Open Access Open Access  Restricted Access Access granted  Restricted Access Subscription Access

Vol 37, No 5 (2017)

Article

Shakedown of pressure vessel components under cyclic loading

Sabitov M.K., Ponikarov S.I.

Abstract

The limiting load is determined on the basis of the shakedown of structures in cyclic loading, by means of Melan’s theorem and the finite-element method in a shell formulation. For the example of a cylindrical vessel with a branch pipe under cyclic internal pressure, the formulation of the finite-element model and the solution algorithm is considered.

Russian Engineering Research. 2017;37(5):375-377
pages 375-377 views

Energy-efficient oil extraction by sucker rod borehole pumps in low-yield fields

Brunman V.E., Vataev A.S., Volkov A.N., Volkov E.A., Petkova A.P., Kochanzhi F.I., Plotnikov D.G.

Abstract

The efficiency of balanced drives, chain drives, and linear rack and pinion drives is compared for sucker rod pumps. An approach to energy-efficient oil extraction using the kinetic energy of the descending drilling stem is developed, and the corresponding mathematical model is derived. The results of numerical modeling are outlined.

Russian Engineering Research. 2017;37(5):378-382
pages 378-382 views

Deformation of satellite bearings and engagement in cylindrical involute planetary gears

Razhikov V.N., Belyaev A.N.

Abstract

The geometric quality of engagement in K–H–V cylindrical involute planetary gears with little difference in the numbers of gear teeth is assessed. Deformation of the satellite bearings is taken into account here.

Russian Engineering Research. 2017;37(5):383-385
pages 383-385 views

Uncooled choked-flow turbine for limited-power turbine engines

Bogdanov V.I.

Abstract

The gas dynamics of a choked-flow turbine is considered. An uncooled choked-flow turbine may be used in a limited-power gas-turbine engine without marked impairment of its mass and size and with considerable decrease in cost.

Russian Engineering Research. 2017;37(5):386-387
pages 386-387 views

Predicting the fatigue strength of structural elements

Lisin A.N., Nabokov I.I., Mozalev V.V.

Abstract

The development of models relating the fatigue strength of materials to their static strength and plasticity is considered. Statistical strength theories were developed to describe the results of fatigue tests and to predict the strength of machine components with variable loads. Experiments show that the strength of materials depends significantly on structural defects, and the limiting stress is a statistical quantity.

Russian Engineering Research. 2017;37(5):388-392
pages 388-392 views

Control of the selective hydrogenation of acetylene compounds

Kurnasov E.V., Malyshkin A.B.

Abstract

The dependence of the hydrogen supplied to the hydrogenation reactor on the acetylene concentration is simulated. An algorithm is proposed for automatic cascade control of selective hydrogenation. That permits optimization of the hydrogen supply on the basis of the actual acetylene concentration in the ethane—ethylene fraction and the input of raw materials to the reactor.

Russian Engineering Research. 2017;37(5):393-396
pages 393-396 views

Reducing the infiltration at vacuum chambers to obtain ultrahigh vacuum

Tushavina O.V., Afanas’ev V.A., Severtsev S.A.

Abstract

The design of electric heaters in ultrahigh-vacuum chambers is considered. Effective heat shielding of the tested product is proposed. The permissible operating time of the heating elements is determined.

Russian Engineering Research. 2017;37(5):397-400
pages 397-400 views

Modeling of superplastic structural materials

Ganieva V.R., Tulupova O.P., Enikeev F.U., Kruglov A.A.

Abstract

The boundary problem in the mechanics of superplasticity is formulated on the basis of a standard superplasticity power law and the Perzyna viscoplasticity model. Methods of identifying these models on the basis of the same input data are proposed.

Russian Engineering Research. 2017;37(5):401-407
pages 401-407 views

Model of tool life based on fuzzy sets

Pegashkin V.F., Pegashkina E.V., Pishchevskaya E.S.

Abstract

The influence of the statistical distribution of technological factors on the life of a cutting tool is investigated. A mathematical model is developed for determining the mathematical expectation and distribution of the tool life as a function of the distribution of the technological factors.

Russian Engineering Research. 2017;37(5):408-410
pages 408-410 views

Extending the life of stepped punches in the cold extrusion of bushes

Dmitriev A.M., Grechnikov F.V., Korobova N.V.

Abstract

The stress in the critical section of a punch extruding the stepped cavity of a cylindrical part is analyzed. In extrusion with actively directed contact-friction forces, the punch life is increased by a factor of about 1.5.

Russian Engineering Research. 2017;37(5):411-419
pages 411-419 views

Strengthening of low-alloy steel by extrusion, helical pressing, and equal-channel angular pressing

Ivanov A.M.

Abstract

Metals may be strengthened by a combination of extrusion, helical pressing, and equal-channel angular pressing. The mechanical properties of 09G2S low-alloy steel with and without such strengthening are presented. The steel is subjected to failure tests under uniaxial tension.

Russian Engineering Research. 2017;37(5):420-423
pages 420-423 views

Air quality within vehicles

Saikin A.M., Ter-Mkrtich’yan G.G., Karpukhin K.E., Pereladov A.S., Zhuravlev A.V., Yakunova E.A.

Abstract

The high concentrations of harmful materials within vehicles is studied. An air-purification system is developed. Bench tests are conducted. Technical specifications must be developed for filters and air purifiers so as to improve the air quality within vehicles, including electric vehicles.

Russian Engineering Research. 2017;37(5):424-427
pages 424-427 views

Automated standardization of primary and auxiliary materials in order-based production

Kul’ga K.S., Men’shikov P.V.

Abstract

Automated standardization of materials consumption in order-based production is considered. The proposed approach is based on automated information systems for optimal layout of expensive bar and sheet materials, so as to improve the precision in calculating how much material is required and also to reduce material costs in high-tech production.

Russian Engineering Research. 2017;37(5):428-433
pages 428-433 views

Improving the precision of multicoordinate machine tools and industrial robots

Krakhmalev O.N., Petreshin D.I., Fedonin O.N.

Abstract

Mathematical description of the geometric deviation of components in multicomponent mechanisms permits correction of the influence of such deviations on the precision of multicoordinate machine tools and industrial robots.

Russian Engineering Research. 2017;37(5):434-437
pages 434-437 views

Dynamic processes in high-speed machining

Fetsak S.I., Idrisova Y.V., Kudoyarov R.G., Latypov R.R., Omel’chak A.G.

Abstract

The high-speed turning of VT9 titanium-alloy parts is studied experimentally. The influence of dynamic processes in the cutting of VT9 alloy by a VK6OM hard-alloy tool on tool wear is analyzed.

Russian Engineering Research. 2017;37(5):438-439
pages 438-439 views

Monitoring and control of tools in multifunctional machine tools

Tugengol’d A.K., Dimitrov V.P., Izyumov A.I., Yusupov A.R.

Abstract

Machining centers and multifunctional machine tools are used in computerized integrated production. They are equipped with a large number of cutting tools for production of a specific batch of parts. In such automatic systems, monitoring and control systems replace the human operator. Monitoring of the state of machining systems is essential today in monitoring and control of the machining operations [1, 2]. It is important to create monitoring systems to support reliable tool operation in multifunctional machine tools. The goals of such systems are to minimize the damage from serious disruption of tool operation and to ensure timely tool replacement. To that end the multifunctional machine tools and/or the numerical control system must be equipped with sensors and various monitoring devices. A strategy must be developed for the prevention of disruption of the machining process and tool failure.

Russian Engineering Research. 2017;37(5):440-446
pages 440-446 views

Improving the efficiency of hobbing mills

Artamonov E.V., Kireev V.V., Zyryanov V.A.

Abstract

In a well-chosen hobbing configuration, the hazardous tensile stresses in hard-alloy inserts are significantly less than in the standard configuration.

Russian Engineering Research. 2017;37(5):447-449
pages 447-449 views

Mechanics of chip formation in cutting

Artamonov E.V., Vasil’ev D.V., Kireev V.V., Uteshev M.K.

Abstract

The stress–strain state in chip is investigated by the finite-element method. In addition, the cutting process and the mechanics of chip formation are studied experimentally over the whole temperature range of metal cutting.

Russian Engineering Research. 2017;37(5):450-454
pages 450-454 views

Improvements in surface precision by automated design of machining trajectories

Pol’skii E.A.

Abstract

Automated design of the machining trajectories in multifunctional machine tools (compact production systems) may be used to ensure the required surface precision of machine parts. The approach proposed is based on automated generative synthesis of individual processes.

Russian Engineering Research. 2017;37(5):455-458
pages 455-458 views

Variative designing of grinding operations

Ardashev D.V., Guzeev V.I.

Abstract

A new method is proposed for the design of grinding operations—that is, the selection of tool characteristics and machining conditions. In this approach, tool performance is predicted, and combinations of wheel characteristics and grinding conditions are selected on that basis, with simultaneous satisfaction of all the constraints on the grinding operations and the specifications in the drawing of the part. By variant design of the grinding operations, the tool best suited to specific grinding conditions may be identified during preproduction.

Russian Engineering Research. 2017;37(5):459-461
pages 459-461 views

Properties of powder produced by a high-speed method

Titov Y.V., Logacheva A.I., Belan D.Y., Kuznetsov A.A.

Abstract

A high-speed method of powder production is analyzed. X-ray, chemical, and granulometric analysis indicates that the particle size of the powder obtained depends on the grinding conditions. The properties of the powder are basically the same as those of the initial sample.

Russian Engineering Research. 2017;37(5):462-463
pages 462-463 views

Damping properties of an elastic element

Aleksandrov I.K.

Abstract

A new method is proposed for ongoing measurement of the dissipative properties of an elastic element in a mechanical system. The theoretical basis of the method is outlined.

Russian Engineering Research. 2017;37(5):464-466
pages 464-466 views