Elastic-Plastic Fem Simulation On Plate Rolling Process

Plate rolling is one of the most important metal forming processes. In rolling,non-uniform spread results in non-rectangular plates,causing yield loss. So by the purpose of predicting plan view pattern, the one-pass rolling process of 3200mm heavy and plate mill was studied.In this study, first detailed summary of the development of heavy and plate mill equipment in and abroad and the status of plate rolling process. introduces a variety of analytical methods of the process of rolling, on the basis of analyzing their advantages and disadvantages, the elastic-plastic finite element method is choosed and the fundamental theory of elastic-plastic finite element method (FEM) is given.The next in this dissertation, to get the thermal crown of rolls under thermal equilibrium state, the Elastic-Plastic FEM was used to establish the model of four-high mill thermal crown by MSC.Marc software, Obtained the stability of the rolling roll thermal crown. Used finite element analysis software to construct 3-D FEM simulation solid. In the model, the thermal crown of work roll, the elastic-plastic deformation of the strip are taken into account.Then based on elastic-plastic FEM model, the effect of rolling condition on the rolls system deformation and plan view pattern had been analyzed and the qualitative rules of plan view pattern after rolling were obtained.Finally combined with the theoretical derivation and the large quantity computational cases by FEM on the production conditions of plate rolling, the prediction model of plan view pattern was obtained. Through the analysis of the computational data from FEM, the formula of the plan view curves of plate after single pass was regressed with polynomial expression. In this formula, the arithmetic product of contact length and reduction ratio was one variable, the length or width coordinate was another. This research had an important reference value for the theoretical and practical industry guidance of in-depth studying plan view pattern control and key technologies research and development...