Drilling of hardened steel 40 HRC 24...32 is investigated using numerical simulation in Abaqus/Explicit. The stress-strain state is analyzed. It has been found that optimization of cutting modes (feed speeds and revolutions) reduces Mises stresses to 55% of the ultimate strength, increasing tool durability. The results show the dependence of stress distribution on cutting parameters and the influence of drill geometry on the machining process.

Keywords: drilling, hardened steel, numerical modeling, finite element method, Mises stresses, tool durability, optimization of cutting modes, drill geometry

The effect of the feed on the tooth on the durability of a carbide tool when cutting corrosion-resistant austenitic steel 08H18N10T on a milling machine is being experimentally investigated. The main attention is paid to the analysis of the mechanisms of tool wear, chip formation and the phenomenon of riveting in various cutting modes. It is shown that a paradoxical decrease in feed from 0.07 mm/tooth to 0.06 mm/tooth increases adhesive wear and worsens chip removal, which leads to a decrease in tool durability by 5.7% and a decrease in the number of cuts by 16-23%. The test results confirm that the optimal feed rate is 0.07 mm/tooth ensures a stable process with abrasive wear and curled chips, increasing tool life.

Keywords: cutting, austenitic steel 08H18N10T, carbide tool, tool durability, tooth feed, adhesive wear, chip formation, riveting, optimization of cutting modes