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조문호(M. H. Jo),김혁(H. Kim),구준영(J. Y. Koo),이종환(J. H. Lee),김정석(J. S. Kim) 한국생산제조학회 2014 한국생산제조학회지 Vol.23 No.4
This paper proposes a method to predict chatter vibration generated in milling processes and to enhance machining quality and surface finish. Chatter vibration is a common problem in the milling of thin walls and floors. It causes a poor surface finish, or even marks, to appear on the final machined surface. Therefore, an effective method is necessary to predict chatter vibration in machine tools. In this investigation, chatter vibration is measured by an accelerometer, microphone, and Acoustic Emission (AE) sensor in a machining operation. Based on the results of the experiment, a microphone can be applied for the prediction of chatter vibration in milling processes.
채터진동 검출 및 회피를 위한 가상 동적 가공시스템 구축
김혁(H. Kim),조문호(M. H. Jo),구준영(J. Y. Koo),이종환(J. H. Lee),김정석(J. S. Kim) 한국생산제조학회 2014 한국생산제조학회지 Vol.23 No.3
This study presents a chatter vibration avoidance program for the milling process. Chatter vibration has a negative effect on workpieces and spindle-tools. When chatter vibration occurs, the cutting tool is loaded dynamically, a chatter pattern is generated on the workpiece, and the tool life is reduced. The developed program is composed of various modules such as an FFT analyzer, an impact test analyzer, a chatter vibration indicator, and a spindle speed recommender. The proposed program is verified using an AISI D2 cutting experiment in milling process. The effect of chatter vibration on the machining condition can be simulated by the suggested method, and successfully exploited to avoid chatter vibration.