Numerical analysis and process optimization for bending rolls'load in strip tension-leveling
As the key bearing structure of tension-leveler,the service life of the bending rolls is affected by the load and thus de-termines the operation cycle of tension-leveler.The load model is established and the optimization is carried out for the bending rolls'load of tension-leveler with two bending units and two leveling units.Firstly,the response surface for the bending rolls'load is built based on FEM calculation and core process parameters influence on the bending rolls'load is studied.Secondly,for the quality of strip,the multi-objective optimization model is established to balance the bending rolls'load,under the constraint of constant elongation.Finally,the non-dominated sorting genetic algorithm(NSGA-Ⅱ)is used to solve the multi-objective optimi-zation model,and the optimal process parameters combination is given to realize the synchronous control of the bending rolls'load,which is helpful to extend the stable operation cycle of the whole machine.
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