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DETECTION OF CHATTER AND PREDICTION OF STABLE CUTTING ZONES IN HIGH-SPEED MILLING
LIU Anmin1 PENG Cheng1
LIU Jizhao1 GUO Xuee1 KRUTH J P 2
VANHERCK P 2
(1. Institute of Modern Manufacturing Technology, Hunan Institute of Technology, Hengyang 421002;
2. Faculty of Engineering, K.U. Leuven,
Leunen 3001, Belgium
)
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Abstract: A method of detecting chatter in high-speed milling by means of measuring the noise from the cutting process is given. First the noise from the environment and then the cutting process are measured respectively. Theoretical analysis and testing results show that if the value of the dominant harmonic frequency of the noise from cutting process is close to that of one of the dominant harmonic frequencies of the noise from the environment, or is integer times that of the tooth passing frequency,
no chatter occurs, otherwise there is chatter. The mathematical models
for the system’s structure and milling process are established. Based on
the chatter frequencies detected, the system’s natural frequencies, damping ratios, and process parameters can be worked out from the models. The stability lobes can thus be calculated. It is verified by tests that this method can well predict the stable cutting zones in high-speed milling.
Key words: High-speed milling Chatter
Noise measurement Stable cutting zones
CLC No: TH162
欧共体发展基金、湖南省科技厅科技创新基金(03SSY4055)和湖南省经委科技重点基金([2004]181)资助项目. Received 20060119, received in revised form 20060817
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