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论文类型：期刊论文

发表时间：2016-02-01

发表刊物：INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY

收录刊物：SCIE、EI

卷号：82

期号：9-12

页面范围：2123-2136

ISSN号：0268-3768

关键字：Chatter; Helix angle effect; Thin-wall milling; 3D stability lobe

摘要：Chatter is a very detrimental phenomenon occurring in milling process especially in thin-wall milling, which has been a limitation to achieve high productivity and good surface quality. The prediction of milling stability for chatter avoidance plays a key role in high performance milling. However, compared with the case of milling a part with a flexible cutter, the stability analysis and experimental validation for thin-wall milling are seldom provided. In this paper, an approach to obtaining the 3D stability lobe in thin-wall milling is proposed considering both the helix angle effect of cutter and the dynamic behavior of thin-walled part. A systematic cutting force model, which is capable of incorporating the helix angle effect and run-out effect of cutter, is first built. After the effective stiffness of the thin-walled part along the entire tool position is acquired by combining FEM with an impact experiment, the model of dynamic milling system with respect to the mode shape of thin-walled part is then developed. Based on the model, an extended high-order time domain method is subsequently utilized to generate the 3D stability lobe diagram considering helix angle effect. Finally, the proposed method is validated by the results of dedicated experiments.