基于ANSYS Workbench的电主轴热误差预测

Thermal Error Prediction of Motorized Spindle Based on ANSYS Workbench

摘要: 针对电主轴受热变形影响加工精度的问题，本文先运用Solidworks软件对电主轴进行几何建模，然后通过有限元分析软件ANSYS Workbench对电主轴进行瞬态热–结构耦合分析，从而预测出电主轴热误差随时间变化的趋势，最后以实验室的TC-E650型数控雕铣机为研究对象验证仿真结果。实验结果表明：电主轴在运行的前1500 s内热误差变化幅度大，短时间内迅速增长到40 μm，而后缓慢增长，在运行约4500 s时达到热稳态，主轴末端最大轴向热误差为52 μm，实验结果有效验证了电主轴热误差的有限元瞬态预测模型的精度，为电主轴的热平衡设计及热误差的补偿提供了参考。

Abstract: In order to solve the problem that the thermal deformation of motorized spindle affects the machining accuracy, this paper first uses Solidworks software for geometric modeling of motorized spindle, and then carries out transient thermal-structure coupling analysis of motorized spindle by ANSYS Workbench finite element analysis software, so as to predict the trend of thermal error of motorized spindle with time change. Finally, the tC-E650 CNC engraving and milling machine in the laboratory is taken as the research object to verify the simulation results. The experimental results show that: The thermal error of the motorized spindle changes greatly in the first 1500 s of operation, rapidly increases to 40 μm in a short time, then slowly increases, and reaches thermal steady state at about 4500 s. The maximum axial thermal error of the motorized spindle is 52 μm. The experimental results effectively verify the accuracy of the finite element transient prediction model of thermal error of the motorized spindle. It provides reference for thermal balance design and thermal error compensation of motorized spindle.