РОЗРАХУНКОВО-АНАЛІТИЧНІ МОДЕЛІ ВИНИКНЕННЯ ПЕРЕВАЖНИХ ВИДІВ ВІДМОВ РІЗАЛЬНОГО ІНСТРУМЕНТУ

The paper presents analytical and numerical models for assessing the reliability of cutting tools used in the processing of critical parts for the defence and energy industries. The criteria of boundary wear on the back and front surfaces, possible fatigue failure and plastic deformation of the cutting edge are taken into account. Analytical dependencies have been constructed to calculate the number of parts that can be machined before tool failure, taking into account the physical and mechanical characteristics of the tool and processed materials, technological modes and thermal loading conditions. The results allow for the selection of tools and cutting parameters based on increased reliability and process optimisation. These mathematical dependencies make it possible to take into account the predominant type of cutting tool wear, which is especially important when working with large parts on heavy machine tools. The results of the study are of practical importance for industry, as they allow to increase the stability and productivity of technological processes.