The Profile Control Of CSP And The Study On Roll Wear Model

The Profile of the hot rolling strip is one of the major quality parameters, and it is also the most concerned quality index. So the research of shape control is important from the view of both theory and production. This paper introduced the major strategy of shape control ,especially the CVC technology and its principle of shape control. The analysis of CVC work roll principle has been conducted and the mathematical model describing the relationship between shift position and roll crown has been obtained in the thesis.At present, a standard to evaluate the level of shape control has not been given in iron and steel companies. So it is hard to evaluate the control level of shape control in production. A method of executing strip shape standard by using measured strip shape quality data has been given in the paper to solve the difficulty of executing strip shape standard in iron and steel plants. On the basis of above idea, the software for appraising the strip shape in practice has been developed and applied in the CSP hot strip plant, Lianyuan Iron and steel company.The wear model for work rolls is the important part in shape control models. But so far there have had no accurate theory models to utilize in shape control. Various experience formulae to calculate the work roll wear are used in production. These experience formulae have their special deficiencies, which influence the prediction precision of work roll wear and control effectiveness of shape control. A theoretical calculating model of work roll wear for CVC rolls has been obtained on the basis of a lot of measured data in production plant. The calculating results are in good agreement with experiment data.