HC六辊冷轧机垂扭耦合振动分析

Analysis of vertical torsional coupled vibration of six-roll cold rolling mill HC

轧机系统异常耦合振动是影响轧件质量的重要因素。通过对某钢厂2180型六辊冷轧机的现场测试及分析发现工作辊的异常振动会传递到主传动系统中,造成齿轮箱等部件的故障,万向接轴并未有效隔断振动的传递。根据实际参数建立了包含主传动系统扭转振动和工作辊垂直振动的轧机耦合振动数学模型,并求解了模型的响应特性。同时,通过仿真分析发现了轧机垂扭耦合振动的真实性。定量分析发现系统发生耦合振动时工作辊扭转角及振动位移变化相对较大,扭转振动对垂直振动的影响较为明显。此方法为抑制轧机系统振动、减少设备故障提供了理论依据。

The abnormal vibration of rolling mill system is an important factor affecting the quality of workpiece. Through the field test and analysis of the six-roll cold rolling mill 2180 in a steel mill,the abnormal vibration of the work roll was transmitted to the main transmission system,which results in the failure of the gear box and other parts. However,the universal joint shaft did not effectively cut off vibration transmission. Based on the actual parameters,a mathematical model of the coupled vibration of the rolling mill including torsional vibration of main transmission system and vertical vibration of work roll was established,and the response characteristics of the system were solved. At the same time,the existence of vertical torsional coupled vibration of rolling mill was found by simulation analysis. Furthermore,quantitative analysis shows that the changes of work roll torsion angle and vibration displacement are relatively large during coupling vibration of the system,and the torsional vibration effects on the vertical vibration are more obvious. This method provides a theoretical reference for suppressing the vibration of rolling mill system and reducing equipment failure.