基于ANSYS的滚珠丝杠进给系统静动态特性分析

Analysis of Static and Dynamic Characteristic of Ball Screw Feeding System based on ANSYS

对一台数控车床滚珠丝杠进给系统的静、动态特性进行有限元分析,讨论了ANSYS中滚珠丝杠副结合面的建模方法。通过进给系统的死区误差和定位误差分析,校核了机床X向的定位精度和重复定位精度。并通过模态分析和谐响应分析,得到了机床进给系统固有频率和振动特性,为进给系统的合理使用和静、动态性能的提高提供了可靠的依据。

The ball screw feeding system＇ s static and dynamic characteristic of a CNC lathe is analyzed using the FEA method, the way of creating joint surface of the ball screw assembly has been discussed. The location accuracy and repeat location accuracy of the lathe＇ s X-direction are checked by analyzing feeding system＇ s dead band error and positioning error. And, by modal analysis and harmonic response analysis, the natural frequency and vibration mode of the feeding system are gotten, thus the reliable basis for the intelligent use and static and dynamic characteristic＇s in- creasing of the feeding system is provided.