Study On Temperature Field And Thermal Profile Of Work Roll In Sheet And Strip Rolling

The research of work roll thermal profile,as one of the important area of strip shape control theory,is the vulnerable spots because of both the complicated boundary condition and numerous effect factors.So the reseach of thermal profile has the important value of the theory and practice.In this paper , the dynamic forming process mechanism of thermal profile of work roll has been studied systematically , and the simulation model of temperature field and thermal crown has been developed during rolling sheet and strip. At the same time,the heat transfer equation and the boundary conditions, which is needed for temperature field simulation, has been determined. The relation and features of heat flow into and out of rolls are analyzed in detail , simplified theory and method of heat flow calculation are discussed. The formula of spray, temperature rise caused by plastic deformation, roll bite heat transfer coefficient has been summarized .The work roll' thermal profile of 70MN stiff mill has been calculated with FEA,the temperature field and Variety of thermal crown and the thermal profile in work condition has been predicted . The Elastic deformation of roll system has been calculated , and the finally profile of roll has been obtained .Current FEA software is precise,but the modeling and debugging need professional man,further more FEA need more time.So a special software is made for 70MN stiff mill in Matlab language . In this software the finite difference method,influence function method and Object-brientated technology has been used . The software can be used easily , and can be expanded .The result of the software contrast with the result of FEA , proving that the precision of the software is high enough for engineering.