Control method of head shearing speed of flying shears for hot continuously rolled band steel

Abstract

The invention provides a control method of the head shearing speed of a pair of flying shears for hot continuously rolled band steel and belongs to the technical field of metallurgy. The control method comprises the steps that firstly, an HMD60 hot metal detector is installed at the position 3 meters away from the flaying shears; secondly, the head shearing speed of the flying shears is set to be 0.8 m / s- 1.5 m / s; thirdly, no band steel exists in the area of the flying shears, the speed of a roller way in the area of the flying shears is 0.8 m / s- 1.5 m / s; and fourthly, when the band steel passes through the area of the flying shear, the speed of the roller way in the area of the flying shear is the product of the F0 machine frame speed actual value and the F0 machine frame backward slip coefficient. By the adoption of the control method of the head shearing speed of the pair of flying shears for the hot continuously rolled band steel, the influence of frequent change of the speed of the roller way on the actual band steel speed is eliminated, and the problem of the influence of faults of a laser velocimeter on production operation is also solved; and the stability of band steel head shearing control is achieved, and fault time is shortened.

Description

technical field [0001] The invention belongs to the field of metallurgy and relates to the automatic control of the speed in the finish rolling area of ​​hot continuous rolling strip steel. Background technique [0002] The finishing rolling area of ​​hot continuous rolling includes finishing rolling descaling roller tables, flying shears, racks, etc. Flying shear control is usually equipped with: a laser velocimeter to measure the speed of the strip head, a thermal detector for position detection, a controller, and an encoder for the speed measurement of the strip tail. Since the laser velocimeter is very expensive and the accuracy of the strip steel measurement speed is very critical, in order to ensure the shear control, the stability of the roller table speed before the flying shear plays an important role in the strip steel shear control. Because the original design speed of the roller table in this area is the actual value of the F0 speed multiplied by the back slip c...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the problem of high failure rate of the existing laser detection equipment, and to provide a method for controlling the shear speed of the head of hot-rolled strip steel, so as to ensure the shear control of the head of hot-rolled strip steel and realize the production of strip steel. stability control