Variation in friction coefficient with tool wear
The acceleration component resulting from flank wear alone is isolated from vertical tool vibration signals collected by an accelerometer mounted safely away from the cutting process. The friction force and friction coefficient are computed from this component to show that they decrease at the initial stages of wear, reach a minimum near the critical wear, and increase again. Empirical models are proposed and estimated with the computed values. The importance of these models in predicting the coefficient in the hazardous region of large wear, from data collected in the safe region below critical wear, is delineated. Possible mechanisms for this behavior based on the current theories of friction and wear are discussed. © 1983.
Variation in friction coefficient with tool wear.
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