Finite Element Analysis On The Main Transmission System Of R2 Mill

Rolling mill is the most important equipment on the rolling line, and the main transmission system is the nucleal components of the rolling mill.As the increased demand on the rolled product, and the improvement requirement of the product quality, the trend that rolling mill equipment become more large, high-speed, roboticized, and high-accuracy is more and more manifest, the higher carrying capacity and reliability of the main transmission system is required.Because of the restriction of the working condition in the locale, the stress test on the dangerous place of the parts, which make up of the main transmission system, can't be carried out usually, to obtain the stress value of it, FEA method must be taken.Assembly of the main transmission system is constructed by using contact analysis technique and node coupling technique. The result analyzed by FEA method can be used to guide submodeling.On the basis of analysis on the coarse model, submodel of the main shaft is created. The failure cause of main shaft is found, by analyzing the calculating result of the submodel.Improvement project that the chamfer of the transmission shaft shoulder should be increased is prompted, an idea is put that to ameliorate the stress state of the chamfer of the transmission shaft shoulder, the balance coefficient of spindle equilibrator must be chosen reasonably.Submodel of the universal joint on the working side is constructed too, on the basis of analysis on the coarse model. After analyzing the submodel by FEA method, the dangerous place of the universal yoke has been found, which is located on the transition arc of the scaleboard slot and escape. The effect of clearance between the flat head and scaleboard to the strength of universal yoke is discussed, Improvement project is prompted which can ameliorate the stress concentration of the universal yoke by changing the structure of the scaleboard reasonably.The improvement project such as reducing the balance coefficient reasonably and increasing the chamfer of the transmission shaft shoulder has been adopted by the continuous hot rolling mill and has achieved good result.