Control method of actual speed for cutting tail end of band steel by flying shear of 2250-mm rolling mill

Abstract

The invention provides a control method of an actual speed for cutting a tail end of band steel by a flying shear of a 2250-mm rolling mill and belongs to a control technology of cutting the tail end of the hot-rolled band steel by the flying shear in a metallurgy industry. According to the control method, two metal hot detection devices arranged in front of the flying shear are included. The control method is characterized in that a laser speed measuring instrument is arranged between the two metal hot detection devices; the actual speed V of the band steel is equal to V1*Vlaser / V2+VT, wherein V1 is an actual speed of F1 when the band steel leaves away from the laser speed measuring instrument and VT is equal to -0.02 to 0.022; Vlaser is a band steel speed detected by the laser speed measuring instrument when the band steel leaves away from the laser speed measuring instrument; and V2 is an actual speed of the frame F1 when the band steel leaves away from the metal hot detection device on the rear side. With the adoption of the control method provided by the invention, the shearing stability of the flying shear is improved, the fault rate is obviously reduced and good benefits are obtained.

Description

technical field [0001] The invention belongs to the technical field of flying shear tail control of hot-rolled strip steel in metallurgical enterprises. Background technique [0002] Since the 2250mm production line of TISCO's hot rolling mill was put into production, the flying shear loss rate has been above 0.65%. [0003] In the existing fly-shear tail control, before the fly-shear tail, the speed of the strip adopts the speed of the pinch roller under the descaling box. Due to the large fluctuation of this speed, the actual shear length is very large at the fly-shear tail. unstable. Due to the unstable length of the flying shear tail, it often leads to failure and shutdown, which affects the production efficiency and the economic benefits of the enterprise have suffered a great loss. Contents of the invention [0004] The purpose of the invention is to not only ensure the amount of cutting loss, but also avoid breakdown shutdown. [0005] Technical scheme of the pr...

AI Technical Summary

Problems solved by technology

Due to the unstable length of the flying shear tail, it often leads to failure and shutdown, which affects production efficiency and the economic benefits of the enterprise have suffered a great loss