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文采用时域的数字仿真方法,系统地计算了车削、铣削的稳定图,分析了机床不同结构模态参数匹配下稳定图的特点。对刀齿采用平均方位和瞬时方位两种假设,所计算出的铣削稳定图进行比较表明,其最低稳定边界相差很大,并且随结构模态参数不同而异。通过本文分析,目前应用的极限切削宽度公式,只适合于计算车削最低稳定边界,而不适用于铣削情况。对于计算和分析铣削稳定性和稳定图,考虑刀齿瞬时方位的数字仿真方法,是较适宜和有效的。
In this paper, we use the digital simulation method in the time domain to systematically calculate the turning and milling stable graphs and analyze the characteristics of the stable graphs matching the different structural modal parameters of the machine tool. Comparing the assumption of average azimuth and instantaneous azimuth with respect to the blade, the comparison of the calculated milling stability diagrams shows that the lowest stable boundary is very different and varies with the structural modal parameters. Through the analysis of this article, the current application of the formula of the ultimate cutting width, only suitable for the calculation of turning the lowest stable boundary, but not for milling. For the calculation and analysis of milling stability and stability diagram, consider the instantaneous orientation of the knife digital simulation method is more appropriate and effective.