1_2023_sen_8

Title of the article RELAXATION OF RESIDUAL STRESSES DURING COOLING OF A WORKPIECE WITH A COATING APPLIED BY CENTRIFUGAL INDUCTION SURFACING METHOD
Authors

SOSNOVSKY Igor A., Senior Researcher of the Laboratory of Gas-Thermal Methods of Machine Component Hardening of the R&D Center “Mechanical Engineering Technologies and Processing Equipment”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

BELOTSERKOVSKY Marat A., D. Sc. in Eng., Prof., Head of the Laboratory of Gas-Thermal Methods of Machine Component Hardening of the R&D Center “Mechanical Engineering Technologies and Processing Equipment”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

KURILYONOK Artem A., Ph. D. in Eng., Senior Researcher of the Laboratory of Gas-Thermal Methods of Machine Component Hardening of the R&D Center “Mechanical Engineering Technologies and Processing Equipment”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

KOMAROV Aleksandr I., Ph. D. in Eng., Head of the Laboratory of Modification Techniques of Structural Materials of the R&D Center “Mechanical Engineering Technologies and Processing Equipment”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

ORDA Dmitriy V., Researcher of the Laboratory of Modification Techniques of Structural Materials of the R&D Center “Mechanical Engineering Technologies and Processing Equipment”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.
In the section MECHANICAL ENGINEERING MATERIALS AND TECHNOLOGIES
Year 2023
Issue 1(62)
Pages 55–62
Type of article RAR
Index UDK 621.793
DOI https://doi.org/10.46864/1995-0470-2023-1-62-55-62
Abstract As a result of a theoretical analysis of the cooling process of parts with deposited coatings applied by the method of centrifugal induction surfacing, the patterns of formation of residual stresses are established, taking into account relaxation. It is shown that a decrease in the cooling rate after surfacing makes it possible to reduce the level of residual stresses due to the relaxation phenomenon. Calculation relations are derived that allow predicting the permissible value of residual stresses depending on the required adhesive strength. As the analysis of the ratios obtained shows, the reduction of residual stresses in the resulting coatings due to their relaxation can be achieved by reducing the cooling rate or, accordingly, increasing its time. In the technological process of induction surfacing, a two-stage cooling mode of the workpiece was used; at the first stage, cooling is carried out at the maximum possible rate. If the temperature stresses reach the maximum allowable value τmax, the pairing condition for the transition from the previous cooling stage to the next one is the equality τmax = τi, where τi is determined from the equations derived in the work. In this case, one should be guided by the observance of the condition τi < τc, where τc is the theoretical adhesive strength of coatings in the absence of residual stresses. An example of the practical use of the twostage cooling after the process of applying coatings by centrifugal induction surfacing on the bushings of tamping blocks of a STS track machine is given.
Keywords coatings, residual stresses, relaxation, centrifugal induction surfacing, adhesion strength, bimetallic parts, tamping block bushings, STS track machine
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Bibliography
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1_2023_sen_7

Title of the article METHOD FOR SELECTING THE FUNCTIONING MODES OF THE CARRIAGE DRIVE OF PROBE EQUIPMENT DURING TRANSIENT PROCESSES. PART 2
Authors

KOZINETS Alexei V., Engineer, Planar JSC, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

BASINIUK Vladimir L., D. Sc. in Eng., Prof., Chief of the R&D Center “Mechanical Engineering Technologies and Processing Equipment” – Head of the Laboratory of Gearing Systems and Processing Equipment, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

VOLKOTRUB Rita E., Researcher of the Laboratory of Gearing Systems and Processing Equipment of the R&D Center “Mechanical Engineering Technologies and Processing Equipment”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.
In the section MECHANICAL ENGINEERING COMPONENTS
Year 2023
Issue 1(62)
Pages 47–54
Type of article RAR
Index UDK 621.81
DOI https://doi.org/10.46864/1995-0470-2023-1-62-47-54
Abstract The article presents the results of studies, the analysis of which made it possible to identify features that affect the duration of the main periods of horizontal movement by the carriage drive with the object stage of the probe control equipment, the main of which include the mode of smoothness (dynamics) of movement and the accelerations associated with it during acceleration and braking, provided by the setting of the motor controller, as well as the step of displacement. It is shown that for specific inertia-stiffness and damping characteristics of the probe control equipment, the determination of accelerations for each mode of smoothness and duration of damping of mechanical oscillations after the carriage with the object stage moves to a given coordinate can be carried out in the debug mode of the probe control equipment or automatically using adaptive control. A method is proposed for selecting rational operating modes for the carriage drive with an object stage of probe equipment during transient processes using a database and a displacement step (of crystal size), which makes it possible for each smoothness mode to determine the cyclogram of its displacement and the total duration of the entire cycle, from which the minimum cycle is selected and implemented.
Keywords probe equipment, method, microelectronics, transient processes, performance
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1_2023_sen_5

Title of the article OPERATIONAL LIFE ASSESSMENT OF PLANETARY GEARBOX OF HYDROMECHANICAL TRANSMISSION OF MINING DUMP TRUCK ACCORDING TO THE RESULTS OF FORCED BENCH TESTS
Authors

ISHIN Nikolay N., D. Sc. in Eng., Assoc. Prof., Chief of the R&D Center “Mining Machinery”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

GOMAN Arkadiy M., Ph. D. in Eng., Assoc. Prof., Head of the Department of Dynamic Analysis and Vibration-based Diagnostics of Machines of the R&D Center “Mining Machinery”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

SKOROKHODOV Andrey S., Ph. D. in Eng., Leading Researcher of the Department of Dynamic Analysis and Vibration-based Diagnostics of Machines of the R&D Center “Mining Machinery”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

SHPORTKO Vladimir V., M. Sc. in Phys. and Math., Researcher of the Department of Dynamic Analysis and Vibration-based Diagnostics of Machines of the R&D Center “Mining Machinery”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

SHYSHKO Sergei A., Deputy Chief Designer – Head of the Department of Mechanical Transmissions, OJSC “BELAZ” – Management Company of Holding “BELAZ-HOLDING”, Zhodino, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

REGINJA Vladimir V., Ph. D. in Eng., First Category Design Engineer of the Design Bureau of Hydromechanical Transmissions, OJSC “BELAZ” – Management Company of Holding “BELAZ-HOLDING”, Zhodino, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

KORNACHENKO Dmitry I., First Category Design Engineer of the Design Bureau of Hydromechanical Transmissions, OJSC “BELAZ” – Management Company of Holding “BELAZ-HOLDING”, Zhodino, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.
In the section DYNAMICS, DURABILITY OF VEHICLES AND STRUCTURES
Year 2023
Issue 1(62)
Pages 31–38
Type of article RAR
Index UDK 621.833.65: 539.43
DOI https://doi.org/10.46864/1995-0470-2023-1-62-31-38
Abstract The aim of this work is to assess the compliance of the estimated lifetime of the planetary gearbox of hydromechanical transmission of a BELAZ mining dump truck with the actual operational one based on the results of accelerated (forced) bench tests. Preliminary strength calculations were carried out for the two most stressed modes of movement of a mining dump truck in a quarry on the rise, where the most significant damage to gear trains takes place: for maximum productivity (power) and maximum torque. Investigations showed that the gears limiting the lifetime of the gearbox are the sun gear and satellites of the 3rd planetary series. As a result of the tests, the estimated operating time of the planetary gearbox on the bench was achieved, which guarantees an operational life of at least 400,000 km of the dump truck run.
Keywords mining dump truck, planetary gearbox, gear train, accelerated bench tests, forced mode, operational life
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1_2023_sen_6

Title of the article EXPERIMENTAL RESEARCH OF DYNAMIC PARAMETERS OF A TIRE FOR HIL-TESTING OF VEHICLE ACTIVE SAFETY SYSTEMS
Authors

TOROPOV Evgenii I., Senior Lecturer of the Department “Automotive Transport”, Nizhny Novgorod State Technical University n.a. R.E. Alekseev, Nizhny Novgorod, Russian Federation, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

VASHURIN Andrei S., Ph. D. in Eng., Associate Professor of the Department “Automobiles and Tractors”, Nizhny Novgorod State Technical University n.a. R.E. Alekseev, Nizhny Novgorod, Russian Federation, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

BUTIN Danila A., Senior Lecturer of the Department “Automobiles and Tractors”, Nizhny Novgorod State Technical University n.a. R.E. Alekseev, Nizhny Novgorod, Russian Federation, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

STEPANOV Evgenii V., Senior Lecturer of the Department “Automobiles and Tractors”, Nizhny Novgorod State Technical University n.a. R.E. Alekseev, Nizhny Novgorod, Russian Federation, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.
In the section MECHANICAL ENGINEERING COMPONENTS
Year 2023
Issue 1(62)
Pages 39–46
Type of article RAR
Index UDK 629.113
DOI https://doi.org/10.46864/1995-0470-2023-1-62-39-46
Abstract This publication presents the specialists’ experience of Nizhny Novgorod State Technical University n.a. R.E. Alekseev (NNSTU) in the field of studying the friction-rolling of an automobile wheel on an asphalt surface. Adequate mathematical reproduction of force reactions that occur in the contact patch plays a significant role in modeling vehicle dynamics. Since the fundamental description of this interaction is difficult, in engineering practice the empirical method has become popular, which consists in obtaining an experimental data array with its subsequent trigonometric approximation and systematization. NNSTU specialists have developed a test methodology and carried out full-scale tests using a specialized road tire trailer bench. The experiment was carried out on a dry asphalt pavement with a coefficient of adhesion of about 0.4–0.8 at an ambient temperature of 20 °С. The resulting array of experimental data is processed and presented in the form of a trigonometric digital model PAC 2002. The maximum discrepancy between theoretical and experimental data in absolute value doesn’t exceed 5 %.
Keywords tire test bench, wheel slip, braking, magic formula, tests, friction coefficient, road surface
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1_2023_sen_4

Title of the article STRUCTURAL ANALYSIS AND BALANCING OF THE RECIPROCATING MOTION MECHANISM
Authors

PRIKHODKO Aleksandr A., Ph. D. in Eng., Associate Professor of the Technical Mechanics and Special Machines Department named after Prof. A.A. Petrik, Kuban State Technological University, Krasnodar, Russian Federation, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

MOVSISYAN Mger N., Postgraduate Student of the Technical Mechanics and Special Machines Department named after Prof. A.A. Petrik, Kuban State Technological University, Krasnodar, Russian Federation, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.
In the section DYNAMICS, DURABILITY OF VEHICLES AND STRUCTURES
Year 2023
Issue 1(62)
Pages 23–30
Type of article RAR
Index UDK 621.833.51
DOI https://doi.org/10.46864/1995-0470-2023-1-62-23-30
Abstract The paper presents new mechanisms of reciprocating motion, built on the basis of a two-row planetary gear with non-circular gearwheels with two external gears. The desired type of the output link motion is realized by converting the rotationally reciprocating movement of the planetary mechanism output shaft using the transmission “toothed wheel — toothed rack”. The proposed mechanisms are balanced on the example of three planetary gear schemes, with one, two and three satellites. Structural analysis of gears with multiple satellites has shown that the addition of each extra satellite takes away one degree of freedom from the mechanism, as a result of which it becomes immobile. It is proposed to use a counterweight on each additional satellite instead of one two-moving kinematic pair, which leads to the elimination of redundant links. The conditions of static equilibrium for the developed schemes of planetary mechanisms are obtained, which make it possible to locate the centers of mass of the mechanisms on the axis of rotation and thereby significantly reduce noise and vibration in the gear developed on its basis.
Keywords planetary mechanism, structural analysis, structural mathematical model, static balancing, reciprocating motion
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