Journal "Tekhnologiya Mashinostroeniya"ISSN 1562-322X
Contents (№12 2018)
to russian

CONSTRUCTIONAL MATERIALS, PHYSICAL METALLURGY

Shchetanov B. V., Efimochkin I. Yu., Paegle S. V., Dvoretskov R. M. — Interphase bonds in composite materials with Nb matrix reinforced with α-Al2O3 single crystal fibers with Mo protective coating

The interaction between the Nb and single crystal fiber of α-Al2O3 was investigated at next phase interfaces: fiber-coating and coating-matrix. It was found that high-temperature (1300 °C) flexural strength of CM, reinforced with fibers with coated Mois 1,8 times higher than that of the matrix.
Key words: Nb based composites, single crystal fibers α-Al2O3, interfacial coating Mo tensile strength, high-temperature three point bent testing

BLANK PRODUCTION

Ashkeev Zh. A., Andreyashchenko V. A., Bukanov Zh. U. — Alternative technological line for ball production

The paper describes the advantage of a new, alternative technological line for the production of steel balls production in comparison with existing methods, such as casting, hot volumetric stamping and cross-screw rolling of rolled metal. The new technological line allows to significantly shorten the technological cycle of ball production through the use of a elimination such labor-intensive technological operations as the production of ingots, blooms, cutting of blanks, heating and other operations that require significant labor and energy costs. A method for calculating the cooling time of a cast billet in a crystallizer for ensuring the rhythmicity of operation of all the main technological links of the proposed new alternative production line for ball production is proposed.
Key words: casting and rolling module, processing line, steel balls

TECHNOLOGIES AND EQUIPMENT OF MECHANICAL, PHYSICOTECHNICAL PROCESSING, PRESSURE TREATMENT

Erenkov O. Yu., Kovalchuk S. A., Otryaskina T. A. — Effect of preliminary ultrasonic treatment of thermoplastics on the quality of the parts turning process

The results of experimental studies of a new method for turning billets from thermoplastic polymers of caprolon and fluoroplastic are presented. The technical essence of the method lies in the fact that preliminary machining is performed by advanced processing of the workpiece by ultrasonic vibrations. The results of the experimental verification of the developed method confirmed the expediency of its implementation, since the use of advanced ultrasonic treatment during turning of thermoplastics leads to a decrease in the roughness level of the treated surface of the part, as evidenced by the values of roughness parameters and the type of chips obtained.
Key words: thermoplastics, turning, ultrasonic vibrations, roughness, chip formation

TECHNOLOGIES AND MACHINES FOR WELDING PRODUCTION AND RELATED PROCESSES

Matyushkin B. A., Chavdarov A. V., Denisov V. I., Tolkachev A. A., Mosolov M. M. — The role of electric arc metallization in the restoration technology of the details for the agroindustrial complex

In this article, we consider issues related to the development of supersonic sputtering technology in the conditions of heated compressed air. The dependence of the influence of the metallization distance on the adhesion-cohesive properties of coatings is established.
Key words: electric arc supersonic metallization (EDSM), innovative technology, adhesion, cohesion, dispersed flow

Lyushinckiy A. V. — The tools production for various purposes by using diffusion welding

The technologies of diffusion welding hard alloys with steels at the tools manufacture for mining operations and for precision processing of materials is considered. The technologies distinguish oneself by the types of used intermediate layers — foils and powder tapes based on nickel superdispersed powder (SDP) obtained by thermal decomposition of nickel formiate. It is shown, that depending on the requirements imposed on welded joints, the considered technologies can be successfully applied for manufacture of precision tools for various purposes.
Key words: diffusion welding, intermediate layers, nickel foil, porous bands, superdisperesed powder, welded joint strength

SPECIAL TYPES OF TECHNOLOGIES

Testoedov N. A., Dvirny V. V., Krushenko G. G., Dvirny G. V. — Ensuring of the increased resource of the electric pump unit for the spacecraft

As a result of the work, the patented design of the electric pump unit (EPU) of the spacecraft was developed. This design is characterized by increased efficiency, reduced mass and an increased 20-year life, confirmed by accelerated ground tests, which increases the life of the spacecraft in orbit. According to the data of the conducted research of patent, scientific and technical information, as well as data of contract works with leading foreign space firms, there are no similar designs of EPU of this level in domestic and world practice.
Key words: electric pump aggregate, spacecraft, service life, efficiency coefficient

MACHINE TOOLS AND CUTTING TOOLS PRODUCTION

Nichkov A. V. — Determination of the optimal design parameters for a modular hobbing cutter for cutting wheels with a different number of teeth

A method of hob design elements optimization for machining same module gears with different number of teeth is considered.
Key words: hob, gear hobbing, gear, wear

INSTRUMENT — MAKING TECHNOLOGY

Yangirov I. F., Ismagilov F. R., Maksudov D. V. — Spiral energy storage (SES)

There are original design of low-power spiral energy storage. Composed generalized mathematical model of the SNE with the analytical solution considered special cases of the obtained solution. Original SNE will find wide application in low energy, and developed a generalized theory in the design and construction of Electromechanical vibration transducers with complex geometry secondary electrically conductive element.
Key words: helical spring, inductance, small power

METHODS OF CONTROL AND DIAGNOSTICS

Baraev A. V., Dolzhanskiy Yu. M., Ilingina A. V., Morozov V. S., Kazakov Yu. I., Gaynetzyanov R. A., Zevakin V. T. — Combined technologies of production control and testing of RKT products capacities

Advanced equipment for combined technologies to provide industrial cleanness and strength and leak tests of tanks for aerospace products in machinery and engine manufacturing of the aerospace industry is introduced.
Key words: aerospace hardware, industrial cleanness, cleaning-up, de-oiling, manufacturing tests, strength hydrostatic tests, leakage monitoring

Bigus G. A., Vybornov A. P., Rykova I. S. — Evaluation of the value of the stress intensity factor in the blood vessels, working under pressure, when the detected pores in welds

In the article the questions connected with definition of the maximum admissible values of the stress rate coefficient KI in welding joints of vessels and the apparatuses working under pressure are considered. For establishing such values an engineering approach is proposed, which consists in replacing the existing pore or chain of pores with an equivalent crack. The length of such a crack, together with the radii of plasticity rp is the same as the pore diameter with the pore plasticity zones. The dependence of the maximum permissible values of stress rate coefficient in welding joints of the third category vessels made from steel 09G2S from the wall thickness of the apparatus is obtained.
Key words: diagnostics, efficiency, welding defect, stress rate coefficient, plasticity zone, equivalent crack

MATHEMATICAL MODELING, NUMERICAL METHODS, PROGRAM COMPLEXES

Andreeva L. P., Kopaev B. V., Klimenko I. L. — Mathematical model of short-term static strength of a lapping from a lowcarbon steel brazed with tin

A mathematical model of a brazed joint strength consisting of position and scattering characteristics is introduced. Random and residual errors are taken into account for scattering characteristic.
It is shown that the nature of errors distribution relative to the position characteristic must be considered using untruncated and truncated distribution functions. The lower confidence limit of the destructive stresses of the joint made of steel St3 and brazed with tin is determined, with a confidence coefficient of 0,95 and the upper limit of the stress allowance for a brazed joint with a safety factor of 1,5.
Key words: position and scattering characteristics of the mathematical model, statistical and theoretical distribution functions, truncated and untruncated distribution functions, convolution, confidence limit, random errors, residual systematic errors

ECONOMY AND ORGANIZATION OF PRODUCTION

Limonov S. V., Suslov D. A. — Participation of a specialist in asking questions for expert research

The article discusses the possibility and reasonable need for the participation of a specialist at the stage of setting questions for expert research, taking into account the industry specifics of mechanical engineering. The typical errors of the questions posed to the experts are considered.
Key words: mechanical engineering, reviewing, examination, research, reviewing the expert opinion, error

FOREIGN EXPERIENCE

Potapova G. S. — Content of foreign journals

INFORMATION

Alphabetical Index of Articles for 2018


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