Abstract: To solve the division problem of spindle system sub-structure and to improve the accuracy of each sub-structure's modeling in the frequency response function prediction of the tool tip point of spindle system,an equivalent modeling of the chuck in the spindle system based on the equal moment method of inertia was proposed,and the tooth segments and transition sections of the milling cutter was modeled accurately based on the method of equal mean moment of inertia.The VMC850E spindle system was used as the research object,and the equivalent model of spindle system holder-chuck-tool interface was established by Receptance Coupling Substructure Analysis (RCSA) method.The cuckoo search algorithm was used to determine the dynamic parameters of holder-chuck and chuck-tool two joint surfaces with the minimum error between the experimental value and the theoretical value of the frequency response function of tool tip point.The experimental results showed that the error between the predicted and measured third-order natural frequencies was within 1.8%,and the method was feasible and effective.

Key words: spindle system, chuck, milling cutter, precision modeling, sensitivity analysis, parameter identification

摘要：

关键词: 主轴系统, 夹头, 铣刀, 精确建模, 灵敏度分析, 参数辨识