Structure Design Check And Optimization Of Large Cold Rolling Mill

The pipe mill is currently the main seamless pipe manufacturing equipment, it can improve both the dimensional precess and the quality while working. Mill frame is the basic component of the mill and bears all the forging force. The structure of one large cold rolling mill is designed and checked based on the analysis of research status and progress, and analysis of frame optimization is also taken.The 3D model of LG730 large tube rolling mill is built in the three dimensional modeling software Solid Works. The finite element simulation of rolling mill is taken with analysis software MSC.Marc. the deformation and stress distribution is got with the maximize rolling force of 2000 t, while the strength and stiffness of the mill is checked. the influence law of deformation and stress distribution is analysised with different pre-loading load. To determine the fessibility of analysisi results, the mesh refinement is studied to get how grid number influence the result of finite element analysis.How stiffness and strength of the frame change with different pillar area, width and thickness is studied, on the basis of which the optimized design is performed to determine the reasonable frame pillar arear, the width and the thickness values. Structure of frame dangerous position is optimized and compared with the original one on stress distribution to get the reasonable design of dangerous position.Optimization design scheme is put forward to reduce weight of the frame, and to determine the feasibility and effectiveness of the optimization, influence of the scheme on strength and stiffness of the system is analysised. The scheme which achieve weight loss without reducing machine stiffness and strength is chosen.Finally, analysis of the frame fatigue life using the MSC.fatigue software is taken to predict life of the frame with knowledge of fatigue analysis theory.