A sensor for the detection of tool breakage in NC milling

Abstract A new practical sensor system for the detection of tool breakage in milling has been developed. The tool breakage feature in the cutting-force signal is studied and then extracted to detect tool breakage. By using a simple pattern analysis and choosing a threshold value, it is found that the proposed monitoring scheme can detect tool breakage under varying cutting conditions. Theoretical studies and experimental results performed in milling operations have proven the feasibility of this method proposed.