Financial costs for the introduction of cutters from hexanite-P when turning coatings deposited with flux-cored wires

Abstract

The paper presents a methodology and an example of calculating financial costs when introducing cutters made of a superhard material based on boron nitride of the hexanit-P type during finishing turning of materials deposited with flux-cored wires. The dependence of the main costs on the cutting speed and the material of the deposited layer is established. It is shown that the costs of wages for a worker, equipment, electricity and tools mainly depend on the technological parameters of the processing process, the properties and heterogeneity of the cut layer of the coating. The technological cost of processing the deposited materials can more accurately serve as an assessment of the performance of tools made of super hard materials when they are introduced into repair production.

As a result of the calculation of the processing of a number of coatings with different chemical composition and varying degrees of inhomogeneity, the effect of cutting speed on the technological cost of processing was obtained, by which one can judge the effect of financial costs on the performance of cutters made of hexanit-P. It has been established that with an increase in cutting speed, the technological cost decreases sharply to a cutting speed of 1.5...2.0 m/s. A further increase in cutting speed has little effect on reducing the technological cost of processing. In this case, for each deposited material, its own range of cutting speeds is visible, which can be taken as optimal even with such an assessment of performance. It has been determined that the nature of the effect of cutting speed, that is, processing productivity, on financial costs is approximately the same, but the value of the technological cost depends on the properties and heterogeneity of the coating. With an increase in the hardness and heterogeneity of the coating, the technological cost of processing decreases, but an extremum, such as when changing the resistance or cutting path, is not observed on the curves. It has been established that the assessment of the performance of tools made of super hard materials during finishing turning of coatings by financial costs of processing can more accurately ensure their rational use. When processing coatings with cutters made of hexanite-P, higher cutting speeds should be assigned than they are determined depending on the maximum resistance for the accepted wear criterion.