Chatter vibration is a major obstacle inachieveing increased machining performance. In thisresearch, a finite element model of chip formation in a 2Dmilling process is used to predict the occurrence of chattervibratio...Chatter vibration is a major obstacle inachieveing increased machining performance. In thisresearch, a finite element model of chip formation in a 2Dmilling process is used to predict the occurrence of chattervibrations, and to investigate the effects of variousmachining parameters on this phenomenon. The dynamicproperties of the machine tool at the tool tip are obtainedbased on experimental modal analysis, and are used in themodel as the cutter dynamics. The model allows for thenatural development of vibration as the result of the chip-tool engagement, and accounts for various phenomena thatoccur at the chip-tool interface ultimately leading tostable or unstable cutting. The model was used todemonstrate the effects of the machining parameters, suchas the axial depth of cut, radial immersion, and feed rate,on the occurrence of chatter. Additionally, the phenomenonof jumping out of the cut region could be observed in thismodel and its effect on the chatter process is demonstrated.The numerical model is verified based on comparisons withexperimental results.展开更多
文摘Chatter vibration is a major obstacle inachieveing increased machining performance. In thisresearch, a finite element model of chip formation in a 2Dmilling process is used to predict the occurrence of chattervibrations, and to investigate the effects of variousmachining parameters on this phenomenon. The dynamicproperties of the machine tool at the tool tip are obtainedbased on experimental modal analysis, and are used in themodel as the cutter dynamics. The model allows for thenatural development of vibration as the result of the chip-tool engagement, and accounts for various phenomena thatoccur at the chip-tool interface ultimately leading tostable or unstable cutting. The model was used todemonstrate the effects of the machining parameters, suchas the axial depth of cut, radial immersion, and feed rate,on the occurrence of chatter. Additionally, the phenomenonof jumping out of the cut region could be observed in thismodel and its effect on the chatter process is demonstrated.The numerical model is verified based on comparisons withexperimental results.
