Vibration Characteristic Analysis Of The Main Drive System Of4300Roling Mill

4300mm plate mill, taking a lot of Plate of moderate thicKNess production tasks, hasmade contributions to the development of Shouqin Metal Material Co. Ltd, since it wasput in operation. The plate mill, as a heavy-loading equipment, however, bears higher loadand impact during the rolling process, which leads to premature failure of components,such as the fracture of the cross shaft universal joint shaft and transition axis in drivesystem which impacts production and results in large economic losses. To master torquedistribution in the rolling process and to explore reason of joint shaft fracture, this paperstudies the dynamic characteristics of mill main drive system in theory and in experimentso as to make the right judgment on mill torque conditions and to provide basis fordevelopment of new products, exploration of equipment potential and guidance ofequipment maintenance.Main content of this research as follow:(1) Based on system dynamics theory, this paper establishes mechanical model of the4300main drive system and lists the dynamics equation to obtain the drive system naturalfrequency and the main vibration mode.(2) With finite element method used to simulate the Dynamic characteristics ofuniversal joint, the maximum equivalent stress of universal joint fork and cross axle andits distribution are obtained. Through field testing, this paper obtains the stress spectrumof universal joint fork and cross axle, and conducts life prediction of universal joint crossshaft.(3) With Adams software on the drive system dynamics simulation, this paper studiesthe change of torque amplification factor in bite steel process of drive system with gap. Itfollows the impact of single-gap, multi-gap and the size of the gap on the dynamiccharacteristics of the drive.(4) This paper conducts tracking test of multi-point torque for rolling mill main drivesystem, obtains the distribution of the maximum and average torque, torque magnificationin the production process, gives the spectral characteristics of torsional vibration, analyzes the reason of torsional vibration, evaluates the stress level of stress point and provides abasis for the finite element mechanics analysis of the spindle of the cross.This paper analyzes and calculates and conduct experimental tests of4300mill maindrive system from a dynamic point of view, which can provide a theoretical basis for thedynamic design of mill drive system and also provide technical reference for themaintenance department.