Transactions of Materials and Heat Treatment

Title：Numerical simulation and experimental verification on fracture of coupling fork head caused by gap impact

Authors： Ren Xueping He Zhenguang Sun Baiyi Liu Huaiquan

Unit： Inner Mongolia University of Science and Technology Shandong Transport Vocational College

KeyWords： plate mill coupling fork head fracture gap impact MATLAB

ClassificationCode：TH113；TG333

year,vol(issue):pagenumber：2019,44(1):113-117

Abstract：

The main drive system of plate mill has different clearances due to some factors of design, installation and wear, the repeated collisions occurs in the gaps under the condition of biting steel impact or slipping for each shaft section, and the amplitude is increased. For the fracture accident of coupling fork head of the existing plate mill in a steel mill, the main drive system of rolling mill was simplified into a four-degree-of-freedom nonlinear torsional vibration model, and a simulation model of the main drive system of rolling mill was established by MATLAB. Then, the torque curve of each shaft section under the gap impact and the influence on the torque amplification factor were obtained by the numerical calculation method for the rolling mill, and the strain curve was obtained by collecting the strain data of coupling shaft. The result shows that one of the reasons for the fracture accident of coupling fork head during the rolling process is that the impact generated by the gap changes the loading mode of system, and the higher the speed of roller biting into billet is, the more severe the torsional vibration response is.

Funds：

内蒙古自治区高等学校科学研究项目（NJZY16154）

任学平（1963-），男，博士，教授，E-mail： rxp@imust.cn；通讯作者：何珍光（1994-），男，硕士研究生，E-mail：zhguhe@126.com

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