Method for controlling speed of hot-rolling thin-gauge loop compensation host machine through variable coefficient

Abstract

The invention belongs to the field of automatic control of the loops of strip-steel hot-rolling rolling lines and particularly relates to a method for controlling the speed of a hot-rolling thin-gauge loop compensation host machine through variable coefficient. The method comprises the following steps: when a computer detects that a strip-steel bite loop of the rear machine frame of two adjacent machine frames in a finishing mill group rises, the execution of the self-adaptive variable coefficient control over the speed of the loop compensation host machine is delayed for 1 to 2 seconds; a compensation value is calculated according to a formula. The method has the benefits as follows: the normal action of the loop is ensured; the problems of drifting, scrap steels and poor product quality, caused by the false looping of the strip-steel loop are avoided; the stable control over the moment of the thin-gauge strip-steel loop and the like is realized; the stable control over strip steels between machine frames is ensured; the downtime is reduced; the surface qualification rates of products are improved.

Description

technical field [0001] The invention belongs to the field of looper automatic control of a hot continuous rolling strip steel rolling line, in particular to a method for controlling the speed variable coefficient of a hot continuous rolling thin specification looper compensation main engine. Background technique [0002] Since the main transmission system of the hot continuous rolling and finishing unit has AC-DC transmission, and the hydraulic looper proportional servo system adopts DC transmission, the response speed of the main drive of the finishing rolling is faster than the adjustment speed of the looper, showing that the rolling thickness of the finishing rolling is less than 2.5 When the gauge is thinner than mm, when the looper adjusts the looper, due to the fast speed of the looper compensation host, there will be a false loop of the strip, that is, the actual torque of the strip looper is smaller than the given torque of the strip looper, resulting in deviation of ...

AI Technical Summary

Problems solved by technology

[0002] Since the main transmission system of the hot continuous rolling and finishing unit has AC-DC transmission, and the hydraulic looper proportional servo system adopts DC transmission, the response speed of the main drive of the finishing rolling is faster than the adjustment speed of the looper, showing that the rolling thickness of the finishing rolling is less than 2.5 When the gauge is thinner than mm, when the looper adjusts the looper, due to the fast speed of the looper compensation host, there will be a false loop of the strip, that is, the actual torque of the strip looper is smaller than the given torque of the strip looper, resulting in deviation of the strip, which is serious Sometimes it will lead to direct scrap steel between the racks, which will bring great economic losses

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