ON THE ANALYSIS OF CHIP TEMPERATURE DISTRIBUTION IN ORTHOGONAL MACHINING

Analytical methods of solution for the chip temperatures including tho se along the shear plane and the tool/chip interface have been develop ed for typical cases of orthogonal machining with a continuous chip. T o make the model more realistic, the shear plane is made to be incline d with the chip velocity, as generally occurs. It is shown that this g eometrical condition can be relaxed, which results in considerable mat hematical simplification. It is found that the temperature distributio ns along the chip back (chip/air interface) taken directly from experi ments by an infra-red thermo-tracer can be best used for verification of previous models. The experimental data are seen to seriously disagr ee with the previous results near the interface of chip/work free surf ace. It is also found that consistent predictions of these temperature s can be made by introducing a more realistic boundary condition into the analytical model.