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Vol 37, No 12 (2017)

Article

Classification and Calculation of Drive Loads

Ivanov A.S., Fomin M.V.

Abstract

To permit calculation of the fatigue strength of drive components, drives are classified in terms of their loading conditions. Formulas are presented for the equivalence factors used in converting the actual variable loading conditions to conventional constant conditions. The overload coefficients required in calculating the static strength of drive components at the peak load are also determined.

Russian Engineering Research. 2017;37(12):1017-1022
pages 1017-1022 views

Deliberate Deformation of a Thin-Walled Cylinder on Clamping

Ogorodov V.A.

Abstract

A model and formulas are derived for the clamp parameters that will ensure deliberate deformation of a thin-walled cylinder on clamping.

Russian Engineering Research. 2017;37(12):1023-1027
pages 1023-1027 views

Influence of Planetary-Gear Structure on the Load Distribution

Plekhanov F.I., Molchanov S.M., Suntsov A.S.

Abstract

A method is proposed for determining the load in the gear engagements of a multiflux planetary gear with flexible carrier jaws. The influence of the design and manufacturing errors of the mechanism on the pliability of its components and the nonuniformity of the load distribution over the satellites is determined.

Russian Engineering Research. 2017;37(12):1028-1032
pages 1028-1032 views

Wheel-Walking Propulsion Unit of a Planetary Rover with Active Suspension

Malenkov M.I., Volov V.A.

Abstract

The scheme of the propulsion unit with walking mechanism for a wheeled planetary rover is considered. The walking mechanism permits to convert the chassis in a transport position, displacement of rover’s center of mass so as to optimize the load on motor wheels. In wheeled motion the walking mechanism realize function of the active suspension for adaptation of the locomotion system to the surface features. On friable soils where wheeled locomotion is difficult or impossible, wheel-walking mode improves trafficability.

Russian Engineering Research. 2017;37(12):1033-1040
pages 1033-1040 views

Magnetic-Pulse Shaping of Internal Pipe-Blank Surfaces

Kukhar’ V.D., Kireeva A.E., Sorvina O.V.

Abstract

A finite-element model is proposed for the shaping of internal pipe-blank surfaces by means of the pressure of a magnetic pulse. The roughness of the internal surface after compression onto a mandrel is expressed as a function of the number of loading cycles, the pressure of the pulsed magnetic field, and the initial roughness of the blank.

Russian Engineering Research. 2017;37(12):1041-1043
pages 1041-1043 views

Ultrasonic Assembly of Press-Fit Joints

Nigmetzyanov R.I., Sundukov S.K., Fatyukhin D.S.

Abstract

The behavior of press-fit joints under the action of ultrasound is studied. The influence of ultrasound and the tightness of the joint on the quality of assembly is considered.

Russian Engineering Research. 2017;37(12):1044-1047
pages 1044-1047 views

Influence of Cathode Structure and Configuration on Complex Nitride Coatings

Tabakov V.P., Shirmanov N.A., Sizov S.V., Chikhranov A.V.

Abstract

The production of complex (multielement) nitride coatings on the basis of different cathode structure and configuration is considered. The coatings obtained by means of one-piece and composite cathodes have different properties. This difference is smaller for multielement coatings.

Russian Engineering Research. 2017;37(12):1048-1051
pages 1048-1051 views

Antiwear Properties of Coatings on Artillery Barrels

Vagin A.V., Albagachiev A.Y., Sidorov M.I., Stavrovskii M.E.

Abstract

Copper-based coatings obtained by nonabrasive antifrictional finishing in a metal-coating bath increase the wear resistance of frictional pairs by a factor of 2.2 and prevent the diffusion of hydrogen into the surface layers of the steel.

Russian Engineering Research. 2017;37(12):1052-1058
pages 1052-1058 views

Elastomer Heat-Shielding Materials Containing Aluminosilicate Microspheres

Kablov V.F., Novopoltseva O.M., Kochetkov V.G., Lapina A.G., Pudovkin V.V.

Abstract

The influence of hollow aluminosilicate microspheres on the efficiency of elastomeric thermoprotective materials based on ethylene—propylene rubber is considered. The introduction of hollow aluminosilicate microspheres, even in small quantities, decreases the density and heat conductivity of such materials, with no loss of physical and mechanical properties.

Russian Engineering Research. 2017;37(12):1059-1061
pages 1059-1061 views

Brittle Failure of Low-Carbon Steel Structures at Low Temperatures

Kabaldin Y.G., Anosov M.S., Zhelonkin M.V., Golovin A.A.

Abstract

The brittle failure of metals at low temperature is analyzed. The temperature of ductile—brittle failure depends on the lattice parameter of the metal, while the temperature of brittle failure depends on the type of lattice, the electron structure, and the presence of impurities at the grain boundaries. Means of increasing the brittle strength of the steel at low temperature are proposed.

Russian Engineering Research. 2017;37(12):1062-1069
pages 1062-1069 views

Additive Manufacturing with Ultrasound

Nigmetzyanov R.I., Sundukov S.K., Fatyukhin D.S., Grib V.V., Kartsov S.K.

Abstract

Additive manufacturing methods are briefly reviewed. Proposals are outlined for the use of ultrasound in fused deposition modeling (FDM) and selective laser melting (SLM). Approaches to ultrasonic additive manufacturing (UAM) are discussed.

Russian Engineering Research. 2017;37(12):1070-1073
pages 1070-1073 views

Ultrasound Treatment of Curved Contours and Complex Surfaces

Kazantsev V.F., Kuznetsov S.Y., Sundukov S.K., Fatyukhin D.S., Britvin L.N.

Abstract

The ultrasound treatment of curved contours and complex surfaces is considered. Appropriate design approaches are discussed. As examples, automated ultrasound treatment processes are presented.

Russian Engineering Research. 2017;37(12):1074-1076
pages 1074-1076 views

Dimensionless Analysis of Supercharger Turbines in Internal-Combustion Engines

Ivanov I.E., Alekseev I.V., Bogdanov S.N.

Abstract

Dimensionless characteristics of turbines are discussed. On that basis, a universal method of mathematical approximation is formulated. The approximation of the turbine characteristics in a TKR-10ST turbocompressor is considered, as an example.

Russian Engineering Research. 2017;37(12):1077-1080
pages 1077-1080 views

Large-Amplitude Ultrasound Systems

Kudryashov B.A., Grib V.V., Gaevskii V.V., Dem’yanushko I.V., Kartsov S.K.

Abstract

Large amplitudes are required in many ultrasound systems. Vibrational systems of rod type are used for that purpose. The selection of materials for large-amplitude ultrasound systems is considered. A manufacturing technology for ultrasound vibrational systems is proposed.

Russian Engineering Research. 2017;37(12):1081-1083
pages 1081-1083 views

Tools for Ultrasound Cleaning

Dem’yanushko I.V., Kazantsev V.F., Karagodin V.I., Luzhnov Y.M., Prikhod’ko V.M.

Abstract

Special high-efficiency cleaning methods are required for industrial products, on account of their complex geometry and the wide range of surface contaminants. The design of ultrasonic radiators for that purpose is considered. Geometric aspects of the formation of cavitation regions are discussed.

Russian Engineering Research. 2017;37(12):1084-1086
pages 1084-1086 views

Surface Modification by Combined Thermochemical and Ultrasound Treatment

Britvin L.N., Gaevskii V.V., Germanova V.A., Nigmetzyanov R.I., Prikhod’ko V.M.

Abstract

The combination of thermochemical and ultrasound treatment is considered. A system is proposed for such combined surface-layer treatment of steel and aluminum-alloy manufacturing components.

Russian Engineering Research. 2017;37(12):1087-1089
pages 1087-1089 views