The relevance of studying the thermophysical processes of machining is due to the fact that
the heat released during the cutting operation largely determines the load on the cutting tool, his
firmness and also quality and accuracy of the sizes of the processed surfaces.. Therefore, the researches of working processes in the cutting zone during hole machining and the development on
this basis of practical recommendations for improving the hole machining accuracy by reducing the
error of its profile is an important scientific and practical task in the field of processing by cutting.
The most important input parameters were established and the degree of their influence on
the temperature distribution of a detail in the cutting zone when processing holes is defined by the
axial tool. The main methods of eliminating or minimizing the distortion of the hole profile are defined, which consist in compensation for the mutual influence of various parameters on the distortion of a profile of a detail and differentiation of magnitude of the most important controlled parameters by the depth of the hole.
It has been established that the cutting speed has the greatest impact on the breakdown of the
hole. An increase in the cutting speed within the studied interval of speeds leads to increasing in the
breakdown of the hole due to an increase in the intensity of heat fluxes and an increase in temperature deformations of the tool and a detail. Increase in depth of cutting and feed also contributes to
an increase in the breakdown of the hole, but their influence is less significantly.