Metalloobrabotka № 4 (76)/2013

Processing Of Materials By Cutting

Vasilkov D. V., Kochina Т. В. Modelling of contact interactions taking into account the rheology in the cutting zone at high-speed processing of products from heat resisting alloys

The dynamic model of technological system is offered at the high-speed machining, constructed on the basis of rheological representation of contact interactions in a cutting zone. Identification of parameters of model for the solution of a task is executed by a method of piecewise and linear approximation.

Keywords: modelling, dynamics, high-speed cutting, friction.

Kizhnyaev Yu. I., Nemtsev B. A., Yakovlev P. D. Design and application of technology for processing deep holes in the «Housing» parts from titanium alloy

The following main deep boring operation design tasks were considered for processing of deep holes in special housings from titanium alloy: blank mounting scheme development, definition of conditions for transportable chips production and selection of optimal cutting modes. Specified mathematical models are based on theoretical and experimental research of 30-60 mm holes deep boring processes. The work results were confirmed in practice during processing of 2 lots of the «housing» blanks.

Keywords: titanium alloy, deep through boring, technology design.

Kiseleva E. V. The role of surface phenomena in metal cutting using superfine emulsions

Experimentally proved that the use of fine emulsions significantly improves their tribological characteristics on the blade of metal cutting operations.

Keywords: cooking oil-water emulsion, dispersion, surface energy, interfacial surface, tool wear.

Electrophysical And Electrochemical Processing Methods

Samarkin A. I., Negina O. V. Improving the accuracy of treatment at edm wire cutting

The article is devoted to the discussion of issues related to the effect of pumping dielectric fluid on form unprofiled wire electrodes, and thus the accuracy of EDM wire cutting. The possibility of increasing the accuracy of processing by the compensation process by correcting the errors of the control program the machine.

Keywords: EDM wire cutting, electrode wire, pumping a liquid, dielectric, numerical simulation, diagrams.

Topoljanskii P. A., Ermakov S. A., Sosnin N. A., Topoljanskii A. P. Comparative analysis of wear-resistant coatings properties on drilling tools hardening

Modern technologies of thin-film wear-resistant coatings: CVD- and PVD-processes have been examined, as well as the new finishing plasma hardening technology (FPH). This method relates to the processes of beadless chemical coatings deposition of thin-film coating, carried out at at­mospheric pressure with the use of liquid organoelemental compounds and gaseous atmosphere and with PECVD by cold atmospheric plasma. Comparative physical/mechanical and tribological characteristics of different wear-resistant coatings are given, and the results of model and industrial tests of finishing plasma hardening technology applied to powdered metal high-speed steel drills hardening are reported.

Keywords: modification, PVD, CVD, PECVD by cold atmospheric plasma, finish plasma strengthening, wear-resistant nanocoating, tribological tests.

Kulikov M. Y., Inozemcev V. E., Nechaev D. A., Naing Oo Myo. The influence of electrical activation on the surface quality during finishing plastic materials

Current trends in the engineering aimed at improving the quality finishing of parts, especially parts of friction and other components operating in complex environments with dynamic loads. In this connection there is the need for high quality processing surface in silumin and cermets which are difficult to machine materials. For this purpose the use of electrical activation of the cutting process fluid used in the machining process. Electrical activation contribute to the achievement of the required quality parameters of the surface. Thus, the processing required cermets achieved porosity and surface roughness, while silumin processing can significantly reduce the roughness.

Keywords: cermet, silumin, roughness, porosity, electrical activation, mechanical engineering, machining, quality settings.

New Materials And Production

Sokolv Yu. A. The features of modeling of process of layerwise synthesis of products with the help of an electronic beam

Win this study the questions of modeling of process of synthesis of products are considered by an electronic beam. The features are marked out at the process description. The models of a scanning electron beam and models of mass carry and heat transmission are put in a basis of research.

Keywords: mathematical modeling, synthesis of products, electron beam, mass carry, heat transmission.