Abstract
The problems of limiting dynamic loads on electromechanical systems of the continuous train of universal rolling stands of the wide strip hot rolling mill require intensive research using methods of mathematical modeling. The functional scheme of the automatic no pull control system of OJSC “Iron and Steel Works” rolling mill 2000 was examined. It was pointed out, that it does not meet the increasing requirements to the accuracy of the interstand tension control. The structural diagram of the mathematical model of electromechanical systems of horizontal rolls in the continuous train is given. The authors refer to the developed mathematical model of interrelated electromechanical systems of vertical and horizontal rolls of a universal rolling stand. They describe the results of transient processes modeling per rolling cycle for the current algorithms of electric drives control. The research confirmed the determining influence of the mutual mismatch of the strip exit speed from the previous (vertical or horizontal) stand and the roll rotating speed of the next stand on the tension or backing in the interstand space. The developed method of speed coordination for electric drives of continuous train is described. The results of research work carried out by means of the developed mathematical models are given. It is concluded that the offered control method of the rolling process is capable of compensating interstand tension thanks to the more accurate roll speed matching before the strip grip.
Keywords
Wide strip rolling mill, roughing continuous train, universal rolling stand, interstand tension, electric drive, mathematical model, structure, method of speed matching, research.
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