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CONSTRUCTIONAL MATERIALS, PHYSICAL METALLURGY

Shchitov N. N., Lozovan А. А. — Pyrolytic chromium carbide coatings — a type or component of multilayer functional coatings

The revue of multilayered functional coatings concepts is presented and pyrolytic chromium carbide coatings designed for corrosion and wear protection are among them.
They may serve too as one of other functional layers deposited by the known physical, in particular ion-plasma method. Such integration may be realized in modular conveyor units. The multilayered coatings geometric parameters optimization is to be made on the basis of the optimal control theory.
Key words: multilayered functional coatings, pyrolytic chromium carbide coatings, optimal control theory, corrosion resistance, wear resistance

TECHNOLOGIES AND EQUIPMENT OF MECHANICAL, PHYSICOTECHNICAL PROCESSING, PRESSURE TREATMENT

Krivoshapko S. N. — About parabolic bending of a flat metal sheet into a torso structure

The review article contains information on the use of thin-walled torso structures, their shaping by using parabolic bending of thin flat metal sheets or initial torso blanks, the technology of their bending, taking into account the physical and mechanical characteristics of the material and determining the stress-strain state in the finished torso product obtained during the parabolic bending process. The information given in the article primary sources and references to the literature is bolstered with, where the derivation of the formulas presented in the article are given, which are confirmed by numerical and field experiments. It noted that all theorems and propositions related to parabolic bending of torso surfaces attitudes to real torso products only approximately.
The purpose of the article is to familiarize engineers and designers who design and manufacture torso structures in nature by the method of parabolic bending of a metal sheet blank with the theoretical research results of this process. Methods for bending research grounded mainly on the principles of differential geometry, shell structural mechanics and the plasticity theory.
Key words: torso surface, parabolic bending, shaping of torsos, unfolding helicoid, conical helicoid, bending of a metal sheet, straight bending with large deformations, plastic forming, elastic deformations, torso structure, structural mechanics of shells, theory of plasticity

Erenkov O. Yu., Lopushanskiy I. Ya., Yavorskaya E. V., Yavorskiy D. O. — Investigation of caprolon turning by using a lubricating and cooling technological medium

The article presents the results of experimental studies of caprolon turning with the cutting fluid use. It is scientifically substantiated the use of an aqueous emulsion with the addition of a water repellent during caprolon turning as a cutting fluid. On this basis a new method for turning caprolon blanks was developed and patented. An experimentally established fact is that the water absorption capacity of caprolon is reduced in the case of its turning with the feeding of an aqueous emulsion of potassium palmitate to the cutting zone. In this case, the turning of caprolon in the traditional way leads to the activation of the process of water absorption. It has been experimentally proved that caprolon turning with the feeding of an aqueous emulsion of potassium palmitate into the cutting zone provides a better machined surface of the part in comparison with the traditional method of turning. This is evidenced by a more uniform deviation profile of the depressions and protrusions of the treated surface and the numerical values of the roughness parameters.
The results of microstructural studies of caprolon shavings are presented. It has been established experimentally that turning caprolon using an aqueous emulsion of potassium palmitate promotes the formation of continuous drainage chips. Turning caprolon in the traditional way leads to the formation of articular shavings.
Key words: caprolon, turning, water absorption, water-repellent emulsion, roughness, chip formation

MACHINE-ASSEMBLING PRODUCTION

Torpachev A. V. — Ensuring and control of assembly and docking operations for aerospace equipment at preparation for launch

A study of requirements aimed at increasing the efficiency and reducing the resource intensity of the processes of assembly and docking of products. Mathematical models are proposed to identify and improve the reliability characteristics of aerospace products during their pre-launch preparation.
Key words: assembly and docking of products, aerospace engineering, pre-launch preparation

TECHNOLOGIES AND MACHINES FOR WELDING PRODUCTION AND RELATED PROCESSES

Lyushinskiy A. V., Umerov R. A. — Diffusion welding of copper to silver

Studied features forming of compounds copper from nickel and silver at different options regimes of diffusion welding. Investigated distribution element at zone contact at diffusion exchange this element. Identified value diffusion zones welded compounds, responsible, at end eventually, behind their quality. Established best options diffusion welding.
Key words: diffusion welding, welding joint, cooper, silver, mechanical durable

Volkov S. S., Remizov A. L., Pankratov A. S., Kobernik N. V. — The influence of thermal deformation processes on the weldability of ABS plastic by ultrasound

The mechanism of formation of ABS plasticswelded joints by ultrasonic welding is considered. It is shown that when a certain combination of modes for ABS plasticultrasonic welding speed deformation at high pressures may be greater than at small ones, due to the competition of four factors: temperature, static pressure, concentration of energy on the welding surfaces and the separation of the waveguide from the surface of the welded material.
Key words: ultrasonic welding, amplitude of oscillation, thermal cycle, static welding pressure, the working end of the waveguide, welding joint

SPECIAL TECHNOLOGY

Ponamarev K. Е., Strelnikov I. V., Antonov А. А., Kapustin О. Е. — Analysis of various types vibration processing of aluminum welded structures

Responsible welded structures that have sufficient accuracy after machining, as a result of natural aging, may receive unacceptable changes in geometric dimensions and shape. Heat treatment is a traditional technology that provides forced accelerated relaxation of residual stresses. Currently, as an alternative, advanced vibration processing technology is being introduced into the industry. This technology has its advantages of efficiency, minimal energy consumption, short technological cycle time and environmental friendliness. However, given the variety of methods of vibration processing, the question of their optimal application remains open. To solve this problem, an assessment of the effectiveness of various methods of vibration treatment of welded joints of aluminum alloys, both in terms of the values of residual stresses, and the manufacturability of performance and control capabilities.
Key words: vibration welding process (vibration accompanying welding), post-weld vibration treatment, arc welding, residual stresses, residual deformations, laser interferometry, laser 3D-scanning, inflexibility

Torpachev A. V. — Investigation of complex reliability indicators as an example of readiness factor for operation of technological equipment of aerospace systems

The article examines one of the main complex indicators of reliability during operation — the coefficient of readiness for operation of aerospace technological equipment. The output and analysis of the ready to work function and the readiness coefficient are performed.
Key words: characteristic of reliability, the coefficient of readiness for operation, aerospace systems

METHODS OF CONTROL AND DIAGNOSTICS

Larchenko A. G., Filippenko N. G. — High-frequency diagnostics of engineering products from polymer materials

The paper discusses the application area of products from polymer materials. The existing problems of diagnostics technological operations and improvement of the polymers operational properties are described. The goal of the article: to develop a method for detecting defects in polymer products by the method of high-frequency radiation, and to implement this control technique within the framework of the production process also. By analyzing literary sources, research works in this area, experimental studies this goal is achieved. The paper presents a method for diagnosing polymer products by the method of high-frequency radiation, describes the main control parameters and the coercion. A description of the diagnostic device developed within the framework of the study is given. A control algorithm and the results of experimental tests are presented. The created mathematical model of the high-frequency currents influence on a polymer product is described.
A software complex based on a mathematical model is presented that allows not only to implement the process in the automation mode, but also to study the effect of a high-frequency electric field.
Key words: quality improvement, non-destructive testing, polymer products, diagnostics, flaw detection

MATHEMATICAL MODELING, NUMERICAL METHODS, PROGRAM COMPLEXES

Yangirov I. F., Safiullin R. A., Mukhametshin A. V. — Model of a spiral electromechanical transducer taking into account the main mechanical and electrical parameters

In article the mathematical model of the spiral electromechanical converter in a subharmonic mode with experimental acknowledgement is resulted. Article is useful to the engineers who are engaged in designing and operation of vibrating cars.
Key words: the spiral electromechanical converter, subharmonic fluctuations

ECONOMY AND ORGANIZATION OF PRODUCTION

Machmudov R. Sh. — Application of cyber-physical systems in the oil and gas industry: prospects and problems

The technological capabilities created by the 4-th industrial revolution determine the transition to a new quality level in all spheres of economic activity. The oil and gas industry is one of the most promising areas for cyber-physical systems application, which use revolutionary new technologies. The successful application of cyber-physical systems in this area implies increased efficiency, productivity and security. The article discusses the essence and features of cyber-physical systems, the prospects for their application in the oil and gas industry. The features and advantages of using cyber-physical systems in all processes and at all stages of the oil and gas industry are shown. Examples of the cyber-physical systems usage in the process of extracting hydrocarbon resources by the world's leading oil and gas companies are given. The problems associated with the use of cyber-physical systems in the oil and gas industry are identified also, and ways to solve them are shown.
Key words: oil and gas industry; 4-th industrial revolution; cyber physical systems; Industry 4.0

FOREIGN EXPERIENCE

Potapova G. S. — Content of foreign journals

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