Vibration Calculation Of Rolling Main Drive System Based On Finite Element Analysis Of Gear Stiffness

Rolling steel mill is the main equipment, it is the foundation of the development of industry. With the development of steel industry, Rolling mill production task constantly to be increased, the design method of traditional static learning theory has been not enough, The torsional vibration of the rolling mill affects not only the surface quality of the work piece, but also reduces the fatigue life of the transmission system, threat to the safety of the equipment directly.This paper is based on mill gears stem vibration theory and the kinetic theory, aims to research the drive system dynamics for a1580F2rolling mill. Establish shaft drive-rotor system dynamics model, turn the continuous system into discrete systems, and build a mathematical model with lagarangian method. Tooth time-varying stiffness is an important system parameter, so the mill main drive gear reducer’s time-varying mesh stiffness and clearance affecting on the system vibration is a main consideration. When calculate the time-varying stiffness of the tooth, according to mill gear parameters, using Pro/E software platforms, creating a parameterized three-dimensional tooth contact model, using ANSYS finite element analysis software to complete the contact analysis, we obtain the time-varying mesh stiffness of tooth. In the rolling mill gear reducer vibration calculation, establish two calculating model, one is with time-varying stiffness and clearance, and the other is with meshing stiffness, then Write mill main drive vibration calculation program by using MATLAB software. And then analyze the main drive vibration by this computational program.Finally, use relevant mathematical methods and MATLAB software to solve two kinds of mechanical models of dynamic torque response on in the bite process, and solve connection shaft torsional vibration torque and calculated torque magnification factor by changing the parameters on the different parameters of the mill spindle. By comparing the results of data analysis, and considering the time-varying stiffness and tooth clearance, the mill vibration characteristics changes significantly, torque amplification factor will also increases; and increasing the biting time will reduce the vibration torque, at the same time the error also affects the mill gear system vibration, the greater the error, the larger the system torque vibration will be. When considering the damping, the system will reduce the vibration amplitude continually and turn to stabilized in the end.