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Automatic gauge control (AGC) method for rolling mill

A control method and rolling mill technology, applied in the direction of rolling force/roll gap control, etc., to achieve the effect of enhancing reliability, improving effect and control accuracy, and eliminating time lag

Inactive Publication Date: 2011-08-31
WISDRI WUHAN AUTOMATION
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The AGC feedback control of the rolling mill has the characteristics of time lag, and the thickness deviation of the export strip cannot be completely eliminated by relying on the feedback AGC

Method used

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  • Automatic gauge control (AGC) method for rolling mill
  • Automatic gauge control (AGC) method for rolling mill
  • Automatic gauge control (AGC) method for rolling mill

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Embodiment Construction

[0030] The invention relates to a method for AGC feedforward, second flow and feedback control of a rolling mill. The common point of these three control methods is to achieve the purpose of controlling the exit thickness of the rolling mill by changing the set value of the roll gap that the rolling mill presses down. Among them, the feedforward control and the second flow control both control the outlet thickness by sampling and measuring the inlet thickness and tracking it to the position of the roll gap of the rolling mill, and then modify the setting value of the pressed roll gap according to the algorithm; the feedback control requires the outlet thickness gauge The measured value is traced back to the position of the rolling mill, and then the value of the rolled gap is corrected according to the feedback control algorithm to control the exit thickness of the strip.

[0031] The present invention combines the above three control methods, and achieves the purpose of high-...

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Abstract

The invention provides an automatic gauge control (AGC) method for a rolling mill, which comprises AGC. The AGC comprises the following steps of: sampling by using detection devices; transmitting a signal to a rapid analog quantity IO, a rapid digital quantity IO, a relative incremental coder and an absolute incremental coder; converting the signal into a digital signal; transmitting the digital signal through a VME bus and saving the digital signal in a dynamic memory; performing processing and calculation through a high-performance control device to generate a control signal; and outputtingthe control signal and a control value to a hydraulic performing device by passing through the VME bus, the rapid analog quantity IO and the rapid digital quantity IO in turn to fulfill the aim of hydraulic AGC of the rolling mill. An AGC feedforward control device, a flow rate per second control device and a feedback control device of the rolling mill are combined to provide a set of high-precision data tracking solution for input and output signals, so the aim of precisely controlling the thickness of output strip steel of the rolling mill is fulfilled.

Description

technical field [0001] The invention relates to the field of electric automatic control, in particular to a rolling mill AGC control system. Background technique [0002] Rolling mill AGC (Automatic Gauge Control, thickness automatic control) refers to the method of automatic control of the roll gap in order to control the exit thickness of the rolling mill within the set allowable range during the hot rolling or cold rolling process. Therefore, the rolling mill AGC can be divided into hot rolling mill AGC control and cold rolling mill AGC control according to the process. Rolling mill AGC control includes feedforward, feedback and second flow control methods, as well as compensation controls such as efficiency, oil film, and eccentricity. [0003] Among them, the AGC feedforward control is to adjust the roll gap value of the rolling mill according to the change of the entrance strip thickness (disturbance) to eliminate the influence of the disturbance on the exit thicknes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/62
Inventor 王胜勇卢家斌张绍新李四川
Owner WISDRI WUHAN AUTOMATION
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