KSHP. OMD №6-2023

A. L. Vorontsov, D. A. Lebedeva (The Bauman Moscow State Technical University, Moscow)

Investigation of backward-and-forward extrusion of tumblers with a co-bottom part.

Part 21. Methodology for calculating technological parameters at initial deformation by constrained backward-and-forward extrusion

The method for calculating the energy-power and deformation parameters of the process of constrained backward-and-forward extrusion of tumblers with a co-bottom part is presented. The extrusion of both non-hardening and hardening materials is considered. In the latter case, the consideration of hardening of the extruded material is described in detail. The above formulas make it possible to determine such important parameters of the stamping process as the total and specific deforming force, the maximum pressure on the die wall, and the increase in yield stress.
Keywords: forging; tumblers with the co-bottom part; backward-and-forward extrusion; stresses; deformations.

A. I. Kanareykin (Russian State University for Geological Prospecting (MGRI), Moscow)

A method for studying the thermal strength of brittle materials using induction heating

Timely maintenance and repair of equipment is an important task of production. The degree of reliability of further operation depends on how such type of work is performed. When performing complex maintenance and repair of technological installations, the strength of the parts is an important component. The existing experimental methods do not allow us to accurately determine the limiting temperature stresses that cause the destruction of fragile bodies. In this work, a method of testing for thermal resistance, similar to the method of radiation heating, is proposed and investigated. However, in this case, external heating of samples of electrically conductive materials is carried out by high frequency currents, which significantly expands the possibilities of obtaining representative experimental results and simplifies the technique of the experiment.
Keywords: heat transfer; temperature field; thermal resistance; electromagnetic wave; Laplace transform method; Bessel functions; cylinder.

N. V. Rassudov, A. S. Skobeleva, I. V. Ilyin (PJSC «UEC-Saturn», Rybinsk)

Influence of polymorphic transformation temperature on changes in the structural inhomogeneity of titanium alloys during deformation on a screw press

The article considers the microstructure of samples made of titanium alloys (TA6V, VT3-1, VT6, VT8) after deformation on a screw press. In this case, the influence of the degree of deformation and the heating temperature on the structural inhomogeneity of the samples is determined.
Keywords: titanium alloys; degree of deformation; microstructure; macrostructure; heating.

N. S. Kravtsov, I. A. Surkov(«Nadezhnost PLUS Ltd.», Moscow)

Investigation of the causes of cracks in the crossbars of powerful hydraulic presses in the areas of compressive loads

An analysis of the causes of fatigue cracks in the base parts of hydraulic presses in the areas of compressive stresses has been carried out. The influence of eccentric loading and casting defects on the fatigue strength of press parts is considered.
Keywords: hydraulic press; basic details; finite element calculation; stress-strain state; low-cycle fatigue; fatigue strength.
 
Yang Qiang (D. F. Ustinov BSTU «Voenmech», Saint Petersburg)

Design and control of modern robotic manipulators in mechanical engineering

The article deals with issues related to the design and control of an industrial robot. The importance of using a robotic arm to improve the efficiency of production operations and its wide possibilities in production is emphasized. The device of the robot-manipulator and its main parts of the design are considered. Models, types of industrial robots, their characteristics, as well as the main operations performed by them in production are studied. The main advantages and disadvantages of using robotic arms in industrial production are revealed. The main types of control of its work are studied: cyclic, positional, contour. An integrated approach to the implementation of the process of controlling robotic manipulators in production will achieve high results, optimize work and increase its overall efficiency. It is noted that the future development is behind the development and implementation of robotic arms in industrial production, which in the long term will allow enterprises to strengthen their positions in the domestic and foreign markets, get high profits and reduce the risks of industrial and economic security.
Keywords: production; industry; industrial robot; mechanical engineering; control.

E. V. Solovieva (Ivanovo State Power University, Ivanovo)

Influence of the composition of the cutting-edge lubricant on the cutting force and thermo-EMF

The analysis of the influence of the composition of the cutting-edge lubricant on the turning of steel is presented. In the course of the study, the features of the influence of polyglycol ethers on the cutting force and thermo-EMF of a natural thermocouple, a cutting tool – a part, are considered.
Keywords: thermo-emf; cutting force; polyglycol ethers.

A. U. Shingisov, R. S. Alibekov, S. U. Yerkebaeva (M. Auezov’ South-Kazakhstan University, Shymkent, Kazakhstan)

Investigation of the applicability of pear fruits as a basis for lubricants in industry

Pear (Pyrus sp.) is a fruit crop grown in temperate regions, which is not only of significant nutritional value, but may also become the key to the creation of new lubricants for industrial applications. Due to the high content of flavonoids, which have antioxidant properties, and the presence of macro- and microelements in the composition of pear fruits, especially varieties of Kazakh breeding: «Sylyk», «Zhazdyk» and «Bostandyk», the possibility of their use in the production of environmentally friendly and effective lubricants is being studied. Macro- and microelements were found in these pear varieties, including magnesium, phosphorus, sulfur, potassium, silicon, calcium, chlorine and others. Their presence and concentrations were determined by inductively coupled plasma mass spectrometry (ICP-MS) and scanning electron microscopy (SEM). Comparative analysis showed that the Bostandyk pear variety has the most complete spectrum of macro- and microelements. The research is aimed at assessing the potential of these fruits as a basis for the creation of new lubricants that can be applied in various industries.
Keywords: pear; mass spectrometry; mineral elements; flavonoids; lubricants; industry.