Shapovalov M. Hardening carbide tools the pulsed magnetic field processing for machining heavy machinery

The problem of increasing the efficiency of machining parts on heavy machines was determined in the thesis, scientifically substantiated and solved by hardening a carbide toolthe pulsedmagnetic field processing (PMFP). The efficiency of machining of parts is understood as an increase in its productivity, a reduction in the cost and costs of tool materials, and an increase in instrument reliability.The working conditions of cutting tools at heavy engineering enterprisesare analyzed. The wear resistance of carbide cutting tools, which have been strengthened by the PMFP, was investigated using forced test methods and modeling of the cutting process. The mechanism of changing the properties of a solid alloyunder the action of a pulsed magnetic field is established. The main factors affecting the change in the wear resistance of a solid alloy under the action of a pulsed magnetic field are identified. The effect of pulsed magnetic field processing on the performance of carbide cutting tools under production conditions is investigated. The effect of hardening on productivity, cost of operation and instrumental costs is established. The interrelation of the parameters of the PMFP, the parameters of the process of machining parts and production efficiency is investigated. A statistical model has been developed that allows determining the productivity of mechanical processing depending on the properties of the tool material and the processing parameters of a pulsed magnetic field. The effect of volumetric hardening by processing a pulsed magnetic field of a carbide cutting tool has been establishedfor roughing parts on heavy machines. It is revealed that after sharpeningthe tool, the hardening effect remains. It is recommended to take into account the results of the evaluation of the parameters of the surface defect layer when sharpening a tool with soldered cutting inserts. Technological method of processing pulsed magnetic field carbide cutting tools is developed. Technological recommendations to improve the efficiency of machining operations for large-sized parts on heavy lathes are implemented.