电主轴热补偿及轴承故障检测在热辐射测温方面的研究

Measuring Thermal Radiation Temperature of Motorized Spindle's Thermal Compensation and Bearing Fault Diagnosis

针对电主轴轴体的热变形以及重要零部件轴承在加工中心上的常见故障,提出基于收集电主轴温度变化的热误差实时补偿计算方法与轴承常见故障的诊断方法。热误差补偿方法可以通过对轴体上测温点数据的处理对电主轴单元进行实时的热误差补偿提高加工精度。故障诊断方法是对不同的温度节点设置不同的阈值,阈值对应着电主轴单元内部某些重要零件的故障特征,当节点温度变化超出阈值即进行报警以诊断具体零件的故障。促进了电主轴的智能化进程,为接下来的研究打下基础。

To reduce the thermal deformation of a motorized spindle's shaft body and the common faults of important parts such as bearing in the processing center,a real-time thermal error compensation calculation method based on collecting the temperature change of the motorized spindle and the bearing's common fault diagnosis method were proposed.The thermal error compensation calculation method can improve the machining accuracy of the motorized spindle unit through processing the temperature measurement point data of the shaft body.The fault diagnosis method is used to set different thresholds for different temperature nodes.The threshold corresponds to the fault characteristics of a certain important part inside the motorized spindle unit.When the change in a temperature node exceeds the threshold,the alarm is given to diagnose the faults of a particular part.