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Metalloobrabotka № 1 (91)/2016 |
Oleynik A. P. A spatial kinematic model of chip curling with variable rake face tools in metal cutting In most studies, researchers consider that in metal cutting chip curls in the normal to the tool cutting edge plane (up-curl) and in the tool rake face plane (side-curl). Recent studies prove conclusively the existence of the third pattern of chip curl that is called lateral-curl. Based on an analytical modeling, a new kinematic model is presented for the chip curling with complex tools in metal cutting. It is demonstrated that chip forms can be determined by the follow variables: the chip up-, side- and lateral radii, the chip side-flow angle and the cutting tool parameter that is taking into account variable conditions of chip flow with the tool rake face. It is shown that variable conditions of chip flow with the tool rake face contribute to intensification of chip lateral-curl. A computer-simulated chip forms were programmed to show more clearly the effect of velocity of chip lateral-curl on chip forms. Design metal-cutting tools based on kinematic model of chip curling considering the three patterns of the chip will optimize a complex, curved geometry of the tools rake face that extends chip control and chip breaking capabilities. Keywords: kinematic model, chip curling, chip form, metal cutting. Sokolov Yu. A., Pavlushin N. V. Installation for the implementation of the ionic chemical and thermal processing of powders In the present article the operation of ionic chemicalheat treatment for the purpose of high-quality powder’s receiving is considered. As a result of this operation carbides, borides, nitrides of refractory metals and alloys are formed; also it provides a necessary complex of thermophysical and mechanical properties. The process is carried out of one or gases’ mix: nitrogen, fluorine, carbonic gas, acetylene, fluoric boron, etc. The design of specialized installation for realization of chemicothermal treating’s operation is considered. Keywords: powder, chemicothermal treating, specialized facilities, functions, control system. Keywords: layered synthesis, composite products, electron beam, electron beam deposition, additive technologies. Sokolov Yuri A., Ravilov R. G. Electron-beam technology of composite products’ receiving In the article new innovative approach to the powder’s receiving and composite products of various chemical composition with programmable structure which not installed within equilibrium and quasiequilibrium technological processes, by methods of layer-by-layer electronbeam melting/agglomeration and evaporation on the basis of numerical mathematical modeling is considered. Keywords: Layer-by-layer synthesis, composite products, electron beam, electron-beam evaporation, additive technology. Khaldeev V. N. About torch transport One of the effective ways of a decrease of the intensity of wear process of an electrode-tool in the course of electroerosive processing is a torch transport to its working surface of a material of processed preparation. The article presents results of an experimental study of elemental and phase composition of a film formed upon the electrode-tool working surface. Keywords: electroerrosion processing, the wear rate of the tool, protective foil, torchlight transfer, spectrogram. Krasnyy V. A., Maksarov V. V. Tribological properties of mining machine parts with regular microgeometry of the surface The technological possibilities of the method vibration burnishing to form a regular microgeometry surface to enhance performance properties of machine parts. The results of studies to improve the wear resistance and fretting resistance surfaces of parts with regular microgeometry in lubrication conditions, and in its absence, including for heavy mining machinery units, often working under extreme vibration. The comparative method vibration burnishing of tribological characteristics compared with a number of wearresistant coatings in the conditions of fretting. Keywords: vibration burnishing; regular roughness; friction pair; wear resistance; fretting resistance. Dudkina N. G., Chekunov V. V. Effect of combined treatment EMТ + SPD on damping properties of medium carbon steel The technology of the combined surface hardening of the steel workpieces consist of electromechanical treatment (EMT) and the subsequent surface plastic deformation (SPD) is considered. The results of the study the damping properties of hardened EMT + SPD steel 45. Steel samples before and after their strengthening by means of SPD, EMT, EMT + SPD have been compared to study the principles of mechanical energy dissipation. The received results can be used for method to reduce dynamic loading of components operating under cyclic loads and vibrations Keywords: combined hardening, electromechanical treatment (EMT), surface plastic deformation (SPD), diagram stretching, surface layer, steel, structure, white layer, hysteresis width, damping behavior. Bespalov D. A., Vorobeva G. A., Danilin G. A., Remsha EY. United springs quality inspection, are made of titanium alloy Results aerotermoakusticheskoy processing studies on the mechanical characteristics sticks springs fabricated from titanium alloys. Keywords: Acoustic emission, titanium alloys, nondestructive testing. Petrov P. S., Feofanov A. N., Rybakov A. V. Creation of computer development environment to solve layout problems (For example, automated layouts universal modular devices) Justification automation synthesizing graphic circuit diagrams of modular devices of elements USP. The introduction of the concept of the Knowledge Base (KB) and a description of its content. (The emphasis is placed on the knowledge base). |