6ANDREASEN JL, Dechiffm L. Automatic Chip- Bmaking Detection in Turning by Frequency Analysis Of Cutting Force[C].Annals Or the CIRP, 1993. 42(1):45-48.
7TARNG Y S, HSEIH Y W, HWANG S T. Sensing Tool Breakage in Face Milling with a Neural Network[J]. Int. J. Mach.Tool Manufact,1994,34(3): 341 - 350.