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Том 36, № 1 (2016)

Article

Models of the turn resistance for high-speed caterpillar vehicles

Kondakov S., Kharlapanov D., Vansovich E.

Аннотация

Experimental results for the drag torque on a high-speed caterpillar vehicle entering a turn are compared with the drag torques determined by existing methods for steady curvilinear motion. Nikitin’s model proves applicable not only for steady turns but also as the trajectory changes on entering a turn.

Russian Engineering Research. 2016;36(1):1-5
pages 1-5 views

Internally sprung wheels

Manfanovskii S., Enaev A.

Аннотация

An internally sprung wheel is proposed to ensure a smoother ride. Appropriate test equipment is developed, and the test results are presented.

Russian Engineering Research. 2016;36(1):6-9
pages 6-9 views

Operational risk assessment in technological systems

Sokolov S.

Аннотация

The operational risk in technological systems may be assessed on the basis of the theoretical probability distribution of possible faults with consequences of differing severity.

Russian Engineering Research. 2016;36(1):10-15
pages 10-15 views

Position of the skew axis of a threaded joint under the action of a tipping torque

Murkin S., Ivanov A., Ermolaev M., Rudnev S., Kuts M.

Аннотация

The position of the skewing axis of a threaded joint under the action of a tipping torque is determined theoretically and experimentally. The position of this axis determines the load distribution in the screws.

Russian Engineering Research. 2016;36(1):16-19
pages 16-19 views

Confidence limits for the low-cycle fatigue curve

Syzrantsev V., Syzrantseva K., Il’inykh V., Chernaya L.

Аннотация

The distribution of the number of loading cycles to failure is considered. To that end, experimental data on sample deformation in low-cycle loading with specified loads are analyzed by means of nonparametric statistics.

Russian Engineering Research. 2016;36(1):20-24
pages 20-24 views

Generation of a random vector field with a specified coherence matrix in vibrational tests

Betkovskii Y., Yakovlev V.

Аннотация

Methods that are easily implemented on a computer are proposed for generating two correlated random processes of the same duration with specified coherence function and generating random signals with a specified spectral matrix of any size.

Russian Engineering Research. 2016;36(1):25-29
pages 25-29 views

Predicting the elastic properties of randomly reinforced polymer composites with antifrictional additives

Bardushkin V., Yakovlev V., Sychev A., Lapitskii A.

Аннотация

The elastic properties of composites (the Young’s modulus, Poisson’s ratio, Lame constant, and shear elastic modulus) are determined in model calculations, when the variation in concentration of the components is taken into account.

Russian Engineering Research. 2016;36(1):30-34
pages 30-34 views

Operational risks for gas pipelines at low temperatures

Bol’shakov A., Zakharova M.

Аннотация

The fundamental causes of accidents in gas pipelines at low temperatures are investigated. Their frequency is determined, along with the critical crack size in the pipe.

Russian Engineering Research. 2016;36(1):35-38
pages 35-38 views

Extending the life of tight joints by polymer-coating application to the shaft surface

Bashkarev A., Kushchenko A.

Аннотация

Polymer coatings may be used in tight joints to prevent fretting corrosion. The constraint on their use is the polymer adhesion with the metal. A method of calculating the life of such joints is presented.

Russian Engineering Research. 2016;36(1):39-42
pages 39-42 views

Concentration gradients in the surface layer of titanium alloy ground by a silicon-carbide wheel

Nosenko S., Nosenko V., Kremenetskii L.

Аннотация

The concentration gradients of alloying elements and impurities in surface nanolayers of BEZ-1 titanium alloy after grinding by a silicon-carbide wheel are determined. The concentrations are determined by local X-ray spectral microanalysis.

Russian Engineering Research. 2016;36(1):43-45
pages 43-45 views

Plasma–powder application of antifrictional babbitt coatings modified by carbon nanotubes

Aleshin N., Kobernik N., Mikheev R., Vaganov V., Reshetnyak V., Aborkin A.

Аннотация

Modification of Babbitt coatings by carbon nanotubes in plasma–powder application is considered. A model is proposed for the interaction of a graphene-like surface and atoms from the Babbitt alloy. The influence of carbon nanotubes obtained by different means on the performance of antifrictional coatings is studied.

Russian Engineering Research. 2016;36(1):46-52
pages 46-52 views

Influence of cutting-edge errors on reamed-surface quality

Zheleznov G., Andreeva S.

Аннотация

In reaming, errors in the size and shape of the machined surface are shown to be mainly due to cutter wobble and the distribution of the deviations over the reamer teeth, as well as misalignment of the reamer axis.

Russian Engineering Research. 2016;36(1):53-55
pages 53-55 views

Resistance of titanium alloys to cutting

Arshinov S., Gorelov V., Kushner V., Burgonova O.

Аннотация

A thermomechanical model of the resistance of titanium alloys to cutting is proposed. The model takes account of the influence of the strain, strain rate, and temperature on the yield point. The maximum yield point in the chip-formation zone and at the front surface of the cutter is established. Analysis of elementary-chip formation in the turning of titanium alloys permits the determination of the temperature and cutting force.

Russian Engineering Research. 2016;36(1):56-62
pages 56-62 views

Wheel–workpiece interaction in peripheral surface grinding

D’yakonov A., Shipulin L.

Аннотация

A model of the wheel–workpiece interaction in peripheral surface grinding is developed. The goal is to predict the microrelief of the blank after repeated microcutting. Models of the abrasive grain, the grinding wheel, individual scratches, and the three-dimensional microrelief of the blank are presented. Experimental results confirm the validity of the model.

Russian Engineering Research. 2016;36(1):63-66
pages 63-66 views

Abrasive-tool wear and the machinability of high-speed tungsten-free steels

D’yakonov A.

Аннотация

The physics of grinding is considered in order to explain the difference in machinability of tungstenfree and tungsten steels. The strength of the most common steels and alloys is studied over a broad range of strain rate and temperature. Analysis of the results established the variation in strength of high-speed tungsten-free and tungsten steels in typical grinding conditions and permits explanation of the difference in machinability of the steels in physical terms. The relation between the machinability of steel and wear of the abrasive tool is investigated in experiments with individual grains (plane angle ϕ = 90°) of different abrasive materials: electrocorundum (24A), zirconium corundum (38A), and Elbor (Borazon). That permits the derivation of a regression equation reflecting the qualitative characteristics of the process, such as the starting point, the presence of an extremum, and the asymptotic behavior.

Russian Engineering Research. 2016;36(1):67-70
pages 67-70 views

Prediction of the cooling of cutting zones by means of vortex tubes in high-speed machining

Korkodinov Y., Peshcherenko S., Esov V., Ablyaz T., Muratov K.

Аннотация

The possibility of using vortex tubes to inject cooled ionized air into the cutting zone in high-speed machining is considered. Numerical calculation of the vortex effect is employed to predict the cooling of the cutting zone. The results are compared with experimental data.

Russian Engineering Research. 2016;36(1):71-73
pages 71-73 views

Automated manufacture of compressor-blade tailpieces

Poletaev V., Tsvetkov E.

Аннотация

An effective method of machining the geometrically complex surfaces of compressor blades in gas-turbine engines is considered (creep-feed grinding). This method is widely used in the machining of hard materials such as high-temperature nickel alloys and cobalt alloys employed in the manufacture of gas-turbine components.

Russian Engineering Research. 2016;36(1):74-76
pages 74-76 views

Diagnostics of drilling in numerically controlled machine tools

Lishchenko N., Larshin V., Basharov R.

Аннотация

Cutting-tool vibration is considered on the basis of existing physical notions regarding forced, free, and self-exciting vibration in a cutting system that consists of interacting tool and workpiece subsystems. A vibrodiagnostic system is studied experimentally in the drilling of a small-diameter by means of an NI CompactDAQ measuring complex.

Russian Engineering Research. 2016;36(1):77-80
pages 77-80 views