Progressive technologies and systems of mechanical engineering

USING PYTHON TO ANALYZE RESIDUAL STRESS RELAXATION IN CYLINDRICAL PARTS AFTER SURFACE PLASTIC DEFORMATION

В. Ю. Блюменштейн — 2024-11-20

This article discusses the use of Python software to process data from ANSYS and predict residual stress relaxation in cylindrical parts. Methods for data analysis and their application to simplify calculations and modeling are presented.

A GENERALIZED APPROACH TO ASSESSING THE TECHNICAL CONDITION A TYPICAL MULTICOMMUNICATED ELECTROMECHANICAL SYSTEM (EMC)

В. Ф. Борисенко — 2024-11-20

The current level of development of hardware, digital, information, communication and measurement tools allows us to solve many issues of diagnosing the technical condition of EMC diagnostics and developing forecasts of long-term (short-term) functioning on their basis, as well as the timing of repair operations, their level and the required level of repair equipment.

In practice, in the real conditions of an industrial enterprise, the task of technical assessment of the operability of a particular object is set in another plane, based on the equipment, for example, of the plant with diagnostic tools, the presence of highly qualified specialists who are able to assess the condition of the object and give accurate and strict target indications for the nature of further use of equipment and its operating modes, based on the duration of operation of the equipment, its maintainability, as well as the availability of backup equipment and the degree of its availability.

THE EFFECT OF THERMODYNAMIC FATIGUE ON THE PERFORMANCE PROPERTIES OF PROD-UCTS MADE OF IRON-CARBON ALLOYS

В. И. Бутенко — 2024-11-20

Researches have been carried out of the influence of cyclic thermodynamic loading of steel samples on their operational properties, such as wear resistance and fatigue strength. It has been shown that the combined action of force and temperature factors leads to an increase in the wear rate of the surface layer under cyclic loading, and also reduces its resistance to fatigue failure under the combined action of torsional and bending moments.

TENSILE TESTS OF 10G2 STEEL SPECIMENS AFTER LASER HARDENING AND ALLOYING

А. И. Веремейчик — 2024-11-20

A study was carried out of the dependence of the characteristics of strength and ductility of samples made of structural steel 10G2 on laser hardening and alloying modes. On opposite planes of a sample with overall dimensions of 6 × 20 × 200 mm, 5 tracks were applied. Tensile tests have been carried out. It was established that the destruction of the treated samples in all cases was of a viscous nature with a satisfactory level of destructive deformations at stresses above the tensile strength of the original material. The tensile diagrams indicate a negligible effect of laser processing on the elastic modulus of the material. The results obtained can serve as a basis for studying the relationship between laser beam heating modes and the material properties of the strengthened zone.

PECULIARITIES OF SURFACE ALLOYING OF HARDOX 600 STEEL USING A FIBER LASER

В. С. Голубев — 2024-11-20

The features of surface alloying of Hardox 600 steel using b₄c, WC, and Ni powders based on exposure to ytterbium fiber laser radiation are studied. At a radiation power of ~ 2 kW, high-quality doping zones can be observed more stably over the entire range of laser beam scanning speeds under study. With an increase in the depth of the alloying zone when using b₄c, the microhardness decreases, which is associated with a decrease in the concentration of introduced alloying elements. The microhardness of the layer can vary in the range of 7300 - 16000 MPa.

APPLICATION OF QUICK-CHANGE ZERO-BASED PALET SYSTEMS TO INCREASE THE PRODUCTIVITY OF RUSSIA ENTERPRISES

Е. С. Киселёв — 2024-11-20

The article describes the advantages of quick-change zero-based pallet systems and the effectiveness of their use in technological processes. The article presents the system of quick-change pallets as an effective way to reduce the duration of auxiliary operations to install and reinstall parts. It shows the basic design solutions, providing the accuracy and rigidity of the mounting of the system (snap) on the machine.

SELECTION OF BASES FOR MACHINING AND ASSEMBLY OF WHEEL BLOCK-SHAFT PARTS IN THE ASSEMBLY VERSION OF PRODUCTION

А. Н. Михайлов — 2024-11-20

This article considers the issue of choosing technological bases for processing parts included in the assembly unit block shaft of wheels, providing the required relative position of the surfaces for assembly. At the same time, the technological bases of the parts in the process of forming during machining do not always coincide with the structural bases that ensure the correct assembly of the assembly unit - the block shaft of the wheels. The specific issues of choosing bases to ensure the accuracy of the assembly are considered, taking into account the need for simultaneous orientation of several parts relative to the selected structural base of the main part of the node.

MAIN FEATURES OF THE SYNTHESIS OF THE TECHNOLOGICAL PROCESS FOR REPAIR AND RESTORATION OF GTE COMPRESSOR BLADES

А. Н. Михайлов — 2024-11-20

The article presents data on the uneven nature of blade wear. Various methods for surfacing are considered, an algorithm is created that takes into account the amount of wear and helps to choose a repair method. An analysis of the influencing factors on the endurance of the working surfaces of the blades was carried out. The main features of finishing and strengthening treatment are considered.

MECHANICALLY ACTIVATE COMPOSITE MATERIALS ON A POLYMER BASE

Е. В. Овчинников — 2024-11-20

The introduction of mechanically activated nanodispersed particles and dispersed particles into high-molecular-weight matrices leads to the production of composite particles that differ from the structure of the starting materials obtained using traditional technological approaches. The effect of increasing the activity of composite polymer materials containing in their structure mechanically activated nanodispersed particles of a heterogeneous structure, combining an inorganic solid core and a polymer shell, has been established. The structure of nanocomposite materials containing MA particles, surface activity, and physical and mechanical characteristics have been studied.

THE EFFECT OF A SINGLE DEGREE OF DEFORMATION BY HYDROEXTRUSION ON THE ME-CHANICAL PROPERTIES OF THE AMc ALLOY PRETREATED BY EQUAL-CHANNEL ANGULAR PRESSING

Л. Ф. Сенникова — 2024-11-20

The article considers the results of an experimental study of the effect of a single degree of hydroextrusion on the structure and mechanical properties of an AMc alloy preformed by equal-channel angular pressing and having an ultrafine structure. It is established that with an increase in the degree of single deformation of hydroextrusion, the strength properties of the alloy increase before 260,7 MPa while maintaining satisfactory ductility of the material. The thin structure of the alloy has been studied by X-ray analysis

INFLUENCE OF THE QUALITY OF INITIAL M-ROLL POWDERS ON THE STRUCTURE AND PROPERTIES OF MULTILAYER PLASMA COATINGS

F. I. Panteleenko — 2024-11-20

The article describes the influence of the quality of initial m-rabbit powders on the structure and properties of multilayer plasma coatings. The qualitative indicators of the heat resistance of the alloys and the resulting coatings are associated with the formation of a continuous oxide film on their surface during deposition, which prevents the interaction of an aggressive environment and material. Most modern nickel-based alloys used in technology used to form plasma coatings contain 6-12% aluminum, 20-30% chromium, and 0.15-1.0% reactive element (yttrium, tantalum, etc.). For spraying, five types of powders were used. Metallographic studies have established that calcium-thermal powders are conglomerates with a highly developed specific surface. However, the degree of sphericity can vary within very wide limits, and this shortcoming can probably be eliminated to a large extent by mechanical methods. Atomized powders have a spherical shape, but the peculiarity is that on the surface of some particles there is an alloy film that peels off during the preparation of thin sections and has a structure different from the body of the particle. For powders melted under flux, such a film is thicker and occurs on particles more often than for powders melted in vacuum. However, in both cases, X-ray microanalysis established that in the film, in comparison with the body of the particle, the oxygen content is increased by an order of magnitude and the aluminum content is several times higher.