In the last decade, the oil and gas industry has been in dire need of seamless steel pipes resistant to corrosive destruction, which is associated with the development of oil production containing large amounts of hydrogen sulfide and other aggressive impurities. A key role in achieving high rates of resistance to hydrogen cracking is assigned to the development and use of methods for controlling the type, quantity, size and morphology of non-metallic inclusions, the forms of the presence of impurities, the release of non-metallic excess phases or reinforcing structural components. The authors analyzed the current technology of smelting and casting of 13XFA steel at the PF LLP "KSP Steel" enterprise and developed a set of technological measures for smelting, out-of-furnace processing and casting of 13XFA steel, providing a high level of resistance to hydrogen cracking. The conducted series of melts according to the developed technological indicators ensured the achievement of the main HIC indicators at the level of CLR and CTR = 0%. The research was carried out within the framework of grant funding from the Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan for a competition for grant funding for scientific and (or) scientific and technical projects for 2024-2026 under the project AR23487674 "Integrated processing of bauxite in Kazakhstan with additional iron recovery by alternative reducing agents in the implementation of the low-carbon development strategy".

https://doi.org/10.48081/RXIH6581

2024

Issue 4

Modern air compressors used in the mining industry have a high margin of safety when operating in difficult conditions: This includes uneven terrain, high temperature differences and work underground. Scientific research, complex of theoretical and experimental studies, is carried out in order to obtain sound initial data, to find principles and ways to create a new generation of compressors for use in a mining field. Air compressors are used in deep mines, including supplying clean air, since there may not be enough air in the mine. The compressor can take in outside air, compress and filter it, then feed it into the tunnel. It is necessary to choose compressor equipment for use in mines very carefully; there are many potential risks and limitations. The basic problem, its relevance – in this paper, the issues related to the device, operation and the possibility of optimizing the design of a screw compressor, gas compressor station in the mining industry are considered. The methods used. The modeling of processes and the construction of flowcharts were carried out using programs MathCad, Drawio, MS PP. A simplified mathematical model of a screw compressor is obtained. Key hypotheses and conclusions. Of the work carried out, the optimal regulator capable of controlling the system with minimal energy consumption has been determined. Originality. The relevance of the topic is explained by the fact that in Kazakhstan and other developing countries special attention is paid to the issue of energy conservation. This requires an increase in the efficiency of gas compressor equipment in general and compressor stations in particular. The practical value is an optimal regulator capable of controlling the system with minimal energy consumption.

https://doi.org/10.48081/XITR9105

2024

Issue 4

This article presents the results of thermodynamic modeling of the process of smelting chromium-manganese-silicon-containing ferroalloy from technogenic raw materials of Kazakhstan. Thermodynamic modeling of chromium-manganese-silicon-containing ferroalloy was carried out using the HSC Chemistry 6 software package (Outokumpu, Finland), based on the principles of minimizing the Gibbs energy and thermodynamic variational principles. Thermodynamic analysis for modeling the process of smelting a complex alloy was carried out in the temperature range from 500 to 2000 ℃ for four real charge compositions (with a 5% deficiency of solid carbon, with a normal course of the regime, and with an excess of solid carbon of 5% and 10% of the stoichiometry). The mechanism of combined carbothermic reduction of silicon, manganese, chromium and iron was studied using the Fe-Cr-Mn-Si-Al-Ca-Mg-C-O system. The calculations performed allowed us to fully study all the physicochemical processes occurring during smelting of chromium-manganese-silicon-containing ferroalloy using the carbothermic method. Based on the thermodynamic data, the optimum consumption of solid carbon per 100 kg of charge (chromium and manganese dust) was determined to be 10.75 kg. The chemical composition of the ferroalloy at 1800 °C is, %: Cr - 35.84; Mn - 24.47; Si - 16.25 and Fe - 22.63.

https://doi.org/10.48081/MJRO9482

2024

Issue 4

The relevance of the study is due to the growing requirements to the accuracy and quality of machining parts in mechanical engineering and construction. The article is devoted to the study of the possibility of using the finite element method (FEM) to optimize the design of metal-cutting machines and construction equipment, in particular, crane girders. In the paper the calculations by the finite element method are carried out for different geometries of crane girder beds and beds of metal-cutting machine tools. The deformation, stress and natural vibration frequencies of the structures were analyzed. The results show that the application of FEM allows to evaluate the strength and stiffness of structures, to identify the zones of increased stresses and to optimize the geometry to increase their load-bearing capacity. Special attention was paid to the use of new materials and design solutions. For example, the use of polymer concrete as a material for the manufacture of machine tool beds was considered, as well as the use of stiffening ribs with variable pitch to increase the strength and stiffness of structures. The obtained results confirm the efficiency of FEM application for optimization of machine tool and construction equipment structures. The models developed on the basis of FEM allow to increase accuracy and reliability of equipment operation, reduce material intensity and production costs.

https://doi.org/10.48081/ZNZL7535

2024

Issue 4

This article reflects the study of the unstable deformed state of pipe shut-off valves, in particular wedge valves, which are used to control the flow of various media in pipeline systems. The paper presents the features of the operation of shut-off valves, the principle of operation of the valve, materials for its manufacture, methods of measuring wear resistance and reliability. The advantages and disadvantages of wedge gate valves are also described. The variety of operating conditions, the high need for reliability and durability, as well as the design differences of the valves complicate the selection of optimal equipment for specific operating conditions. The emphasis is placed on the need to take into account real operational parameters – such as flow velocity, temperature of the transported medium and the position of the wedge – in the design and strength calculation process. The main attention is paid to the issues of surfacing, hard wear-resistant materials, as well as resistance to damage to sealing surfaces. The experimental part of the study includes the deposition of Sv-10X17T in a protective gas environment and observation of the mechanical properties of the deposited layer. In the course of the calculations, the results of confirming the effectiveness of surfacing in increasing the resistance of fittings to wear and resistance to cavitation, which is especially important for operating conditions in aggressive environments.

https://doi.org/10.48081/LOWU5474

2024

Issue 4

This paper explores the possibilities and potential of 3D printing in the production of electric motor components, focusing on its transformative impact on prototyping, customization, and manufacturing. The main goal is to investigate the feasibility of producing functional and efficient electric motors using additive manufacturing technologies, particularly for Brushless DC (BLDC) motors. Key aspects include identifying which components can be effectively 3D printed and understanding the benefits and challenges of integrating 3D-printed parts into motor assemblies. The study examines successful examples of 3D-printed electric motors, such as Christoph Laimer's 600W Halbach-array BLDC motor and others designed for drones, robotics, and educational purposes. These examples highlight the ability of 3D printing to create custom geometries, optimize material usage, and rapidly iterate designs. Furthermore, the research details ongoing efforts to print and assemble a Laimar-inspired 600W BLDC motor, emphasizing technical characteristics and the role of 3D printing in improving its efficiency and adaptability. By showcasing the potential applications of 3D-printed motors across fields like robotics, electric vehicles, and aerospace, the study concludes that additive manufacturing represents a groundbreaking shift in electric motor development. It not only accelerates prototyping processes but also reduces costs and opens new avenues for innovation in design and performance optimization. Keywords: Mechanical engineering, additive manufacturing, automotive industry, 3D printing, industry 4.0, drones, unmanned vehicles

https://doi.org/10.48081/ZPSI4565

2024

Issue 4

This article explores the dynamic behavior of self-propelled concrete mixers within the longitudinal plane, focusing specifically on the effects of road micro-profiles, represented as a one-dimensional function ℎ(?). The study examines a stationary road micro-profile that remains consistent across different road sections and applies Fourier series to analytically model periodic micro-profiles with arbitrary shapes and irregularities. Through this approach, the research delivers a detailed analysis of how road surface variations impact vehicle dynamics, with particular attention to the fluctuations experienced by self-propelled concrete mixers. A significant observation is the pronounced non-uniformity in motion, particularly when these mixers operate on rough surfaces covered by hard coatings. The findings emphasize the necessity of precise road irregularity modeling to enhance the understanding of the operational conditions influencing self-propelled concrete mixers. In addition, the study offers valuable insights for optimizing vehicle design, improving suspension systems, and ensuring better performance, durability, and efficiency under uneven and challenging road conditions.

https://doi.org/10.48081/IEMN6812

2024

Issue 4

Computer-aided design (CAD) systems are used in various industries in the design and development processes. This system simplifies the design process, thereby saving time and resources. This article shows the design and modeling processes of gears for a vertical-axis wind turbine. Gear pairs are important components of mechanical systems and perform a key function in the operation of various mechanisms. The design and production of gear pairs that provide torque transmission are the basis of the mechanical engineering industry. Geometric calculation of gear pairs can be carried out using SolidWorks software. Solidworks is a CAD software package for automating the work of an industrial enterprise. It is used at the stages of design and technological preparation of production. Provides design of products of any complexity and purpose. The program presents a method for designing gears, which is capable of designing various types of gears based on the original geometric parameters. Naturally, the design process requires user competence in the gear theorem and manufacturing technology. The developed gear pairs can be used in various fields of technology (robots, working machines, vehicles, etc.).

https://doi.org/10.48081/WVJN3057

2024

Issue 4

This article provides an in-depth study of the impact of extruder geometry on its mechanical properties, specifically stress and deformation. The research was conducted in the ANSYS Workbench (WB) software by modifying geometric parameters, including a detailed analysis of the effect of wall thickness on the extruder's mechanical behavior. The results showed that increasing the wall thickness leads to greater structural stiffness, which, in turn, reduces deformation. However, when a certain wall thickness is reached, a reduction in stress is observed. This phenomenon highlights the importance of determining optimal wall thickness values when designing extruders. Changes in wall thickness improve the extruder's resistance to deformation and dynamic loads, significantly enhancing its operational reliability. Selecting the optimal wall thickness increases extruder efficiency and extends its service life. The findings allow for the improvement of the extruder's mechanical properties, strengthening it and ensuring long-term reliability. The research results contribute not only to increasing the efficiency of extruder use in the industrial sector but also to implementing solutions aimed at extending its lifespan, which improves production quality. The methodology presented in the article accelerates the design process, allowing for the development of efficient and economically advantageous solutions. The results provide engineers and designers with concrete recommendations for optimizing the extruder’s structural parameters, which helps enhance production quality and reduce costs.

https://doi.org/10.48081/VPHW5599

2024

Issue 4

This article is devoted to the improvement of the structural scheme of the experimental juicing equipment for juice production at small-scale production facilities. The theoretical analysis of the process of juice pressing on a screw press is considered. The problem of liquid phase rotation from dispersed material using methods of mathematical modeling is described and solved. The principle scheme and characteristics of the press equipment and the principle of its operation are also given. The forces acting on the press equipment and pressure self-regulation mechanism have been determined: Fpres. - pressure force, N; Fsh. - shear force, N; Felas. - elastic force, N. The forces acting on the scheme and any point of the pressure self-regulation mechanism have been determined in connection with the change of the gap between the gape nozzle and the screw winding due to the operation of the press equipment. The proposed methodology of theoretical calculation of the pressing process allows to determine the optimal parameters and press sea buckthorn juice using the proposed structure of the working body. Dependencies (expressions) of the mathematical model are obtained, allowing to determine the optimal values with preliminary consideration of the necessary parameters when strengthening the pressing process. The proposed method of engineering calculation of the pressing process allows to determine in advance the optimal parameters and to create a press of any capacity depending on the production conditions.

https://doi.org/10.48081/BBMZ5380

2024

Issue 4