Tool fracture detection in end milling using cutting force and acoustic emission propagated through cutting fluid

엔드밀 가공시 절삭력과 절삭유를 통해 전파된 음향방출을 이용한 공구파손 검출

End milling experiments are conducted to investigate characteristics of acoustic emission (AE) and cutting force singals due to tool fracture. The AE signals are obtained with a sensor attached to cutting fluid discharge nozzle. Tool states are identified with scanning electron microscopy and optical microscopy. It is demonstrated that the AE signals provide reliable informations about the cutting processes and tool states. Morever, tool fracture can be detected successfully using both the AE count rate and the standard deviation of principal cutting force.