工具壽命을 判定하기 위한 Acoustic Emission(AE) 검출방법의 활용성 연구 = The Study of an Application of Acoustic Emission(AE) Measurements to Sensing of Tool Life

다국어 초록 (Multilingual Abstract)

Acoustic Emission (AE) is ued to detect the cutting tool failure in the automated machining system, and to detect the micro-scopic processes of the material deformation and failure during the up-set forging.
AS the result, we got the following conclusions;
1. It was observed that amplitude level of AE signal was affected by cutting velocity only, and amplitude level of AE signal was directly proportional to flank wear width and the increasing rate was velated to cutting velocity. So, the relation between amplitude level of AE signal and tool life was represented as follow, ?? where, n=0.35, ??
2.?? is not much affected by feed rate, but drop 10-15% of it's value by lubricating.
3. Also in the plastic deformation on the same forming ratio, the plastic tensile instability point was reached more rapidly on the lubricated condition than non-lubricated and was appeared rapid increase of AE generation by crack and breakage.