Refinement of temperature determination in cutting zones

A methodology for temperatures calculating in different cutting zones is proposed, taking the peculiarities of heat distribution for moving sources into account. For this, the correlation was established between the heat flow densities and temperatures in the chip forming area, in the stagnation zone as well as in the zone of plastic contact between the chip and the tool. The method for temperature calculation was based on the joint solution of the heat conduction equation and the constitutive equation of the machined material. A significant simplification of the temperature calculation was achieved without sacrificing accuracy by considering the features of the heat propagation from fast-moving sources. Taking into account material softening, the temperature and heat flow density distributions along the tool rake and clearance faces and in the stagnation zone were numerically calculated. The developed models were confirmed by experiment. The comparison showed good agreement between theoretical and experimental results.