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http://dx.doi.org/10.5050/KSNVN.2007.17.6.507

An Investigation of Acoustic Signal Characteristics in Turning of Aluminum  

Kim, Yong-Yun (충북대학교 기계공학부)
Lee, Chang-Hee (충북대학교 대학원 정밀기계공학과)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.17, no.6, 2007 , pp. 507-514 More about this Journal
Abstract
This paper reports on the research which investigates acoustic signals acquired in turning with rough and finish simultaneously. The material is aluminum thin pipe. Two acousto-ultrasonic sensors were set on the finish and the rough bite of the CNC machine. It was first evaluated that one source was affected by the other. It was found that two signals were little affected each other, and that the acoustic signal from the finish bite was more related to the surface defects. Signals from the finish bite only were then analyzed in order to observe several types of surface defects. Second the fundamental experiments were accomplished to study the effects of machine vibration and material state. The signal characteristics due to surface defects were studied from the collected acoustic signals. The analysis was based on real time data, root mean squared average and frequency spectrum by fast fourier transform. As a result, the acoustic signals were made effects by machine condition, material structure. The acoustic signal from the finish bite was closely correlated with surface quality. Two types surface micro defects were then evaluated by the signal characteristics.
Keywords
Acoustic Signal; Vibration; Turning Process; Root Mean Square; Frequency Spectrum; Fast Fourier Transform; Bite Chattering;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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