Stability Analysis of Milling on Parallel Machine Tools

From the analysis of static and dynamic characteristics of parallel machine tools, it can be found that the stiffness and vibration response of machine tools in different positions are obvious, which will inevitably cause the phenomenon of instability in the milling process, so it is especially necessary to study the milling stability of parallel machine tools. First of all, this paper takes 6SPS parallel machine tool as the actual operation object, establishes the milling vibration model of its tool, and determines the key elements affecting the milling vibration model. The vibration signal of the parallel machine tool is collected through experiments, and the milling stability of the parallel machine tool is reflected by the method of expressing the vibration intensity through the root mean square of the vibration signal. The influence of milling parameters on milling stability under different positions is analyzed, and the spectral analysis method is adopted to identify the chattering phenomenon in the milling process. Finally, the weights of each milling parameter on vibration were determined by gray correlation analysis.