Process Simulation & Study On Process Parameter Optimization For The Tension Leveling With The Elastic-plastic Theory

With the rapid development of aerospace, national defense, household appliances, can manufacturing industry and so on, especially the high speed development of China's auto industry, people strive for shape precision of cold-rolled sheet more and more strict. It is extremely important to control and improve the flatness, which is the index to assess shape precision of metal strip. The continuous tension leveling can effectively remove various shape defects, improve the strip quality, and achieve flatness requirement. Although the tension leveler has very broad application, there is no rigorous, systematic theoretical basis and accurate mathematical models about how to make the process parameter adapt to the wave of incoming strip and make the appropriate adjustment. Therefore, study on tension leveling and its process parameter become an urgent demand.First of all, this paper analyzes the finite element theory for tension leveling with the metal elastic-plastic theory.Secondly, with the elastic-plastic theory, considering the material nonlinearity, geometry nonlinearity, nonlinear boundary condition, Bauschinger effect, computation time, and simulation accuracy and so on, this paper use linear reduced integrated element and build the 2-D finite element analysis model with ABAQUS.Finally, based on the model, this paper obtains the strain and stress cloud graph, state of defect after tension leveling, comparison one with two straightening roller by analyzing the results. These studies provide scientific references for plan and optimization of process parameter. The results of this paper have been applied preliminarily in some projects of one steel design institute.