Comparision and analisys of in-process tool condition monitoring criterions in milling

Even with the best process design, incidents may still occur during machining. Considerable damages for the product and the machine-tool, may then be involved by the high feeds currently used. Therefore, process monitoring is suitable to ensure both product quality and process safety. Yet there is a lack of process monitoring solutions for small batch sizes or one-off production, which usually concerns high added value parts. Researchers have proposed various criterions to detect tool breakage, based on the milling force waveform. Our work aimed at estimating the relevancy of these criterions by machining a specific part under various cutting conditions. Criterions are compared and analyzed according to the measured cutting force signals. Then, improvements are suggested in order to increase their efficiency.