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Pressure double closed loop control method for roll gap position of cold-rolling mill

A double closed-loop control, cold rolling mill technology, applied in the field of cold-rolled strip rolling, can solve problems such as excessive adjustment of the inclination setting value and quality defects of the edge of the strip.

Active Publication Date: 2013-07-17
ANGANG STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Reasons for analysis: first, the adjustment of the set value of inclination is too large; second, there are defects in the edge quality of the strip

Method used

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  • Pressure double closed loop control method for roll gap position of cold-rolling mill
  • Pressure double closed loop control method for roll gap position of cold-rolling mill
  • Pressure double closed loop control method for roll gap position of cold-rolling mill

Examples

Experimental program
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Effect test

Embodiment

[0244] Example: According to the actual strip entrance thickness, exit thickness, reduction, deformation resistance, strip width, exit set tension, entrance set tension, work roll and back-up roll diameter, work roll and back-up roll crown Pre-calculate the relationship between the inclination and the rolling force difference on both sides, taking the rolling force difference as the independent variable and the inclination as the dependent variable, and use polynomial fitting to obtain the rolling force difference and inclination functional relationship

[0245] In application, according to the actual detection of rolling force difference ΔE on both sides DO , Calculate the inclination value of the roll through the above formula, and use it as the limit of setting the inclination value. When cracks appear in the strip steel, the shape of the raw material leads to tension difference on both sides or the accuracy of the detection element of the plate shape system decreases, r...

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Abstract

The invention relates to a pressure double closed loop control method for the roll gap position of a cold-rolling mill, relating to the field of the rolling of a cold-rolled steel strip. The method is suitable for a roll force control mode on the main pressure of a cold-rolling mill. The method comprises the following steps of: calculating an asymmetric rolling force of two sides after the cold-rolling mill is additionally titled; deducing a support roller and work roller cylinder support beam type elastic bending influence function which is suitable for the asymmetric rolling calculation according to a karnofsky energy theorem; effectively integrating a roll system deformation theory and a metal transverse flow theory; effectively improving a deformation compatibility equation in the conventional roll system deformation theory; and carrying out real-time on-line and self-adapting modification on a theoretical calculation model in consideration of the error of theoretical calculation. After the method disclosed by the invention is used, the happening of a tape-breaking accident caused by excessive tilt adjustment can be effectively restrained, and the unilateral waves can be obviously controlled.

Description

technical field [0001] The invention relates to the field of cold-rolled steel strip rolling, and is suitable for a rolling force control mode on the main pressure of a cold-rolling mill. The application of this technology can effectively suppress the occurrence of broken belt accidents caused by excessive tilt adjustment, and has a significant effect on the control of unilateral waves. Background technique [0002] Plate thickness accuracy and plate shape are two major quality indicators that determine the geometrical dimension accuracy of plate and strip. The control of plate thickness accuracy has become more and more perfect after years of development. However, due to the complex and changeable influencing factors, there are still many problems in the basic theory, detection technology and control technology that have not been fundamentally resolved. Up to now, the research on the shape control theory and control technology is still being continuously improved and devel...

Claims

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Application Information

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IPC IPC(8): B21B37/58
Inventor 刘宝权张岩王军生姜梦春王革新宋蕾侯永刚秦大伟宋君王勇
Owner ANGANG STEEL CO LTD
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