MODELING OF HEAT TRANSFER OPERATION WITHIN THERMAL FRICTION CUTTING FOR CONSTRUCTIONAL STEEL WORKPIECES

The influence of anisotropic properties of structural steels on the change in thermal conductivity in various areas of the contact zone under thermal friction cutting is viewed. Obtained mathematical models afford to construct vector equations of thermal conductivity for a medium with different properties in various directions. The developed mathematical dependences made it possible to obtain a model of a scalar temperature field, the results of calculating the temperature field along the workpiece plate are given, taking into account the anisotropy of the thermal properties of the work material. The solution of the equations made it possible to construct temperature fields in a system of relative and physical coordinate systems. The measurement results of the isotherms coincide with the experimental data, so it can be concluded on their interrelationship. As a result of the performed studies, it was proved that in an anisotropic medium, the directions and orientation order of heat flows change towards colder zones of the workpiece and tool due to the difference in the heat transfer coefficients for cold and heated materials. The above process helps to equalize the temperature in the contact area of the tool and the workpiece.

thermal friction cutting, contact zone, heat flow, temperature fields, anisotropic medium