Method for dynamically controlling loop angle of hot continuous rolling mill

Abstract

A method for dynamically controlling a loop angle of a hot continuous rolling mill adopts a strip steel rolling force detector, a strip steel speed detector, a loop angle detector, a strip steel tension detector, a basic automatic level control machine and a process control machine to conduct dynamic control on angles of six loops among seven continuous rolling mills according to the set process requirements, accordingly the stability of the loops during strip steel throwing is improved, specifically variable-angle control before strip steel throwing and a unary function loop angle compensation method are adopted to achieve continuous dynamic control in the control process according to change of angle and tension control, meanwhile synchronous and dynamic tension control is achieved in the tension control process according to angle change, and the stability of the loops in the strip steel throwing process is improved greatly.

Description

technical field [0001] The invention belongs to the field of steel rolling automation, and in particular relates to a dynamic control method for a looper angle of a hot continuous rolling mill. Background technique [0002] For the process control of hot-rolled strip steel, in the strip steel throwing control process, there are certain changes in the strip temperature, speed, and plate shape. At the same time, because the strip steel throwing process must The steel throwing speed is controlled, so it is difficult to control it in the continuous rolling mill frame, which leads to the large instability of the strip steel in the process of steel throwing, which seriously affects the Tail shape control during throwing steel. [0003] The application number is 00814067.7, and the patent titled "Control Device for Continuous Rolling Mill" provides a control device for continuous rolling mill. It is suitable for a continuous rolling mill in which a looper supporter rotated by a l...

AI Technical Summary

Problems solved by technology

[0007] At present, the looping control of hot rolling in the loop control process is determined by the tracking position of the strip. The looping amount of the loop itself is not classified and controlled according to the type of strip steel. As a result, some steel strips can be casted smoothly but some steel strips cannot be casted smoothly; in addition, because the falling sleeves cannot meet the increasing demand for strip steel, sometimes it often causes narrowing of the width tail and throwing steel flick problem

The above-mentioned patented technologies all involve the problem of the looper control of the hot continuous rolling mill, but none of them propose a solution to the above problems

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