声发射监测切屑状态的可行性研究

金属切削过程中产生丰富的声发射。用声发射技术监测切屑状态是一个很有潜力的新方法。本文通过实验研究了车削时切屑状态和声发射信号间的相互关系，结果表明：1.声发射DC包络信号脉冲能准确反映断屑情况；2.声发射加权计数率波形和包络信号均值能反映切屑形状和异常切屑状态；3.不同类型切屑的形成过程具有不同的声发射信号波形。

AN INVESTIGATION ON THE FEASIBILITY OF MONITORING CHIP STATES USING ACOUSTIC EMISSION TECHNIQUE

An abundance of acoustic emission (AE) is emitted in metal cutting process. And it is a new technique of great potentialities for on-line monitoring chip states using AE signal analysis. In this paper, experiments on turning have been carried out in order to reveal the relationship between chip states and AE signals in metal cutting process. From these studies one can conclude that the pulses of AE envelope waveform (DC) indicate chip-breaking state accurately; chip forms and unusual chip state can actually be shown by the waveform of weighted AE count rate and DC signal averages, the formation of different chip form is carelated with the corresponding AE waveform.