Billet shell thickness; calculate the current solidification coefficient of the casting roll according to the original billet shell thickness; determine the current target casting speed according to the solidification coefficient and the target casting strip thickness; calculate the current flow distribution according to the actual steel flow of the production line in a steady state The flow coefficient of the flow distribution bag; according to the current flow coefficient of the flow distribution bag and the target pulling speed, the adjustment range of the liquid level in the flow distribution bag is determined; the PID controller for the liquid level of the flow distribution bag is designed to achieve precise control by controlling the position of the middle bag stopper The purpose of the liquid level in the ladle; design the PID controller for casting roll speed, through controlling the liquid level in the ladle, combined with the liquid level control link of the molten pool, to achieve the purpose of accurately controlling the casting speed of the casting roll; design the casting strip thickness PID The controller achieves the purpose of precisely controlling the thickness of the cast strip by controlling the casting roll speed.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a control method, device, computer equipment and computer storage medium for the casting speed and thickness of a thin strip continuous casting machine. Background technique [0002] Compared with conventional continuous casting, thin strip continuous casting saves multiple processes such as ingot heating, billet opening and multi-pass rolling, and saves a lot of labor costs and energy costs; saves the process of ingot milling, reduces Cutting the head and tail after hot rolling improves the yield; small footprint, simple and centralized equipment, and small initial investment; has unique sub-rapid solidification characteristics, special microstructure, and superior performance; the thickness of the obtained cast strip is close to the final product Thickness has obvious advantages for the preparation of some low plastic materials, difficult-to-process materials and functional ...

AI Technical Summary

Problems solved by technology

[0005] In the existing technology, it is proposed to change the rolling force to control the strip thickness through the action of the roll gap. This method has a small influence on the strip thickness; there is a process window for the rolling force of the thin strip continuous casting casting roll. Once the rolling force is adjusted out of the A suitable process window will cause quality defects such as cracks or shrinkage cavities in the casting belt, resulting in unqualified product quality; frequent movement of casting rolls will affect the service life of the side seal plate, and excessive movement range can even directly cause the side seal plate to break , leading to production accidents

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