Abstract
This paper presents a theoretical and experimental study of the dynamic temperature field on a milling cutter tooth. A finite element model is developed to simulate the heat cycle of the cutting tooth by a time-varying heat flux. Forced convection effect has been investigated at exit. Experiments on simulating thermal process of face milling by heating cemented carbide teeth with laser pulses have also been conducted; the dynamic temperature field on a cutting tooth was measured. It has been shown that when the tooth is disengaged its temperature does not decrease to a level which will induce tensile stresses on the rake face. Thus, thermal cracks are not initiated during this stage of cutting. In this paper the authors propose that thermal cracks develop cyclically with increases in the temperature gradient at each entry of the cutter into the workpiece.
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