교정공정의 FEM 해석을 통한 형상 개선 및 한계

In order to remove the shape defect of plate, the levelling process is import in the online plate rolling process. In the levelling process, the process condition is related with the performance of leveller to improve the flatness of plate. In this paper, we carried out the simulation the levelling process with various roll gap to fine out the best condition. However, there is the limitation of levelling process to remove the shape imperfections of plate. Due to the arrangement of work roll of leveller, the plastic deformation cannot be occurred from the end of plate to the distance with the half length of work roll pitch. In the FEM analysis, It is to almost impossible to describe the initial condition of plate before levelling. So, the accuracy of the FEM analysis for the levelling could be poor.