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    The correlation dimension characteristics of acoustic emission for single diamond cutting oxygen free copper

    WU Haiyong;College of Mechanical Engineering, Zhangzhou Institute of Technology;Institute of Manufacturing Engineering, Huaqiao University;Post-Doctoral Research Center, Fujian Longxi Bearing Group Co., Ltd.;  
    Acoustic emission(AE) technology can be employed to monitor and evaluate the cutting process characteristics of oxygen-free copper. In this paper, AE technology was used to monitor single diamond abrasive grit for rotary cutting of oxygen-free copper. The G-P algorithm was used to reconstruct the phase space of AE time domain signals. The autocorrelation function method was used to determine the time delay of phase space, and the double logarithmic curve of phase space was calculated to obtain the correlation dimension of AE signal with different cutting parameters. The results show that the cutting speed and feed rate have little effect on the AE signals, and the cutting depth has a positive effect on the amplitude of AE signals. The double logarithmic curve of AE signals shows a phased increase trend and gradually converges to saturation. With the increase of the embedding dimension, the correlation dimension of AE signal shows a rapid decline and then stabilizes. The AE signals of diamond cut oxygen-free copper have chaotic motion variation characteristics.With small embedding dimension, the correlation dimension has a linear negative effect relationship with the cutting depth and cutting speed, and a linear positive effect relationship with the feed speed. This research provides a theoretical reference for the machining of oxygen free copper.
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