The article presents the results of research on optimizing the technological parameters of the grinding process of materials by spring-rotor mills using second-order mathematical modeling. Based on the planning of an experiment with five variable factors, second-order polynomial models were obtained for five key output parameters: fineness of grinding, productivity, drive power, specific energy consumption, and specific metal consumption. Regression equations describing the relationship between the technological parameters and the output characteristics of the process are obtained by the method of a complete factor experiment. A statistical analysis of the adequacy of the models was carried out and the most significant factors influencing each of the output parameters were determined. Based on the analytical solution of systems of equations, optimal values of technological parameters are found that ensure maximum productivity with minimal energy consumption and the required product quality. Practical recommendations on equipment configuration have been developed and acceptable ranges of parameter variation have been determined to ensure the stability of the technological process. The results of the study show the possibility of increasing productivity by 15-20% while reducing energy consumption by 8-12% compared to empirically established operating modes. The obtained models and optimization techniques can be used to improve technological processes at bulk material processing plants.

10.48081/BGQF1914

2026

Issue 1

Проведены исследования термоинструмента для напыления порошков естественных минеральных сред в зависимости от их свойств. Использовалась горелка ракетного типа. Разработана пористая система охлаждения на основе сетчатых структур и пористых покрытий. Для проведения напыления покрытий применялись сверхзвуковые многофазные высокотемпературные пульсирующие факелы. В исследованиях применялся метод интегральных измерений и голографии. Система охлаждения работает при совместном действие капиллярных и массовых сил. Применялось давление кислорода 1.2÷1.5 МПа, критический диаметр сопла (4÷5)×10-3 м, диаметр камеры сгорания 14×10-3 м. Исследовалось нанесения напылением на вертикальную поверхность на определенной площади пятна растекания и оптимальном расстоянии факела до среза сопла. Установлена структура затопленной струи и ее спиновая детонация в виде участка бочек, вздутии струи на конечном участке и показан разрыв факела на центральном участке. Определена критическая толщина разрушения покрытия и построена эпюра распределения на поверхности покрытия напряжений. Напряжения сжатия являются наибольшими в нагреваемом слое, а по мере удаления от него эти напряжения резко убывают и переходят в напряжения растяжения, достигают некоторого максимума и затем убывают.

10.48081/BGQF1909

2026

Issue 1

This article systematically analyzes the factors that determine the sustainability of intermodal transportation of agricultural products in Kazakhstan. The study proposes a three-dimensional conceptual framework (economic, operational, and external – geopolitical/ecological), while the evaluation indicators are defined as timeliness, damage rate, total cost (USD/t), share of empty return, delay frequency, carbon footprint (CO₂, kg/t), and integrated risk level (1–5). Geographic specifics (lack of direct sea access, long routes, climate), route complexity, modal combinations, digital solutions (Astana-1, CIM/SMGS, KTZ Express, IoT/AI/WMS), regulatory and legal environment (TIR, COTIF/OTIF, EAEU), and operational “bottlenecks” (shortage of wagons/containers, port/ferry capacity, border procedures, workforce/automation, container turnover) are considered comprehensively. Case studies (KTZ Express – Xi’an Dry Port; DHL Rail Connected; Astana Agro – India; “Transco” – Afghanistan; KTZ Express – Turkey, LCL) are comparatively analyzed; based on the international benchmark (Germany, China, Finland, Poland, Singapore), a roadmap and a KPI dashboard for policy and management have been proposed. The analysis demonstrates that intermodal sustainability depends not only on infrastructure but also on legal-institutional and digital interoperability. The developed indicators and KPI dashboard are tailored for practical monitoring. The 2025–2027 roadmap provides conditions for measurable enhancement of the sustainability profile.

10.48081/BGQF1927

2026

Issue 1

Abstract The article presents the results of comprehensive experimental and analytical studies aimed at improving the performance and durability of steel components through the application of double-layer gas-thermal coatings. The lower layer acts as a damping barrier and consists of a copper–aluminum alloy in a 4:1 ratio, which provides high adhesion of the coating to the substrate, reduces residual stresses, and improves thermal compatibility between the materials. The upper layer is made of titanium carbide, forming a dense, strong, wear-resistant, and heat-resistant surface. The use of the gas-thermal spraying method made it possible to obtain coatings with uniform particle distribution, high structural density, and minimal porosity. Detailed studies of the microstructure and phase composition revealed the formation of a fine-grained structure with inclusions of titanium carbides, nitrides, and oxides that comprehensively strengthen the surface and increase its resistance to external influences. The analysis of mechanical properties showed a significant increase in hardness, adhesion strength, and corrosion resistance compared to uncoated samples. The obtained results confirm the effectiveness of the developed technology and its practical importance for restoring, protecting, and extending the service life of machine parts operating under conditions of high loads, friction, elevated temperatures, and aggressive environments.

10.48081/BGQF1910

2026

Issue 1

The article provides an analysis and forecast of the development of additive technologies and 3D printing by region, agroindustry and fields of activity, a systematic classification of additive methods by method of application and types of materials. An overview of the development of additive technologies in the world is given, as well as various methods of additive technologies for comparison. In addition, the parameters of additive processes, material properties and current issues are discussed, as well as an overview of research on the development of additive technology applications. The author's version of the identification of the stages of development of additive technologies according to generalized criteria is proposed. The relevance of using AM (Additive manufacturing) technologies for the restoration of agricultural machinery parts is substantiated, tasks are formulated to optimize the use of 3D printing of AM (Additive manufacturing) technologies in repair production and to create in modern conditions a rational system for the organization of maintenance and repair of agricultural machinery parts and the application of additive technologies to production. The study was carried out within the framework of the grant topic funded by the Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan AP23489364 «Use of additive technologies in the repair of agricultural machinery with process optimization through modeling and experimental research».

10.48081/BGQF1913

2026

Issue 1

One of the promising types for industrial application is high-class planar linkage mechanisms (HCM). The wide use of these mechanisms is hindered by the difficulty of kinematic analysis, particularly solving the position problem: given the position of the driving link, determine the coordinates and/or angular positions of the driven links for all existing assemblies. In the general case, for class II and HCM mechanisms, the system of kinematic equations is a system of trigonometric or algebraic equations. If for class II equations the system of kinematics equations can be solved analytically, then for HCM the system of kinematics equations cannot be solved analytically. This is due to the fact that class II mechanisms can be divided into a sequence of dyads, each of which is two equations with two unknowns that can be solved analytically, and it is impossible to divide the HCM into a sequence of dyads, and therefore various numerical methods have to be used to solve the problem of the positions of the HCM, the implementation of which is quite complex. a computational task. Therefore, automating the solution of HCM kinematics problems is an urgent task, the solution of which will make it possible to widely use HCM for various industrial applications. This article discusses the conceptual representation of high-class planar lever mechanisms as a system of material points with connections superimposed on it, which allows us to move on to algorithms for automatically deriving kinematics equations and determining the degree of mobility of the studied mechanisms.

10.48081/BGQF1906

2026

Issue 1

In the metalworking industry, the microbiological contamination of metalworking fluids (MWFs) and the subsequent formation of stable biofilms represent a significant technical challenge. This biological degradation leads to the deterioration of the operational properties of MWFs, induces severe corrosion, and causes accelerated mechanical wear of industrial equipment. It has been established that these processes directly impact the premature failure of precision components in modern computer numerical control (CNC) machines and result in a reduction of the overall quality of metal processing. To prevent the biological contamination of MWF circulation systems, research was conducted to evaluate the technological parameters and effectiveness of bactericidal Ta-Cu coatings produced via the magnetron sputtering method. The deposition process was performed using the EPOS-PVD-440 system across three distinct technological modes, utilizing high-purity tantalum and copper targets. The chemical composition of the resulting coatings was analyzed using a scanning electron microscope equipped with an energy-dispersive X-ray spectrometer (EDS). To assess the antimicrobial efficiency, a method of co-culturing the samples with bacterial suspensions followed by colony counting was employed. The research results confirmed the formation of a stable binary Ta-Cu system with an average mass concentration of 89.1% tantalum and 9.6% copper. All experimental samples exhibited significant bactericidal activity compared to the control group. Furthermore, the specific power consumption was calculated for various technological modes to evaluate the energy efficiency of the process. The findings justify that the application of bactericidal coatings to precision machine parts can extend the service life of MWFs and enhance the stability of the metalworking process.

10.48081/BGQF1912

2026

Issue 1

Modern requirements for the safe operation of tractors and self-propelled machines demand an accurate assessment of their lateral stability, especially when operating on slopes and rough terrain. The article discusses the design of a test bench equipped with a hydraulic tipping mechanism, which allows smooth adjustment of the platform angle and records the moment of stability loss for the equipment. The developed testing methodology includes a measurement algorithm, fixation of the vehicle position, registration of key parameters, and the construction of a mathematical model of the lifting mechanism, which enables calculation of the optimal placement of the hydraulic cylinder and ensures high measurement accuracy. The use of modern approaches in testing agricultural machinery allows reproducing real operating conditions and accounting for actual loads on assemblies and systems. At the same time, the assessment of the static stability angle on the bench is based on the coordinates of the center of gravity and the vehicle’s geometric parameters, such as track width, wheelbase, and mass distribution. Additionally, changes in wheel radii and displacement of the center of gravity vector are considered, allowing for accurate calculation of the stability moment when moving on a slope. Modern test benches are equipped with automated control systems, which allow conducting tests in automatic mode, recording dynamic and static parameters, and providing emergency shutdown in case of deviation from normal conditions. The use of energy-saving technologies in the bench design increases efficiency and reduces energy consumption. The development complies with GOST 12.2.019, GOST 33691-2015, and ISO 16231-2 requirements and can be used for developing normative testing methods for self-propelled machines and tractors.

10.48081/BGQF1929

2026

Issue 1

This article presents the theoretical dependence of the traction capacity of the drive drum of the belt conveyor on various factors with a variable coefficient of friction. The article provides an analysis of existing methods for calculating the traction capacity of the drive, which showed that the main thing is the correct choice of a reasonable value for the adhesion coefficient. The adhesion coefficient is taken from the recommendations based on the results of experimental studies. These values, presented in tabular form, do not take into account the full range of factors that affect the transmission of traction force to the belt by the drive drum, in particular the design parameters of the conveyor drive (drum diameter, belt width, lining thickness), the physical and mechanical properties of the belt and drum lining, as well as the modes of operation of the conveyor (belt speed). Studies show that the amount of traction with an increase in the radius of the drum or the width of the tape increases quite intensively according to a law close to linear. So, with an increase of one of these values by 5 times, the traction capacity increases by about 2.9 times. A less significant effect on traction is the change in stiffness of the belt E0. With an increase in E0 by 10 times, the traction capacity decreases by 2%. The amount of pulling power increases rapidly with the relative sliding angle of the belt.

10.48081/BGQF1931

2026

Issue 1

The efficiency of using motor transport largely depends on the operational reliability of its rolling stock. The reliability of motor vehicles depends on their proper design, a justified strategy for maintaining their operability during operation. The implementation of this strategy is largely determined by the use of modern information technologies, which include methods and means of diagnostic forecasting of reliability characteristics (failures) of vehicles. The use of modern technologies in the field of maintaining the operability of vehicles allows us to ensure their safety conditions, increase the degree of use of the durability of components, reduce downtime during repairs, reduce the consumption of spare parts and materials, etc. The paper presents a statistical analysis of the study of failures of elements of tractor vehicles of 2 brands. The studied failures of parts, units and assemblies of tractor vehicles made it possible to determine the laws of distribution of random variables of the emergence of a need for spare parts. The considered reasons for the occurrence of failures of elements and the use of spare parts of tractor vehicles made it possible to establish that the majority of reasons for the occurrence of malfunctions with asymmetric distribution laws reflect the imperfection of the design, violations of technological assembly processes, and the unsuitability of the rolling stock for operating conditions.

10.48081/BGQF1928

2026

Issue 1