Solution and Analysis of Chatter Stability for End Milling in the Time-domain

In this paper, the instantaneous undeformed chip thickness is modeled to include the dynamic modulation caused by the tool vibra- tion while the dynamic regenerative effects are taken into account. The numerical method is used to solve the differential equations gov- erning the dynamics of the milling system. Several chatter detection criteria are applied synthetically to the simulated signals and the stability diagram is obtained in time-domain. The simulation results in time-domain show a good agreement with the analytical predic- tion, which is validated by the cutting experiments. By simulating the chatter stability lobes in the time-domain and analyzing the influ- ences of different spindle speeds on the vibration amplitudes of the tool under a fixed chip-load condition, conclusions could be drawn as follows: In rough milling, higher machining efficiency can be achieved by selecting a spindle speed corresponding to the axial depth of cut in accordance with the simulated chatter stability lobes, and in finish milling, lower surface roughness can be achieved by selecting a spindle speed well beyond the resonant frequency of machining system.

作 者： Li Zhongqun Liu Qiang   作者單位： Li Zhongqun(School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100083,China;School of Metallurgy, Hunan University of Technology, Zhuzhou 412000, China)

Liu Qiang(School of Metallurgy, Hunan University of Technology, Zhuzhou 412000, China) 

刊 名： 中國航空學報（英文版）  ISTIC 英文刊名： CHINESE JOURNAL OF AERONAUTICS  年，卷(期)： 2008 21(2)  分類號： V2  關鍵詞： high-speed milling   chatter stability lobe   dynamic cutting force   time-domain simulation   cutting parameter optimization  

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