| The increase of rolling speed and the improvement of product quality requirementsmake the rolling mill main drive torsional vibration phenomenon from biting steel occurfrequently. Especially, under the condition of the slippage in roll caused by the openclearance, the impact of the gap may cause damage of the system. The research for the rollbite steel impact model and system with clearance to the influence of the rolling mill maindrive system was studied in this paper, providind more reference for the normal operationof equipment and optimizing the operation.This paper took Baosteel5000mm plate mill as the research object. The dynamicmodel was established. Through the modal analysis of the rolling mill main drive system,the rationality of the design of the rolling mill dynamics was verified, and the finalconclusion for this mill design basic met the optimal dynamic design principles.Based on the torsional vibration equation with six degrees of freedom, TheRunge-Kutta numerical method was adopted to the numerical simulation, and the axissection TAF with time-dependent were discussed, bite steel impact model for systemdynamic response and the influence of torque amplification factor were analyzed. Byanalyzing the simulation results, the quantitative analysis for the torque amplificationfactor and of the bit steel time were provided in both cases of considering clearance andwithout clearance.For three different forms of bite steel impact model, the TAF of stepload was biggest, and the damage to the equipment was biggest. On the contrary, the slopeload was relatively the most safe working conditions.Three different ways of loading for each axis of TAF had great influence by theresearch for the clearance of the rolling mill main drive system, especially the step loadingto slope and cold head load change was more obvious. In addition, the gap size wassensitive only to the clearance of the shaft, the axis away from gaps was less affected. |
PDF Full Text Request