The study describes the solution to the problem of ensuring the strength of the overhead crane girder made of ASTM A572–50 steel. Optimization of the internal section of the crane beam by placing stiffeners in the form of intersecting ribs (X) increases its bearing capacity. Important factors ensuring the consistency of the characteristics of the ASTM A572–50 steel crane girder are changing the geometry of the crane girder, which is one of the effective ways to increase its strength and bearing capacity. A properly selected beam profile shape optimizes stress distribution and reduces the likelihood of cracks and deformations. The shape of the cross-section of the beam significantly affects the stress distribution inside it. The optimal geometry allows you to reduce the stress concentration in hazardous areas and prevent the appearance of cracks. The analysis shows that a properly selected geometry makes it possible to reduce the weight of the beam without compromising its strength, which reduces the crane's energy consumption and increases its maneuverability. Mathematical modeling allowed us to establish a direct relationship between the load on the crane beam and its deflection. The obtained regression equation with a high coefficient of determination (R2=0.999) confirms the reliability of the model and makes it possible to predict the behavior of the structure under various loads.

https://doi.org/10.48081/YESC1031

2025

Issue 1

This article discusses the problems of analysis, construction and calculation of a mathematical model of oscillations of a single-axis device of a pneumatic suspended crew at the second stage. Pneumatic suspension is widely used in vehicles to ensure comfort and convenient handling. The single-axle device of the pneumatic suspension crew of the second stage is a complex system in which it is necessary to analyze its vibrations to optimize its performance. Analysis of a mathematical model involves determining the following characteristics: - Specific frequencies and forms of oscillations: specific frequencies determine the frequencies that the system oscillates after a disturbance. Specific forms of oscillations characterize the relative amplitude of oscillations in different parts of the system. - Transmission function: the transmission function describes the ratio of the output signal (body displacement) to the input signal. This shows how the system responds to different frequencies. - Comfort level: the level of comfort is assessed by the oscillation amplitude of the bodywork and its derivatives. The analysis of the mathematical model makes it possible to optimize the oscillation characteristics of a single-axle device of a pneumatic suspended crew of the second stage by adjusting the damping and stiffness coefficients. Optimization can focus on: - Decrease in the amplitude of body vibrations; - Increase the level of comfort; - Improve vehicle handling.

https://doi.org/10.48081/HAWP6336

2025

Issue 1

Geopolitical turbulence in the world continues to impact freight logistics and provides growth opportunities for alternative transport corridors and infrastructure facilities. The process of changing the global logistics map has accelerated since the pandemic and subsequent Russian-Ukrainian and Israeli-Palestinian conflicts. All these events, along with the crisis in the Red Sea, have led to the emergence of international logistics contradictions aimed at manipulating the trade potential of the region. Euro-Asian inland transport corridors form one of the largest channels of global goods movement logistics. The Trans-Caspian International Transport Route (Middle Corridor) is considered to be one of these competitive channels. For Euro-Asian countries, the Trans-Caspian International Transport Route plays a more significant role than just a bridge between China and Europe. This transport route primarily allows us to diversify the logistics of goods distribution and update the transport infrastructure of the countries of Central Asia and the South Caucasus. In the context of the destabilization of the geopolitical situation in the world, Kazakhstan, which has large reserves of energy resources and a developed transport and logistics infrastructure, has become a key country in trade relations between Europe and China. The analysis and ranking of Euro-Asian inland transport corridors supporting cargo transportation in the direction China-Europe-China is carried out. Geopolitical, economic and transportation factors determining the role of competitiveness of the Trans-Caspian international transportation route in global logistics are considered

https://doi.org/10.48081/XUYF2842

2025

Issue 1

The article analyzes the effect of the cutting angle on the volume of the blade drawing prism with a multi-level geometry change. The volume of the transported drawing prism is perhaps the most important indicator of the productivity and efficiency of bulldozers with various dumps, so the relevance of the topic of the article does not raise any questions. The influence of geometric and mounting parameters of the working body of a bulldozer on this process is still poorly understood, therefore, the methods and approaches presented in the article to determine the volume of the drawing prism should be of interest to specialized specialists. The article also presents a mathematical analysis of the choice of cutting angle depending on soil conditions and an analysis of the effect of the angle of inclination of the resulting digging resistance force on the change in the coordinate of the center of pressure of the bulldozer on the ground. The dependence of the volume of the drawing prism on the cutting angle when digging various soils has been determined. The analysis of the influence of the angle of installation of the blade visor with a multi-level change in geometry on the process of digging the soil has been performed. Analytical dependencies have been derived to determine the components of digging resistance, taking into account the influence of the cutting angle, which allow optimizing the angle of inclination of the resulting digging resistance depending on the geometric dimensions of the working equipment, soil properties and the coordinates of the center of movement of the bulldozer on the ground. Original conclusions are given. The research related to the publication is funded by the Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan - grant AP22684640 – "Development of an articulated design of a bulldozer blade with a multi-level geometry change".

https://doi.org/10.48081/DUKE7639

2025

Issue 1

To date, increasing the fineness of grinding of various materials is one of the urgent tasks. Among the technological equipment for grinding materials, classical ball mills are the most common. However, according to the results of research in this area, it has been found that there are a number of design factors that prevent an increase in the efficiency of grinding in ball grinders. To solve this problem, this article proposes a new design of a ball mill based on improved versions of the classic constructive version of ball grinders. The novelty of the design lies in the development of an innovative shape of the V-shaped grinding chamber. To evaluate the effectiveness of the proposed mill design, experimental studies were conducted under different operating modes of the mill using the developed laboratory installation. To predict the results of grinding, the authors derived the equation of a regression model based on experimental data. The research results showed that the new design of the ball mill allows you to obtain a grinding product with a larger specific surface area (4946 cm2/g) compared with known prototypes (about 3600 cm2/g). Thus, the new design of the ball mill can be used for applications in production areas that require materials with a high specific surface area.

https://doi.org/10.48081/GJIA8287

2025

Issue 1

The aim of the study is to experimentally evaluate the wear resistance of the deposited layers obtained using Sv08G2C, 30HGSA and OK Tubrodur 35GM wires, which are used in the restoration of electric motor shafts. This parameter directly affects the durability and reliability of the restored part, as well as the efficiency of the entire electric motor. The choice of the optimal material ensures the durability of the shaft during further operation. A direct correlation has been established between the hardness of the deposited material and its wear resistance: the hardest alloy OK Tubrodur 35GM demonstrated the best results, since it had the smallest wear hole area. The largest area of the hole was observed in the surfacing material Sv08G2S. When analyzing the microstructure of the deposited samples with SV08G2C, 30HGSA, OK Tubrodur 35GM wires, the porosity features of the deposited layers for each of the materials were revealed. The highest porosity of the surfacing is observed with 30HGSA wire, the lowest porosity is with SV08G2C wire, the largest number of inclusions is observed with OK Tubrodur 35GM wire. As a result of experimental studies, it was found that to increase the wear resistance and durability of the shafts of electric motors restored by surfacing, it is recommended to use SV08G2C and OK Tubrodur 35GM wires. The results of the study can be used to optimize the processes of repairing machine parts by surfacing.

https://doi.org/10.48081/QKXI3631

2025

Issue 1

The article discusses the application of additive technologies in the production of tooling made from polymer composite materials, and presents the features of the Fused Granular Fabrication (FGF) technological process. It introduces the process of creating a matrix for bending a 90° V-shaped groove from a composite material based on a polymer matrix with the addition of fiberglass to improve wear resistance. During the technological process using the composite matrix, it was found that the springback of the workpieces is practically minimal. The article presents the results of comparing material processing parameters on steel and composite polymer matrices. Based on the experimental results, it is evident that for processing material with a relatively large inner radius, it is preferable to use a polymer matrix, as it allows reducing the pressure force by 10-20% while maintaining the same product quality. Experimental results show that the use of composite polymer matrices for bending in small-scale production reduces the pressure force and lowers production costs compared to traditional metal tools. In conclusion, the advantages and limitations of using such matrices are highlighted, along with recommendations for optimizing the bending process and further industrial use. Keywords: additive technologies, FGF technology, polymer materials, composite materials, bending, V-shaped groove, matrix.

https://doi.org/10.48081/ARVA9340

2025

Issue 1

This article suggests the possibility of using modern automotive high-speed diesel engines assembled with mechanical gearboxes with a significant residual engine life as a drive for auxiliary mechanisms of transport equipment such as power plants, compressors, refrigerators and pumps. With the tightening of environmental emission standards in Europe, Korea and Japan, the market for recycled cars and their parts is actively developing. Diesel automotive powertrains with attachments, control electronics, power supply systems, ignition and other components are the least popular due to emission restrictions. Hence, the use of used diesel power units of recycled vehicles in actuators in our region is of great relevance and makes it possible to significantly reduce the cost of their production. In this regard, the object of the study was the Mitsubishi 4D68T automobile diesel engine and the Vaz-2107 gearbox, which serves, in our case, as a regulating step-down single-stage gearbox. For the first time, based on the available theoretical calculation of the speed characteristics of an internal combustion engine [1] and factory input data, a method for selecting a power unit together with a manual transmission as an actuator is proposed. The optimal operating mode of a diesel engine is calculated, taking into account the selected transmission of a manual transmission at different loads, using the example of a marine diesel generator.

https://doi.org/10.48081/TEKL8315

2025

Issue 1

Currently, scientific and technological progress is associated with the increasing importance of manufacturing technology in the creation of new products. The constant increase in the range of manufactured products, shortening the time for changing production facilities, increasing the complexity of part designs, and increasing the requirements for accuracy and surface quality implies an increase in the volume of blade processing operations, among which hole processing operations occupy a particularly prominent place. This article is devoted to optimizing machining operations to ensure that the finished part is of the required quality at a minimum cost of processing. The effectiveness and expediency of the widespread use of scientifically based optimization methods for the analysis and processing of information, in particular, for the research and optimization of various technological processes of metalworking, is shown. An increase in the efficiency of the hole processing process with a chisel assembly with a rigid attachment without vertex teeth was achieved using a mathematical model solved graphically. Technical limitations have been selected and calculated, and a graphical representation of the machining process with a chisel assembly with without vertex teeth for structural steel (Steel 45) has been constructed. Optimal modes (rotation speed and feed rate) of hole processing have been determined, taking into account all technological, structural, organizational and production conditions.

https://doi.org/10.48081/DBOI7744

2025

Issue 1

Currently, HARDOX steel is widely used by machine-building enterprises of the Republic of Kazakhstan (RK). The results of research conducted in the conditions of machine-building enterprises showed that there is a problem in the mechanical processing of HARDOX steel associated with high consumption of cutting tools. As at processing of steel HARDOX the cutting tool is subjected to premature wear. This state of the problem dictates the need to develop a resource-saving method of machining HARDOX steel. The purpose of scientific research is to determine the influence of cutting modes on the hardness of the machined surface of HARDOX steel during thermofriction milling with pulse cooling. To investigate the hardness of the machined surface after thermofriction milling with pulse cooling, experimental research methods were used, experiment planning with the use of the computer program “Statistica 10”. The results of the experimental study showed that by selecting cutting modes it is possible to control the hardness of the machined surface. It is known that HARDOX 450 steel has a guaranteed hardness of 425-475 HB. The range of hardness variation does not exceed 50 HB according to SSAB technical requirements. As a result of experimental study it was found that the initial hardness of HARDOX 450 steel does not decrease and if necessary by selecting cutting modes it is possible to ensure its increase. It was found that with increasing depth of cut (t) and feed rate (S), the hardness (HB) of the machined surface increases.

https://doi.org/10.48081/BNPE4061

2025

Issue 1