VORONEZH SCIENTIFIC AND TECHNICAL
Technology and equipment for mechanical and physical-technical processing
Fadeev, S. A. Acoustic intensification of processes in glow discharge plasma for technological processes / S. A. Fadeev, L. R. Shaidullin, A. M. Kadyrmetov // Voronezh Scientific and Technical Bulletin. – 2021. - V. 1, No. 1 (35). - P. 3-13. Access mode: http://vestnikvglta.ru/arhiv/2021/1-1-35-2021/3-13.pdf - Head. from the screen. – DOI: 10.34220/2311-8873-2022-3-13.
Annotation. For the purpose of technological application in the processes of preparation and deposition of plasma coatings, studies of the mutual influence of acoustic action on low-temperature plasma were carried out, the experimental procedure and the results of the study in a tube at a resonant excitation frequency were presented. The nonlinearity of sound vibrations and their amplification with increasing pressure are found, which can be used to intensify the processes of applying plasma coatings.
Keywords: SOUND VIBRATIONS, GLOW DISCHARGE, PLASMA, EXPERIMENT, PIPE.
Gorozhankina, O.V. Peculiarities of application of coatings of iron by electro-galvanomechanical method / O.V.
Annotation. The paper analyzes the technological process of electro-galvanomechanical coating in comparison with a similar process without mechanical impact on the formed coating.
Keywords: electrogalvanic process, electrogalvanic process, coating, hardness, wear resistance.
Gorozhankina, O.V. Vinokurova I.M., Kadyrmetov A.M. To the question of structural features of iron coating of increased thickness obtained by electrogalvanic layer-by-layer hardening //
Annotation. The process of electrogalvanic production of coatings of increased thickness with layer-by-layer mechanical hardening is considered. The mode of deposition and the scheme of coating deposition, the research technique and the results of X-ray analysis of internal stresses are given.
Keywords: COATING OF INCREASED THICKNESS WITH LAYERED MECHANICAL HARDENING, ELECTROCRYSTALLIZATION, INTERNAL STRESSES
Kadyrmetov, A. M. Features of the use of gas-thermal and plasma methods for obtaining
Annotation. The article provides recommendations for the modes and parameters of gas-thermal and plasma coating technologies in relation to flat friction pairs subject to uneven operating loads.
Keywords: GAS THERMAL SPRAYING, FLUSHING
Popov, D. A. Metastable structure of an austenitic manganese alloy and prospects for the creation of parts
Annotation. Comparative microstructural studies and mechanical tests of an experimental austenine manganese alloy and standard structural materials have been carried out. As a result of the research, relative data were revealed, indicating the high mechanical properties of the experimental alloy, allowing it to be recommended for machine parts operating under high load-speed operating conditions and temperature exposure up to 700 0C.
Keywords: MANGANESE ALLOY, AUSTENITE, MICROSTRUCTURE, WEAR RESISTANCE, HEAT RESISTANCE, HARDENING
Kadyrmetov, A. M., Popov D. A., Agarkov S. D. Multicomponent coating FeCoCrAlTiCuMo, created by atmospheric plasma metallization with multiple reflow // Voronezh scientific-technical bulletin. - 2021. - V. 1, No. 1 (35). - S. 41-48. Access mode: http://vestnikvglta.ru/arhiv/2021/1-1-35-2021/41-48.pdf - Head. from the screen. – DOI: 10.34220/2311-8873-2022-41-48.
Annotation. The microstructure and phase composition of a coating obtained by plasma spraying of FeCoCrAlTiCuMo powder in an equiatomic ratio of components has been studied. The results showed the possibility of creating a multicomponent single-phase solid solution by plasma spraying and the feasibility
Keywords: PLASMA SPRAYING, MULTI-COMPONENT ALLOY, STRUCTURE AND PROPERTIES
Kuts, V. V. Construction of empirical dependences of axial force when drilling workpieces from alloy D16 in an elastically deformed state / V. V. Kuts, M. S. Razumov, A.S. Byshkin, P. V. Glazkov // Voronezh Scientific and Technical Bulletin. - 2021. - V. 1, No. 1 (35). – S. 49-55. Access mode: http://vestnikvglta.ru/arhiv/2021/1-1-35-2021/49-55.pdf - Head. from the screen. – DOI: 10.34220/2311-8873-2022-49-55.
Annotation. Increasing drilling efficiency is an important task in mechanical engineering. An improved method is proposed for drilling a part in metal, which is elastically deformed in the area below the proportionality limit before drilling, which ensures that other dimensions remain unchanged. Empirically, the dependences of the axial force were obtained when drilling blanks from duralumin D16 in an elastically stressed state. These dependencies allow you to select the correct cutting conditions when drilling parts from D16 duralumin.
Keywords: DRILLING, ELASTIC LIMIT, STATE, DEFORMATIONS, BLANK, AXIAL FORCE, DURALUMINUM.
Operation of road transport
Volkov, V. S., Lebedev, E. G., Nabatnikova, E. A. The ability of a main road train to overcome steep road climbs. Voronezh Scientific and Technical Bulletin. - 2021. - V. 1, No. 1 (35). - S. 56-62.
Annotation. The analysis of changes in the dynamic characteristics of the transport operation of the main road train in road conditions with overcoming areas of difficult traffic, characterized by the presence of steep ascents, is considered. The solution of the problem under consideration is presented in the options for determining the limiting angle of the road, which can be overcome by a road train that has given operational characteristics and engine power expended on overcoming these road sections.
Keywords: ROAD TRAIN, ROAD LIFT, ROAD RESISTANCE, POWER, DRIVING FORCE, ROAD CLIMBING ANGLE
Pryadkin, V. I.Artemov, A. V., Kolyadin, P. A., and Kol’tsov, A. Yu., Destructive effect of wide-profile truck tires on the design of road pavement, Voronezh Scientific and Technical Bulletin. - 2021. - V. 1, No. 1 (35). - S. 63-71. Access mode: http://vestnikvglta.ru/arhiv/2021/1-1-35-
Annotation. The article presents a mathematical model of the destructive effect of a wide-profile tire on the roadway. The mathematical model makes it possible to fairly adequately reproduce the impact of a wide-profile tire on the road surface, taking into account the load and parameters of the tire, as well as the structure of the road surface and the temperature state.
Keywords: WIDE PROFILE TIRE, ROAD SURFACE, PARTICLE DYNAMICS METHOD, SIMULATION, PRESSURE DISTRIBUTION.
Snyatkov, E.V. Examination of the hood of a car to identify the causes of convex deformations / E.V.
Annotation. Modern methods of restoring car body parts include many interrelated operations performed in accordance with certain requirements. The repair, as a rule, is controlled by both the organization that carried out the repair and the owner of the car. Often after the repair, there are disagreements in assessing the quality. The article describes a technique for determining the places of damage hidden from observation without using a destructive method. Based on the application of non-destructive testing methods and analysis of the chronology of events, conclusions were drawn about the cause of the formation of convex deformations of the hood. The article may be useful to specialists working in the field of body repair, as well as experts assessing the quality of body repair.
Keywords: BODY REPAIR, EXAMINATION OF CARS, NON-DESTRUCTIVE TESTING, DEFORMATION
Technology and equipment for mechanical and physical-technical processing
Zhachkin, S.Yu. Modeling the propagation of elastic waves in a three-component medium during the formation
Annotation. In a three-component medium, when it is deformed, elastic waves propagate in the longitudinal direction on the wave surface. In this work, we studied the behavior of elastic waves, their influence on the quality of the propagation medium during the formation of composite coatings during plasma spraying. A block diagram has been compiled for creating a software product that facilitates theoretical studies of wave processes in a three-component medium.
Key words: ELASTIC WAVES, THREE-COMPONENT MEDIUM, PLASMA SPRAYING, COATING, MEDIUM POROSITY.
Kadyrmetov, A. M. Properties of plasma coatings sprayed in the arc power modulation mode / A. M.
Annotation. The paper shows that by means of plasma arc modulation, as well as the use of an air-gas mixture (air with propane butane), it is possible to significantly increase the bond strength of the coating with the substrate, the powder utilization ratio, reduce gas permeability and increase the wear resistance of plasma powder coatings.
Keywords: PLASMA SPRAYING, BIPOLAR MODULATION, STRENGTH OF COATING AND BASE COUPLING, GAS PERMEABILITY, PROPERTIES.
Popov, D. A., Snyatkov, E. V., Plakhotin, A. A., and I. A. Popov, E. V. Snyatkov, A. A. Plakhotin, and I. A.
Annotation. The article presents the results of studies of the effect of multiple plasma jet reflow of a multicomponent FeCoCrAlTiCuNiMo coating obtained by plasma metallization in an open atmosphere on its wear resistance in dry sliding friction. The research results indirectly confirm the influence of the entropy of the coating on the increase in its wear resistance with an increase in the number of reflows.
Keywords: PLASMA SPRAYING, PLASMA CURRENT MODULATION, MULTI-COMPONENT COATING, FLUSHING, WEAR.
Ivannikov, V. A. Improving the strength characteristics of crankshaft journals by plasma spraying with subsequent plastic deformation / V. A. Ivannikov, V. N. Bukhtoyarov, A. V. Chupakhin, S. N.
Annotation. Existing methods for improving the strength characteristics of parts do not always provide the necessary characteristics of working surfaces. And as a result, the durability of parts falls, and subsequently it is required to carry out expensive repairs of the unit or unit. The article considers a method of hardening surfaces, which can be applied to parts operating under alternating loads, in particular crankshafts. The use of plastic deformation of plasma coatings makes it possible to improve the main strength characteristics of the surface. The work can be useful for workers of auto repair production, car services and motor transport enterprises.
Keywords: PLASMA SPRAYING, CRANKSHAFT, PLASTIC DEFORMATION, COATING QUALITY.
Kuzovkin, A. V. Design, manufacture and application of a combined tool for the formation of curved surfaces / A. V. Kuzovkin, A. P. Suvorov, Yu. S. Zolototrubova // Voronezh Scientific and Technical Bulletin. - 2021. - V. 2, No. 2 (36). - S. 35-41. Access mode: http://vestnikvglta.ru/arhiv/2021/2-236-2021/35-41.pdf - Head. from the screen. – DOI: 10.34220/2311-8873-2022-35-41.
Annotation. The problem of processing high-strength materials by electroerosive machining is considered. problems in the design and manufacture of an electrode-tool for direct and reverse copying can be found based on the use of modern digital prototyping technologies.
Key words: ELECTROPHYSICOCHEMICAL PROCESSING, COMPLEX PROFILE SURFACE, COMBINED TOOL, DESIGN, MANUFACTURING.
Operation of road transport
Latynin, A. V. Features of using the method of thermalth diagnostics of hydrostatic transmission of logging machines / A. V. Latynin, A. N. Shvyrev, I. Yu. Kondratenko, I. S. Andreishcheva // Voronezh Scientific and Technical Bulletin. - 2021. - V. 2, No. 2 (36). - S. 42-49. Access mode: http://vestnikvglta.ru/arhiv/2021/2-2-36-2021/42-49.pdf - Head. from the screen. – DOI: 10.34220/2311-8873-2022-42-49.
Annotation. The extraction of timber in the territory of the Russian Federation is carried out mainly by logging technical complexes, made on the basis of machines with a hydraulic drive. In turn, of the currently known types of hydrodynamic transmission, the most advanced is the hydrostatic transmission. Despite the exceptional reliability of such equipment, hydrodynamic transmission, including hydrostatic transmission, has a large number of failures. The main hydrostatic transmission failures include malfunctions of the wheel drive hydraulic motor. Therefore, the purpose of this study is to use the method of thermal diagnostics to reduce the number of failures in hydrodynamic transmission, including hydrostatic transmission.
Keywords: HYDROSTATIC TRANSMISSION, THERMAL DIAGNOSTICS, DEFECT, WEAR, TEMPERATURE, TRANSMISSION LOW, RELIABILITY
Ivannikov, V. A., Nikulin M. A., Samoilenkov S. S. Determination and provision of the optimal thermal profile of transmission units of wheeled vehicles during operation at low temperatures // Voronezh Scientific and Technical Bulletin. - 2021. - V. 2, No. 2 (36). - S. 50-57. Access mode :
Annotation. The article considers materials on the optimization of the temperature regime of transmission units of wheeled vehicles during operation at low temperatures. In preparing this review, publications in Russian published between 2000 and 2021 were used. The analysis of materials concerning the determination of the optimal temperature regime of the transmission units of machines has been carried out, integrated heat supply systems have been considered. Directions for further development of the issue of determining and ensuring the optimal thermal profile of transmission units and assemblies of wheeled vehicles are proposed.
Keywords: TRANSMISSION UNITS, WINTER CONDITIONS, OPERATING TEMPERATURE CONDITIONS, POWER LOSS, OPTIMAL THERMAL CONDITION, THERMOREGULATION.
Popov, D. A., Simakin, I. A., Agarkov, S. D., Goryachev, N. A. Technical problems in the conversion of vehicles to natural gas fuel and ways to solve them, Voronezh Scientific and Technical Bulletin. - 2021. - V. 2, No. 2 (36). - S. 58-64. Access mode: http://vestnikvglta.ru/arhiv/2021/2-2-36-2021/58-64.pdf - Head. from the screen. – DOI: 10.34220/2311-8873-2022-58-64.
Annotation. The article provides an analysis of the technical experience of operating gas-engine engines, in particular, cars of the GAZ family with a ZMZ engine when they are transferred to a dual-fuel gas-gasoline power supply system. The main technical challenges faced by car owners, maintenance and repair services are noted. Possible ways of their solution are proposed.
Keywords: GAS ENGINES, VALVE RESOURCE, METASTABLE ALLOY
Zelikov, V. A. Methods for optimizing the processes of road transport taking into account innovative technologies / V. A. Zelikov, D. K. Blagonravov, M. N. Kazachek // Voronezh Scientific and Technical Bulletin. - 2021. - V. 2, No. 2 (36). - S. 65-70. Access mode: http://vestnikvglta.ru/arhiv/2021/2-2-36-2021/65-70.pdf - Head. from the screen. – DOI: 10.34220/2311-8873-2022-65-70.
Annotation. In this rapidly changing world, the need for a product is growing day by day. Accordingly, transport plays an important role in society. The profits and wealth of companies that transport goods from one corner of the country to another are determined by transport. In an increasingly competitive environment in the transport sector, participating companies must adopt new existing technologies and significantly improve the quality of their services in order to stay in business. The purpose of this research work is to study modern methods for optimizing road transport processes, taking into account innovative technologies.
Keywords: PROCESS OPTIMIZATION, INNOVATION, IMPORT, TECHNOLOGY, LOGISTICS, TRANSPORT.
Khripchenko, M. S. Modeling the process of regulating the operating thermal regime of power plants / M. S. Khripchenko, D. A. Popov, A. V. Goncharov, M. S. Vasilenko // Voronezh Scientific and Technical Bulletin. - 2021. - T.
Annotation. An improved technique for thermal and aerodynamic calculation of elements of power plant cooling systems is presented. The dependences of the time to reach the optimal thermal regime of the power plant with rigid and controlled cooling systems are given.
Keywords: ADJUSTABLE HEAT MAINTENANCE SYSTEM, THERMAL CALCULATION, AERODYNAMIC
Technology and equipment for mechanical and physical-technical processing
Boldyrev, A. I. Influence of electrolyte flow parameters during electrochemical dimensional processing on
Annotation. The paper presents the results of a study of the influence of the schemes for the supply and removal of the electrolyte flow and its parameters (electrolyte pressure at the inlet РВХ and pressure drop Δр) on the quality of electrochemical shaping of holes in samples of stainless and titanium alloys used in the manufacture of parts of rocket and space technology. It is shown that the change in РВХ and Δр has a significant effect on the quality of hole formation. It has been experimentally established that the lateral electrolyte supply scheme is preferable.
Keywords: ELECTROCHEMICAL HOLING, ELECTROLYTE FLOW SUPPLY, STAINLESS AND TITANIUM ALLOYS.
Topolyansky, P. A. Adhesion characteristics of a thin-film coating deposited during finishing plasma hardening / P. A. Topolyansky, S. A. Ermakov, A. P. Topolyansky // Voronezh Scientific and Technical Bulletin. - 2021. - V. 3, No. 3 (37). - S. 11-27. Access mode: http://vestnikvglta.ru/arhiv/2021/3-3-37-2021/11-27.pdf - Head. from the screen. – DOI: 10.34220/2311-8873-2022-11-27.
Annotation. The methodology for determining the adhesive characteristics of thin-film coatings applied from the vapor phase and used to protect parts from wear and corrosion is considered. The study of adhesive properties, along with the determination of thickness, elemental composition, structure, physico-mechanical, tribological characteristics, and wear coefficient, makes it possible to evaluate and select the optimal coating and its application technology for a specific industrial application. Using the a-C:H/a-SiOCN system diamond-like coating DLCPateks, deposited during finishing plasma hardening, as an example, the adhesion characteristics were evaluated according to ISO 20502:2005 by scratch testing and according to ISO 26443:2008 by indentation of a Rockwell diamond indenter. The first tests are related to determining the load at which the depth of indenter entry into the coating-substrate composition ceases to grow smoothly, which characterizes the moment of coating failure. The ratio of the load on the indenter, determined at the end of the passage of the coating thickness, to the load of the appearance of the first cracks or delaminations in these tests is conventionally called the adhesion coefficient. The influence of the coating thickness on the adhesion coefficient has been studied. Tests involving the use of a Rockwell diamond indenter qualitatively evaluate the adhesion properties of a coating by comparing the obtained and normalized prints. The results of the research have proven the increased adhesion characteristics of the DLCPateks coating.
Keywords: COATING, ADHESION, ADHESION STRENGTH, SCRATCH TEST, FINISH PLASMA HARDENING.
Al-Bdeyri, M. Sh. Kh.Krasilnikov, A. M. Kadyrmetov, S. V. Sergeev // Voronezh Scientific and Technical Bulletin. - 2021. - V. 3, No. 3
Annotation. A technology is proposed for creating heat-shielding wear-resistant coatings on the surface of parts of a cylinder-piston group (CPG) made of AK12MMgN alloy using a galvanoplasmic modification of microarc oxidation. For this purpose, a complete three-factor experiment of type 23 was carried out in the form of half-replicas of coating deposition. The dependences of the thickness, microhardness, wear resistance and porosity of the galvanic plasma coating on the technological parameters of the process are established. This technology seems to be effective, since it reduces fuel consumption by 5-7% and increases engine power by 8% while ensuring optimal properties of the heat-shielding layer.
Keywords: CYLINDER-PISTON GROUP, GALVANOPLASM MODIFICATION, HEAT-PROOF WEAR-RESISTANT COATING, FULL FACTORY EXPERIMENT, DISPERSION, FISHER CRITERION, REGRESSION EQUATIONS.
Nekrylov, A. M. Pulse-shock treatment of narrowing interscapular channels / A. M. Nekrylov, S. N. Kodentsev, A. O. Rodionov // Voronezh Scientific and Technical Bulletin. - 2021. - V. 3, No. 3 (37). - S. 36-41. Access mode: http://vestnikvglta.ru/arhiv/2021/3-3-37-2021/36-41.pdf - Head. from the screen. – DOI: 10.34220/2311-8873-2022-36-41.
Annotation. A technique and technological support for the specified parameters of the surface of a narrow narrowing channel with a swirl along the radius and a procedure for designing combine operations have been created.
of pulse-force hardening, a new patentable technological process for hardening narrow narrowing curvilinear channels by combined pulse-impact action with the advancement of a free tool (spherical granules) under conditions of low-frequency vibrations has been developed.
Keywords: IMPULSE-IMPACT HARDENING, COMBINED HARDENING, LOW-FREQUENCY OSCILLATIONS, HARDENING MODES, COATING, INTERBLADE CHANNEL.
Lebedev, V. A. Calculation of technological factors of finishing processing of long parts in screw
Annotation. The essence of helical rotors and their technological capabilities for finishing long parts are shown; Analytical dependencies are proposed for calculating the specific metal removal, duration and geometric dimensions of the part, rotor, granules of the processing medium, which provide the required quality of parts and processing performance in screw rotors.
Keywords: SCREW ROTOR, PROCESSING ENVIRONMENT, FINISHING, SPECIFIC METAL REMOVAL, PRODUCTIVITY.
Rapatsky, Yu. L. Application of the semi-Markov model for the study of the parameters of mechanical assembly
Annotation. A technique for studying the productivity and reliability of technological processes of mechanical assembly production at the stages of the life cycle of mechanical engineering products is proposed. A semi-Markovian mathematical model is proposed, which makes it possible to analyze, for example, technological processes for the manufacture of threaded connections. In the proposed model, the distribution functions (DF) of the service time of a unit of production are determined, taking into account failures. FDs make it possible to ensure the information consistency of models of various hierarchical levels and to explore the relationship between the stages of the life cycle of engineering products.
Keywords: SEMI-MARKOV MODEL, TECHNOLOGICAL HEREDITY, LIFE CYCLE STAGES.
Smolentsev, V. P. Finishing and cleaning of transitional sections of machine parts / V. P. Smolentsev, E. V. Smolentsev, Yu. S. Zolototrubova, V. G. Gritsyuk // Voronezh scientific and technical bulletin. - 2021. - V. 3, No. 3 (37). – S. 65-75. Access mode: http://vestnikvglta.ru/arhiv/2021/3-3-37-2021/65-75.pdf - Head. from the screen. – DOI: 10.34220/2311-8873-2022-65-75.
Annotation. The article discusses the methods of finishing and cleaning, including the design of an electrochemical processing process. The features of various schemes for the use of electrodes and tools are shown, which make it possible to achieve the necessary quality indicators while ensuring high productivity.
Keywords: COMBINED PROCESSING, ELECTROCHEMICAL PROCESSING, TECHNOLOGY, QUALITY.
Operation of road transport
Posmetiev, V.I., Nikonov, V.O., A.V.
Annotation. The main advantages of using timber tractors with semi-trailers in comparison with single timber trucks and timber trucks with trailers are listed. The analysis of the results of scientific works of foreign authors involved in improving the efficiency of timber tractors with semi-trailers in the process of hauling timber has been carried out. The existing conditions for the removal of timber in the Russian Federation by timber tractors with semi-trailers are considered. The negative consequences that manifest themselves in the process of moving along logging roads, limiting the efficiency of using logging tractors with semi-trailers, are described. Among them, the most significant one was singled out, which consists in the occurrence of significant efforts during braking of a timber tractor with a semi-trailer in a fifth wheel coupling, accompanied by the appearance of cracks in the elements of the carrier system, breakdowns in the coupling device, as well as the folding of a timber road train. The schemes of forces acting on a timber tractor with a semi-trailer in the process of braking are presented. The dependences of the change in the braking forces of the axles of a timber tractor with a semi-trailer are given, taking into account the non-simultaneous operation of their brake mechanisms, as well as the change in force in the fifth wheel of a timber tractor with a semi-trailer during braking. In order to increase
efficiency of a timber tractor with a semi-trailer, a promising design of a recuperative fifth wheel coupling is proposed.
Key words: FOREST ROAD, TIMBER TRACTOR, SEMI-TRAILER, FITCH, ENERGY RECOVERY, BRAKING PROCESS, KINETIC ENERGY,
Zhachkin, S. Yu. Patterns of the influence of operational parameters of plain bearings of motor vehicles on the temperature in the friction zone as a resource factor / S. Yu. Zhachkin, N. A. Penkov, S. V. Lazarev, G. I. Trifonov // Voronezh Scientific Research -technical bulletin. - 2021. - V. 3, No. 3 (37). - S. 95-101. Mode
Annotation. The results of a study of the dependence of the temperature of the friction zone of two bodies (shaft and inner sleeve) on the operating parameters of a plain bearing, such as pressure, sliding speed and radial load in terms of the resource of a friction pair, are presented. On the basis of a multifactorial experiment, a regression equation for the friction process is obtained, taking into account the influence of these parameters on the temperature in the contact zone, which makes it possible to determine the boundaries of the trouble-free operation of friction pairs of motor vehicles. Technological ways of solving the provision of the specified performance of a friction pair according to the temperature criterion without scuffing are proposed.
Key words: SLIDING BEARING, FRICTION, TEMPERATURE, PRESSURE, SLIDING SPEED, RADIAL LOAD, EXPERIMENT, RELIABILITY.
Posmetiev, V. I. Relevance of development and use in the design of a timber road trainrecuperative spring-hydraulic conic device / V. I. Posmetiev, V. O. Nikonov, A. E. Matyashov // Voronezh Scientific and Technical Bulletin. - 2021. - V. 3, No. 3 (37). - S. 102-116. Access mode: http://vestnikvglta.ru/arhiv/2021/3-3-37-2021/102-116.pdf - Head. from the screen. – DOI: 10.34220/2311-8873-2022-102-116.
Annotation. The advantages are described, as well as the possibilities inherent in timber tractors with trailers to achieve high technical and economic indicators, significantly exceeding those of single timber vehicles, as well as other comparable layouts of timber haulers. The analysis of the scientific works of foreign authors was carried out, which made it possible to identify the most significant factors on which the efficiency of the process of hauling long-length timber by timber tractors with trailers depends. The existing conditions for the hauling of long-length timber in the Russian Federation by timber tractors with trailers, as well as the negative consequences of their operation in difficult road and climatic conditions, are considered. It has been established that the insufficient equipping of logging roads is accompanied for logging road trains by a forced unsteady mode of movement, which leads to failure due to the impact of alternating loads from the side of the trailer-dissolution with timber of the pivot assembly of the rotary conic device of the logging tractor. In order to increase the efficiency of timber tractors with release trailers, as well as to minimize the negative impact on the pivot assembly of alternating loads from the forces of inertia of the release trailer with timber, a promising scheme of a recuperative spring-hydraulic rotary conical device is proposed. The necessary and sufficient tasks for the creation and practical use of the proposed device are formulated.
Key words: ROTARY BONE DEVICE, ENERGY RECOVERY, RELEASE TRAILER, TIMBER TRACTOR, TIMBER ROAD, BRAKING, TIMBER REMOVAL, EFFICIENCY.
Technology and equipment for mechanical and physical-technical processing
Silaev, D. V. Technological support of the process of combined hardening of blade surfaces / D. V. Silaev, S. N. Kodentsev, V. N. Gorelikov // Voronezh Scientific and Technical Bulletin. - 2021. - V. 4, No. 4 (38). - P. 3-11. Access mode: http://vestnikvglta.ru/arhiv/2021/4-4-38-2021/3-11.pdf - Head. from the screen. – DOI:10.34220/2311-8873-2022-3-11.
Annotation. The paper reflects the results of experimental studies and approbation of the processes of combined shaping of surfaces with a complex profile, such as blade machines. Methods for activating such surfaces before applying coatings by plasma spraying are proposed, technological schemes for combined processing are developed, and experimental results of research are shown.
Keywords: COMBINED STRENGTHENING, ELECTROEROSION, MICRO-protrusions, ANODIC DISSOLUTION, COATING, SUBSTRATE ACTIVATION.
Al-Bdeiri, M. Sh. Kh. On the issue of surface treatment of CPG parts in the process of coating them
Annotation. The influence of the pressure of sandblasting and the volume of alumina on the roughness of the substrate made of the AK12MMgN alloy, as well as on the roughness of the coatings deposited after blast cleaning, obtained by the galvanic-plasma modification of the GPM, and on the adhesive strength of these coatings is studied. It has been established that the proposed technology for surface treatment of parts of the cylinder-piston group of diesel engines (CPG) of internal combustion from the AK12MMgN alloy, both before applying GPM coatings and after applying them to the above alloy, makes it possible to obtain a heat-shielding layer leading to significant fuel savings in diesel internal combustion engines. This technique seems to be effective for treating the surfaces of diesel engine CPG parts before and after applying heat-protective and wear-resistant coatings, confirmed by full-scale and bench tests.
Keywords: CYLINDER-PISTON GROUP, GALVANIC-PLASMA MODIFICATION, HEAT-SHIELDING COATING, JET-ABRASIVE MACHINING, AVERAGE ROUGHNESS, FRICTION COEFFICIENT.
Mazalov, A. B. Development of an effective mode of fusion of the metal-powder composition PR-12Kh18N10T / A. B. Mazalov, D. E. Silyutin, L. S. Zelenina, E. P. Endaltsev // Voronezh Scientific and Technical Bulletin. - 2021. - V. 4, No. 4 (38). - S. 21-28. Access mode: http://vestnikvglta.ru/arhiv/2021/4-4-38-2021/21-28.pdf - Head. from the screen. – DOI: 10.34220/2311-8873-2022-21-28.
Annotation. The use of a metal-powder composition of steel with additions of chromium and nickel 12Kh18N10T for use in additive 3D printing technologies by selective laser melting (SLM) is considered. The influence of the laser radiation power and the scanning speed of the laser beam on the continuity of the resulting steel in the samples has been studied. features of material formation in the process of selective laser metal fusion, technological features of the equipment are determined. The results on the physical and mechanical properties of the alloy obtained by SLM were obtained: the ultimate strength of the samples after hardening at a temperature of 105010 0С - 660 MPa; yield strength - 356 MPa, relative elongation - 40%.
Keywords: ADDITIVE TECHNOLOGIES, SELECTIVE LASER FUSION, METAL POWDER COMPOSITION, ALLOY 12Kh18N10T, MECHANICAL PROPERTIES
Boldyrev, A. A., Levin D. Yu., Ryabinina O. A., A. I. Boldyrev, A. A. Boldyrev, D. Yu. Levin, O. A. Ryabinina, A. I.
Annotation. The paper considers the features of designing structures using generative design; the software was analyzed taking into account the different production manufacturability of the design results; formulated technological recommendations for blank production, as well as for subsequent machining; to fix workpieces of complex shape on the machine, it is proposed to use tooling using magnetic fluids.
Key words: GENERATIVE DESIGN, MANUFACTURING PRODUCT DESIGN, ADDITIVE TECHNOLOGIES, MECHANICAL PROCESSING, MAGNETIC FLUID.
Smolentsev, E. V. Designing the technology of hole punching by combined methods / E. V.
Annotation. The article discusses the design of a combined processing process with the imposition of electromagnetic fields based on a previously developed methodology. The advantages of this approach to the creation of new methods for processing parts are shown, confirmations are given in the form of theoretical calculations and the results of the practical application of a new method of piercing holes.
Keywords: EDM, ELECTROCHEMICAL, METHODOLOGY, PERFORMANCE.
Kozlov, A. A. Development of a diagnostic system for CNC machine tools / A. A. Kozlov, A. M. Kozlov // Voronezh Scientific and
Annotation. The article describes the principles of creating a hybrid model for predicting and complex diagnostics of malfunctions of CNC machine tools. It is proposed to improve the configuration of the diagnostic system and include a neuro-fuzzy network with a dynamic Bayesian network algorithm and a particle filter in it to ensure earlier and more accurate prediction of faults. This will allow some failures to be predicted in the early stages of CNC machine operation, when cost-effective measures can be taken to avoid serious failures or damage.
Keywords: CNC MACHINE, FAULT, COMPREHENSIVE DIAGNOSTICS AND PREDICTION, EXPERT SYSTEM.
Tamarkin, M.A., Kolganova E.N., Lebedev V.A., Shishkina A.P. Efficiency of using granular media from natural materials for vibrofinishing of parts of radio-electronic equipment // Voronezh Scientific and Technical Bulletin. - 2021. - V. 4, No. 4 (38). – S. 59-69. Access mode :http://vestnikvglta.ru/arhiv/2021/4-4-38-2021/59-69.pdf - Head. from the screen. – DOI: 10.34220/2311-8873-2022-59-69.
Annotation. The article discusses the features of the granulometric characteristics of processing media from natural materials and their influence on the quality of finishing processing of parts of radio-electronic equipment under vibration processing conditions. It is shown that the presence of wedge-shaped vertices different in size and angular arrangement relative to each other makes it possible to consider the granule as a tool that performs cutting and has access to various surfaces of the workpiece. Recommendations on the choice of granulometric characteristics of processing media are proposed.
Keywords: VIBRATION TREATMENT, NATURAL PROCESSING ENVIRONMENTS, SURFACE QUALITY.
Operation of road transport
Posmetiev, V. I., Nikonov V. O., Sizmin I. V. Improving the efficiency of a timber road train by using a recuperative pneumatic-hydraulic coupling device // Voronezh Scientific and Technical Bulletin. - 2021. - V. 4, No. 4 (38). - S. 70-85. Access mode: http://vestnikvglta.ru/arhiv/2021/4-4-38-2021/70-85.pdf - Head. from the screen. – DOI: 10.34220/2311-8873-2022-70-85.
Annotation. The necessity of using logging vehicles with trailers in order to increase the productivity of timber hauling is substantiated. The advantages of using logging vehicles with trailers over single logging vehicles are described. The analysis of scientific works of foreign authors in the field of increasing the efficiency of timber trucks with trailers is carried out. An assessment was made of the operation of timber trucks with trailers in the existing conditions for the removal of timber in the Russian Federation. Identified negative factors limiting the effectiveness of timber road trains. The most significant factor is singled out, which can lead to dangerous consequences, which consists in the occurrence of critically large forces in the coupling device of a logging road train during sudden braking. The change in the braking forces of the bridges of a timber vehicle with a trailer during sharp braking, as well as three possible cases of interaction during braking of a timber vehicle with a trailer, is considered. A promising design of a recuperative pneumohydraulic coupling device for a logging vehicle with a trailer is proposed.
Keywords: TIMBER CAR, TRAILER, PNEUMO-HYDRAULIC COUPLING DEVICE, ENERGY RECOVERY, EFFICIENCY, FOREST ROAD, BRAKING PROCESS.
Posmetiev, V. I. Evaluation of the effectiveness of a promising combined technology for the restoration of necks
Annotation. The negative consequences of the operation of timber road trains in difficult road and climatic conditions are considered. It has been established that the largest share of failures during the operation of a timber road train fit on his engine. Possible defects of the crankshaft, which contribute to the failure of the engine of a logging road train, are described. The expediency of the process of restoration of crankshafts of engines is substantiated. The analysis of the results of research by foreign authors in the field of development and improvement of various methods for the restoration of the main and connecting rod journals of the crankshafts of engines is carried out. Among them, the most progressive method of restoration was revealed, which consists in the plasma deposition of coatings of specified properties on the main and connecting rod journals of the crankshafts. In order to increase the efficiency of the resulting coatings by plasma spraying, a combined method for the simultaneous deposition and hardening of the coating is proposed. A preliminary assessment was made on the basis of mathematical modeling of the main physical and mechanical properties of coatings obtained using this technology. The wear resistance of coatings obtained on the developed laboratory installation using compared technologies has been studied.
Keywords: TIMBER ROAD TRAIN, TIMBER ROAD, COMBINED RESTORATION TECHNOLOGY, PLASMA SPRAYING, COATING, ENGINE, CRANKSHAFT JOINTS, ELECTROMECHANICAL PROCESSING.
Nikonov, V. O. Results of the study of the movement of a road train equipped with a fifth wheel coupling with a spring shock absorber / V. O. Nikonov, V. I. Posmetiev, V. V. Posmetiev // Voronezh Scientific and Technical Bulletin. - 2021. - V. 4, No. 4 (38). - S. 102-120. Access mode: http://vestnikvglta.ru/arhiv/2021/4-4-38-2021/102-120.pdf - Head. from the screen. – DOI: 10.34220/2311-8873-2022-102-120.
Annotation. Based on the analysis of scientific works of foreign authors, the main factors influencing the efficiency of the operation of timber tractors with semi-trailers have been identified. A promising design of a fifth wheel coupling with a spring shock absorber for timber tractors with semi-trailers that haul timber in difficult road conditions is proposed. A mathematical model of the movement along a logging road of a logging tractor with a semi-trailer equipped with a fifth wheel coupling with a spring shock absorber has been developed. Based on the developed computer program, a preliminary assessment of the performance indicators of the proposed design of the coupling device was carried out. It has been established that the spring shock absorber of the fifth wheel coupling provides, during braking and acceleration, a decrease in the amplitude of acceleration oscillations between a timber tractor and a semi-trailer with timber in the range from 0.95 to 0.6 m/s2. It was found that in order to reduce unfavorable vibrations of a semi-trailer with timber relative to a timber tractor, it is advisable to use dry friction in a spring shock absorber.
Key words: SPRING SHOCK ABSORBER, TIMBER TRACTOR, MOTION, FITCH, SEMI-TRAILER, ACCELERATION, TIMBER, SLOWING, TIMBER ROAD.