Control method for solving problem of rolling narrowing of silicon steel tail of hot-rolled steel strip

Abstract

The invention relates to the field of automatic control for finish rolling of a rolling line for continuous-hot-rolled strips. According to a control method for solving the problem of rolling narrowing of the silicon steel tail of a hot-rolled steel strip, a control procedure for adjusting the loop moment and the compensation speed is developed during silicon steel rolling by fully utilizing the characteristics of advancement and operability of the computer control technique, the hidden danger of movement abnormities of a loop is eliminated, the equipment fault time is shortened, the problem of rolling narrowing, caused by instability of the loop, of the tail of the steel strip is solved, the product quality is improved, and good benefits are achieved. The control method is suitable for control over a finish rolling machine for the hot-rolled steel strip.

Description

technical field [0001] The invention relates to the field of automatic control of finish rolling of hot continuous strip steel rolling line. Background technique [0002] During the continuous rolling process, the strip steel in the finishing rolling unit has to go through the rolling sequence of head biting, establishing tension in continuous rolling, and throwing steel, so that the looper device starts from the set, swings with the strip, and falls. It consists of three main processes. In the conventional looper control, it has been decoupled from the two relatively independent systems of the set amount and the torque for control. The set amount adjustment is realized through the speed adjustment of the main engine, and the torque adjustment is carried out through the looper servo system. [0003] With the development of silicon steel varieties and the increase of billet unit weight, when rolling in the finishing rolling area, due to the lower temperature of the tail of t...

AI Technical Summary

Problems solved by technology

[0003] With the development of silicon steel varieties and the increase of billet unit weight, when rolling in the finishing rolling area, the temperature of the tail of the strip becomes lower, resulting in a large change in the shape of the tail of the strip, resulting in the looper torque between the finishing stands and the speed of the main machine. The adjustment does not match, resulting in narrowing of the tail of the strip and poor product quality, which seriously affects the normal production of the rolling line and brings great economic losses