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CONSTRUCTIONAL MATERIALS, PHYSICAL METALLURGY

Sokolovskiy M. I., Shaydurova G. I., Buzmakova N. M. — Thermal destruction of fiberglass materials for rocket engine components on solid fuel (RESF)

There were studied thermal destruction processes in SRM glass-fiber components including derivative and X-ray analysis.
There were revealed two main processes during pyrolysis of glass plastics: 1) decomposition of fiber plastics with gaseous products release; 2) structural changes in material — transfer from amorphous state to micro-crystal structure.
Analysis of available results permits to develop technology based on double-stage heating of glass plastics by pyrolysis with formation of micro-crystal fibers practically used for manufacture of glasses with various composition and their products for various application.
Key words: derivative analysis, glass plastic, thermal destruction, X-ray analysis

TECHNOLOGIES AND EQUIPMENT FOR MECHANICAL AND PHYSICO-TECHNICAL PROCESSING, PRESSURE TREATMENT

Chernyaev A. V., Gladkov V. A., Chudin V. N. — Forming by pressure of annular ribs on a pipe

A technological scheme and relationships for calculating the modes of isothermal extrusion of circular strengthening rib on a pipe are proposed. The hot material in zone of deformations is accepted visco-plastic. The energy method is used in relation to axisymmetric velocity field of displacements. The calculated results are given. The samples of products are presented.
Key words: extrusion, visco-plastic material, power, pressure, denseness, damageability of material

TECHNOLOGIES AND MACHINES FOR WELDING PRODUCTION AND RELATED PROCESSES

Shiganov I. N., Kuleshov S. S., Smirnova N. A. — The use of laser volumetric deposition manufacture for the products from aluminum alloys

The possibility of manufacturing parts from aluminum alloys at the domestic powder coaxial laser surfacing plant KLP-400 was studied. The optimal ranges of the modes for making 3-dimensional parts using layer-by-layer laser cladding with powder-based alloy AlSi10Mg. The study of hardness of the obtained material and metallographic study of the structure of the resulting parts.
Key words: additive manufacturing, coaxial laser melting, direct metal deposition, laser cladding, aluminum alloy

Poletaev Yu. V., Poletaev V. Yu., Shchepkin V. V. — Friction welding of connectors and nipples from low-alloy steel 15Х2NМFА

The purpose of this work is research and development of technology of friction welding instead of manual arc welding with coated electrode, fittings and pipes shell-type equipment of power plants of steel 15X2NMFA. Manual arc welding method does not provide a stable quality of welded joints. The solution to this problem is possible through the use of friction welding process fittings and pipes of small diameter. Given the lack of theoretical and experimental exploration of issues were raised and resolved the following scientific and technical tasks: developed by making constructive models and connected (cone) surfaces of the fittings (diameter up to 40 mm) and pipes (diameter up to 80 mm); choice of optimum training grounded corners conical surfaces to be welded; justified the choice of optimum welding parameters values; quality assessment of welded joints by non-destructive and destructive methods. Effect of constructive and technological factors on the quality of welded joints. Received the positive results of the pilot study confirmed the technological feasibility of friction welding fittings and pipes of small diameter low-alloy steel 15X2NMFA.
Key words: friction welding, low alloy steel, construction cutting, model choke, model fitting pipe, welding parameters, the hardness of the weld, macrostructure, microstructure, weld quality

SPECIAL TYPES OF TECHNOLOGIES

Kolodny A. V., Korovina N. A., Lagutkin M. G. — Design and calculation of the horizontal tanks strength

The information on the design and calculation of the horizontal tanks strength for oil products and chemical reagents storage, including sulfuric acid are adduced in the article.
Calculated dependences are given to determine the rational arrangement of the saddle supports of horizontal tanks, under which conditions of strength and stability at the lowest possible material consumption will be satisfied. The recommendations for the preliminary choice of the flat bottoms parameters with radial stiffeners for further verification in accordance with GOST R 52857.2 are given. The analysis results by using the software product Solid Works Simulation for stresses and deformations of thin-walled flat round bottoms under hydrostatic pressure, confirming the possibility of their use in horizontal tanks are given.
Key words: horizontal tank, calculation for strength, saddle supports of horizontal tanks, material consumption

Krushenko G. G., Reshetnikova S. N., Iseeva О. А. — Nanomodification of a polymer binder when products manufacture products by winding from carbon plastic materials

In order to reduce the mass of parts, units and mechanisms of both the spacecraft proper and the means of its delivery into orbit, i.e. carrier rocket, the so-called mesh constructions, from the carbon fiber plastic, have found application. The most common way of making mesh constructions from carbon fiber plastic is winding them from carbon fibers.
However, for all the positive qualities of carbon-fiber structures, their effective use is possible only under uniaxial loading at the tensile and compressive stresses due to the unidirectional nature of their structure. The problem of increasing the mechanical properties of carbon-plastic materials is successfully solved as a result of so called nanomodification process: the various chemical compounds introduction into the polymer binder.
In such a case in this regard, the nanopowders, including nanodiamonds, turned out to be the most effective.
Key words: space vehicles, weight reduction, mesh constructions, carbon plastics, nanomodification of polymer binder

MACHINE-TOOL AND CUTTING TOOLS PRODUCTION

Pereladov A. B. — Optimization of the abrasive tool structure parameters with a complex grain composition of the grinding material

The paper presents the results of studying the negative influence of a bundle contained in an abrasive tool on the efficiency of processing. The ways of the tool structure optimizing are proposed. The researches of the disperse systems modeling structure abrasive materials consisting of a grains mixture having various grain sizes and higher density structure are described. Developed physical model and obtained on its basis mathematical model of the multifractional disperse systems that are used for tool design (calculation of components weights and volumes for the abrasive mass of moldable blank) with a predetermined hardness and minimum binder portion in the instrument fraction volume are described. The technique of creating an abrasive tool with a complex grain composition, which allows to determine the filling ratio of the volume with dispersed components and other desired parameters is described. The results of laboratory and industrial tests of abrasive tools with reduced binder content are adduced.
Key words: multifraction disperse system, binder, abrasive tool, structure, multifraction composition, physical model

METHODS OF CONTROL AND DIAGNOSTICS IN MECHANICAL ENGINEERING

Dronov Е. А., Barakhov V. I., Samochkin V. N. — The defectiveness investigation of the cast-iron cylinders internal structure for diesel engines through the use of X-ray computational tomography

Presented herein are main types of defects in inner structure of cast iron cylinders produced for diesel engines, the defects being subject to detection by method of computational X-ray tomography. Basing on the analysis of the results obtained we can estimate the character of probable defect structure available in each individual cylinder.
Main tasks are set to eliminate the defects with use of computational X-ray tomography to improve quality and reliability of the diesel engines produced.
Key words: structure defects, computational X-ray tomography, diesel engine cylinder, quality, reliability

Fedorov А. А., Bespalov A. V., Komarov R. S. — Determination of metal deformation resistance through the use of a new design sample

The research results of the deformation resistance, for example, AMg6 and BT1-0 alloys through the use of a sample of a new design for testing are introduced. High degrees of homogeneous deformation corresponding to the accumulated deformations in real forming processes have been achieved. The volume diagrams σs = σs (θ, Λp, ξ) over a wide range of temperatures (θ), degrees (Λp), and strain rates (ξ) are approximated by an expression convenient for use in mathematical models of metal pressure treatment processes.
Key words: resistance to deformation, degree of homogeneous deformation, a cylindrical specimen, metal forming

MATHEMATICAL MODELING, NUMERICAL METHODS, PROGRAM COMPLEXES

Beshchekov V. G., Nosov A. G., Solopov E. V., Markin K. N., Voloshchenko M. S. — The physical model development for the forming technological process of the combustion chambers prototype for aircrafts from oxide ceramics, composite and refractory metals

The paper presents a physical model of the technological process of forming the combustion chambers prototype for aircraft from oxide ceramics, composite and refractory metals. The energy conditions for plasma stream during the transportation and formation of the combustion chamber (CC) prototype for the aircraft engine made from oxide ceramics, composite and refractory metals are determined. A complex criterion of the plasma-turbulent external impact on the substrate of the formed CC prototype is developed.
Key words: physical model, technological process, combustion chamber, oxide ceramics, composite, refractory metal

AUTOMATION AND CONTROL OF TECHNOLOGICAL PROCESSES AND MANUFACTURES, CAD

Alekseev V. A., Kolosov S. P. — Equipping the bot-tractor with electric drives with intellectualization of the on-board control system, in order to improve the functioning efficiency of the agricultural sector

The proposed approach to equipping complex systems with propulsion and electric drives, instead of internal combustion engines and with hybrid facilities, with the use of intellectualization for the development of botnet technology for the agricultural designation and for improving the efficiency of the agro-industrial complex as a whole, is considered in the article.
Key words: electric motor, bot, robotics, tractor, intelligent data analysis (IDA), artificial intelligence (AI), agricultural

ECONOMICS OF MACHINE BUILDING, PRODUCTION ORGANIZATION

Feofanov A. N., Ponomarev K. S., Shutikov М. А. — Electronic document circulation systems as a tool of digital economy

The article notes an increase in interest in the development of digital economy techniques by the highest state bodies of the Russian Federation at the present moment. The advantages of digitalization are described; the algorithm of data transmission in digital systems is given. It is revealed that one of the aspects of the development of machinebuilding enterprises at the present moment is digitalization and automation of technological processes. The advantages of introducing electronic document management systems in the organizations of the machine-building industry are revealed, as well as the main risks that exist when introducing such systems are pointed. The integration variants of electronic document circulation systems with ERP and CAD / CAM / CAE systems are considered. The most popular firms — manufacturers of electronic document circulation systems are defined and application of electronic digital signature in electronic document circulation systems is developed for the purpose of information protection. In conclusion, the need to introduce and develop electronic document circulation systems at Russian enterprises is declared.
Key words: digital economy, digitalization, electronic document circulation

FOREIGN EXPERIENCE

Potapova G. S. — Content of foreign journals

INFORMATION

NPO "Technomash" — 80 years

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