关键词: 多轴机床, 全微分, 任意结构, 通用后置, 故障诊断, 滚动轴承, 平方包络谱相关峭度, 最优共振解调

Abstract: Due to existing post-processing algorithm, which is only suitable for a specific type of multi-axis NC machine tool, a generalized method that fits arbitrary configuration is presented. It derives a general kinematic model from multi-body kinematics, and describes the spatial relationship between adjacent CL-data as total differential. The complicated reverse kinematics problem is transformed into solving linear equations. The initial machine control data is solved with the combination of numerical method and total differential method to ensure solving accuracy of subsequent CL-data. In comparison with conventional methods, experiments on a specific machine tool show that the total differential method has attributes of being better generalized, more accurate, and with faster computing speed.

Key words: Arbitrary configuration, General post-processing, Multi-axis machine tools, Total differential, Fault diagnosis, Resonant band demodulation, Rolling bearing, Squared envelope spectral correlated kurtosis