Processing Stability Analysis on Rotary Ultrasonic Machining of Thin-Walled Plate of SiCp/Al Composites

Ming Wang, Dan Guo, Chengfu Ding


SiCp/Al composites have outstanding properties and it can be used to manufacture thin-walled workpiece. However, this material is hard to machine due to the reinforced particles existing in aluminium substrate. Rotary ultrasonic machining (RUM) is fit for machining SiCp/Al composites due to its outstanding processing features. Chatter is appeared frequently in machining thin-walled workpiece result from its poor manufacturability and it is very necessary to retrain chatter to guarantee processing quality. Based on analysis of a dynamic stability model for vibration analysis, the processing stability of a thin-walled plate of SiCp/Al composites reinforced with 45% volume fraction was analyzed and a stability lobe diagram was drawn. The experimental results show that the chatter could be prevented effectively using this method in machining process of thinwalled workpiece machined by RUM.


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