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TECHNOLOGY AND MACHINES

DOI: 10.34641/TM.2022.243.9.057
Yangirov I. F., Khalikov A. R., Fedosov E. M. — Experimental studies of an electromechanical vibration converter with a spiral closed secondary element 

For the first time, a physical model in the form of an electromagnetic cannon is proposed for the study of electromechanical vibration transducers with a spiral secondary element.
The development of a research stand for obtaining mechanical characteristics of an electromechanical vibration transducer (EMVP) with a spiral secondary element presents certain technical difficulties, which can be avoided by using a physical model and obtaining the necessary experimental data for conducting scientific work.
Key words: electromagnetic gun, short-circuited coil, vibration converter, spiral spring, mechanical characteristic

TECHNOLOGY AND EQUIPMENT OF MECHANICAL AND PHYSICAL-TECHNICAL PROCESSING

DOI: 10.34641/TM.2022.243.9.058
Golovkin P. A. — Ensuring the vacuum density of the housings of microassemblies of electronic devices made of aluminum-magnesium alloys at the stage of mechanical processing 

The influence of the scheme of milling workpieces from hot-rolled plates of aluminium-magnesium alloys on the quality of the material of the surface layer of parts of vacuum- tight housings of electronic microwave devices is studied.
It is shown that when milling along a trochoidal trajectory, due to the stability of the cutting regime, the smallest spread of the surface energy of the material is achieved, which ensures its good resistance to corrosion processes and uniform nickel plating before soldering-assembly of the device body. So on the basis of a synergetic approach, at the stage of mechanical processing, a given vacuum density of the microassembly bodies is provided.
Key words: microassemblies, aluminum alloy, intermetallic phases, machinability, milling, technological schemes, surface quality, load, unloading impact, surface energy, corrosion processes, vacuum density, chemical nickel plating, soldering-assembly

DOI: 10.34641/TM.2022.243.9.059
Asaev A. S., Ivanaisky A. V., Bondarenko A. P. — Study of the process of finishing abrasive treatment of gears using the effect of vortex cavitation

A significant reserve for increasing labor productivity in manufacturing is represented by parts with an accuracy quality of seventh and below, having a complex surface profile. The technological processes of their production are multi-step and involve labor-intensive finishing operations. This article raises the question of increasing the efficiency of finishing treatment of gears with a radial longitudinal profile line (hypoid gears) and presents a method of finishing treatment with a free abrasive using the effect of vortex cavitation.
Key words: finishing, surface quality, efficiency increase, cavitation

MATHEMATICAL MODELING, NUMERICAL METHODS, SOFTWARE PACKAGES

DOI: 10.34641/TM.2022.243.9.060
Hasanov Z. A., Khanakhmedova S. A. — Some issues of modeling the process of smooth start of an asynchronous electric drive 

The process of soft start of an asynchronous electric drive is modeled in the MATLAB/Simulink environment, using voltage regulators. The dynamic characteristics of an asynchronous motor powered by a voltage source network are investigated using vector systems on a coordinate system rotating at synchronous speed. The obtaine a simulation results, it possible to investigate various types of asynchronous electric motors, taking into account the smooth change of the input voltage and the regulation of the inrush current.
Key words: asynchronous electric drive, model of the asynchronous motor start-up process, direct start, voltage regulator, starting current

WELDING, RELATED PROCESSES AND TECHNOLOGIES

Mishigdorzhiyn U. L., Ulukhanov N. S., Semenov A. P., Milonov A. S., Dashiev D. E., Gulyashinov P. A. — Electron beam alloying of low-carbon steel with boron carbide and aluminum

The effect of electron-beam alloying (EBА) with boron carbide and aluminum on the microstructure, composition and microhardness of the surface layer of low-carbon steel St3 is shown. EBA led to the formation of a coating with a thickness of up to 0.3 mm with a predominant dendritic structure. The maximum microhardness in the layer was 670 HV, which significantly exceeds the hardness of the base metal. XRD analysis revealed the presence of iron boride and carbide on the surface of St3 steel.
Key words: electron beamalloying, borides, carbides, low-carbon steel, microstructure, microhardness

METHODS AND DEVICES FOR MONITORING AND DIAGNOSTICS OF MATERIALS, PRODUCTS

DOI: 10.34641/TM.2022.243.9.061
Torpachev A. V. — Research of control methods oxygen concentrations in the air environment of premises and structures used in space engineering

A comparative study of the most common methods for measuring the oxygen concentration in the air environment of premises and structures of space complexes is carried out. The thermomagnetic method of gas control is selected and its characteristic disadvantages leading to a decrease in the efficiency of application are considered. Methods for reducing measurement errors and accelerating the output of gas analyzers to the operating mode are proposed.
Key words: oxygen concentration, monitoring sensors, reduction of errors, measurement mode

DESIGN, CONSTRUCTION AND PRODUCTION OF AIRCRAFT

DOI: 10.34641/TM.2022.243.9.062
Kruglov I. A., Kurkin A. A. — The main directions of work on the technology of creating new orbital stations

The paper presents topical issues on the implementation of promising tasks facing the manned program of the Russian Federation, in near-Earth orbit and for the development of the Moon from the point of view of mechanical engineering technologies as a specialty of the Higher Attestation Commission. The main directions of work are considered, tasks on new technologies, reduction of development cycles, reduction of production costs and areas of standardization work are formulated.
Key words: orbital station, mechanical engineering technology, efficiency improvement, reliability of materials, control, regulatory framework

PRODUCT QUALITY MANAGEMENT. STANDARDIZATION. ORGANIZATION OF PRODUCTION

DOI: 10.34641/TM.2022.243.9.063
Bukhalkov M. I., Safronov E. G. — Methods of increasing the efficiency of depreciation and use of technological equipment at enterprises of the machine-building complex

The mechanism of effective depreciation of fixed assets is considered, its economic essence at modern domestic enterprises is revealed. Scientific recommendations on the substantiation and development of an effective depreciation policy at processing enterprises of the country's machine-building complex are given, practical examples of calculating standard depreciation deductions by various economic methods for a period from one to five years are presented.
Key words: depreciation of fixed assets, technological equipment, machine-building enterprise, depreciation policy, norms and depreciation object, depreciation funds and benefits, methods of effective depreciation

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