Additional given control method for hot continuous rolling silicon steel looper

Abstract

The invention relates to an additional given control method of a hot continuous rolling silicon steel movable sleeve, belonging to the field of metallurgical rolling. According to the method, when the given torque of strip steel is judged to be larger than the actual torque of the strip steel by a controller, the movable sleeve of the strip steel is proved to have the phenomenon of virtual sheathing; the controller is used for controlling a servo valve in a point-to-point way by a transformation channel; the additional given value calculated by the controller and the value given by the servo valve are correspondingly transformed into current values by the transformation channel; the current is applied to the servo valve by a cable, so that the servo valve acts. After the method is adopted, the finish rolling movable sleeve can be automatically controlled, off tracking and pack rolling which are caused by virtual sheathing of the strip steel movable sleeve can be eliminated, the great hidden danger of damage to equipment can be avoided, and abnormal stop time is shortened.

Description

technical field [0001] The invention belongs to the field of metallurgical steel rolling, and relates to a control method for looper addition setting of hot continuous rolling silicon steel. Background technique [0002] There are five hydraulic loopers from 0# to 5# in the hot continuous rolling finishing mill. The plasticity of the silicon steel between the rolling stands is poor, and the shape of the plate changes greatly; in addition, the hydraulic looper servo valve is a proportional servo valve, and the response speed is slightly poor, which shows that the looper does not match (the looper does not match, that is, the strip looper control gives When the constant torque is greater than the actual torque of the strip steel), the looper is adjusted slowly, which makes the strip steel easy to deviate and roll, resulting in poor quality of the strip steel product, and in serious cases, directly scrap steel between the racks, affecting the normal production of the rolling li...

AI Technical Summary

Problems solved by technology

[0002] There are five hydraulic loopers from 0# to 5# in the hot continuous rolling finishing mill. The plasticity of the silicon steel between the rolling stands is poor, and the shape of the plate changes greatly; in addition, the hydraulic looper servo valve is a proportional servo valve, and the response speed is slightly poor, which shows that the looper does not match (the looper does not match, that is, the strip looper control gives When the constant torque is greater than the actual torque of the strip steel), the looper is adjusted slowly, which makes the strip steel easy to deviate and roll, resulting in poor quality of the strip steel product, and in serious cases, directly scrap steel between the racks, affecting the normal production of the rolling line. cause great economic loss

Therefore, it is necessary to solve the problem of slow adjustment when the looper is false.