超高速空气电主轴动态特性的有限元分析

Finite element analysis of dynamic characteristics of ultra high-speed aerostatic motorized spindle

空气静压电主轴是高速精密数控加工机床的关键部件之一,其动态特性是影响高速数控机床的加工质量和切削性能的重要因素。然而,当前超高速电主轴的转速能达到几十万转每分钟,使其对振动变形的问题尤为敏感和重要。因此,研究电主轴系统的动态特性,对于改善电主轴的高质量性、稳定性和可靠性都有着十分必要的意义。围绕模态分析和谐响应分析来完成对主轴系统实际运作过程中的仿真分析,从而可以具体的得到主轴系统在不同载荷激励下的动态响应大小,确定整个电主轴结构的完善性,验证电主轴系统的稳定性。

Aerostatic motorized spindle is one of the key components of high speed precision CNC machine tools,its dynamic characteristic is important factor affecting the machining quality and cutting performance of high speed CNC machine tools. The study of the dynamic characteristics of the motorized spindle system is of great significance for improving the high quali- ty, stability and reliability of the spindle. In this paper, through the modal analysis and the harmonious response analysis, the simulation of the actual operation process of the spindle system was completed. Thus, the dynamic response of spindle system under different load excitation could be obtained, and the stability of the motorized spindle system could be verified.