Variable coefficient looper control method

Abstract

The invention belongs to the field of control of hot continuous rolling strip steel rolling lines and particularly discloses a variable-coefficient loop control method. During rolling of a plurality of rolling mills, a control chip selects a loop torque adjuster coefficient according to temperatures and thicknesses of strip steels during rolling of rolling mills, and the loop torque adjuster coefficient Yn=Yn-1+C*Kp*((1+TA / TN)* delta YEn- delta YEn-1). A loop adjusting device adjusts the magnitude of the supporting force of a loop hydraulic device according to the loop torque adjuster coefficient transmitted by the control chip. By the aid of the method, the automatic control of a hydraulic loop during rolling of low-temperature thick-specification high-strength steels is guaranteed, the problem of oscillation of the loop between finishing rolling racks is solved, and the normal hot rolling production and the product quality are guaranteed.

Description

technical field [0001] The invention belongs to the field of hot strip steel rolling line control, in particular to a variable coefficient looper control method. Background technique [0002] With the development of high-strength steel varieties, when rolling low-temperature thick-gauge high-strength steel, due to the mismatch between the hydraulic looper adjustment control and the looper hydraulic system, the looper between the finishing stands oscillates, which also causes the pressing to follow the oscillation. The quality of the strip steel product is poor, and in serious cases, it will lead to direct scrap steel between the racks, which seriously affects the normal production of the rolling line and brings great economic losses. Contents of the invention [0003] The technical problem to be solved by the present invention is to ensure the automatic control of the hydraulic looper when rolling low-temperature thick-gauge high-strength steel, to solve the oscillation ph...

AI Technical Summary

Problems solved by technology

[0002] With the development of high-strength steel varieties, when rolling low-temperature thick-gauge high-strength steel, due to the mismatch between the hydraulic looper adjustment control and the looper hydraulic system, the looper between the finishing stands oscillates, which also causes the pressing to follow the oscillation. The quality of the strip steel products is poor, and in severe cases, it will lead to direct scrap steel between the racks, which seriously affects the normal production of the rolling line and brings great economic losses.