VORONEZH SCIENTIFIC AND TECHNICAL
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
/ M. Sh. Kh. Al-Bdeyri, V. V. Krasilnikov, A. M. Kadyrmetov, S. V. Sergeev // Voronezh Scientific and Technical Bulletin. - 2021. - V. 4, No. 4 (38). - S. 12-20. Access mode: http://vestnikvglta.ru/arhiv/2021/4-4-38-2021/12-20.pdf - Head. from the screen. – DOI: 10.34220/2311-8873-2022-12-20.
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.
Boldyrev // Voronezh Scientific and Technical Bulletin. - 2021. - V. 4, No. 4 (38). - S. 29-35. Access mode: http://vestnikvglta.ru/arhiv/2021/4-4-38-2021/29-35.pdf - Head. from the screen. – DOI: 10.34220/2311-8873-2022-29-35.
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.
Keywords: 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.
Smolentsev, Yu. S. Zolototrubova, V. G. Gritsyuk // Voronezh Scientific and Technical Bulletin. - 2021. - V. 4, No. 4 (38). - S. 36-50. Access mode: http://vestnikvglta.ru/arhiv/2021/4-4-38-2021/36-50.pdf - Title. from the screen. – DOI: 10.34220/2311-8873-2022-36-50.
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
technical bulletin. - 2021. - V. 4, No. 4 (38). - S. 51-58. Access mode: http://vestnikvglta.ru/arhiv/2021/4-4-38-2021/51-58.pdf - Head. from the screen. – DOI: 10.34220/2311-8873-2022-51-58.
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
of crankshafts of engines of timber road trains / V. I. Posmetiev, A. M. Kadyrmetov, V. O. Nikonov //
Voronezh Scientific and Technical Bulletin. - 2021. - V. 4, No. 4 (38). - S. 86-101. Access mode: http://vestnikvglta.ru/arhiv/2021/4-4-38-2021/86-101.pdf - Head. from the screen. – DOI: 10.34220/2311-8873-2022-86-101.
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.
Keywords: SPRING SHOCK ABSORBER, TIMBER TRACTOR, MOTION, FITCH, SEMI-TRAILER, ACCELERATION, TIMBER, SLOWING, TIMBER ROAD.