锻压技术

间隙冲击导致联轴器叉头断裂的数值模拟及实验验证

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

作者：任学平何珍光孙百祎刘淮全

分类号：TH113；TG333

出版年,卷(期):页码：2019,44(1):113-117

摘要：

由于设计、安装以及磨损等因素导致中厚板轧机主传动系统存在不同间隙，在咬钢冲击或打滑条件下，各轴段在间隙内发生重复碰撞，造成振幅增加。针对某钢厂现役中厚板轧机联轴器叉头断裂事故，将轧机的主传动系统简化成4自由度非线性扭振模型，在MATLAB中建立轧机主传动系统的仿真模型，采用数值计算方法得到轧机在间隙冲击下各轴段的扭矩曲线以及对扭矩放大系数的影响，并通过采集连接轴的应变数据，得到应变曲线。研究结果给出了轧制过程中联轴器叉头断裂事故的原因之一，由间隙产生的冲击改变了系统的加载方式，轧辊咬入钢坯的速度越高，扭振响应越严重。

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.

基金项目：

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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