Improvement of the Control Systems for Electric and Hydraulic Drives of the Wide-Strip Hot-Rolling Mill

V.R. Khramshin, A.K. Kosmatov, R.Ya. Khramshin, A.G. Shubin

Abstract


Diversification of the strip gauges being produced at the existing hot-rolling mills predetermines the need for development and improvement of the automated electric drives and systems for automated control of the process parameters.  This task is especially crucial for the 2,000 and 2,500 mm wide-strip hot-rolling mills of OJSC Magnitogorsk Iron and Steel Works. It is relevant for the finishing train as well as for the continuous roughing sub-train which ultimately determine technical possibilities for gauge diversification and product quality improvement. The paper concerns major developments conducted by scientists of Magnitogorsk State Technical University in collaboration with specialists of OJSC Magnitogorsk Iron and Steel Works. It presents technical solutions providing power savings due to the reduction of the reactive power consumption without compensating devices. The paper gives information on the systems of the speed coordination in the strip grip mode due to the steady-state error compensation at the electric drives with the proportional speed controller. It considers the method and system of the automated gauge control of the advance strip section by means of the roll gap change during rolling. Due attention is paid to the systems coordinating speeds of the adjacent stands of the roughing continuous sub-train of the 2,000 mm mill.

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References


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DOI: http://dx.doi.org/10.24892/RIJEE/20150108

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