Journal of Engineering Sciences / Журнал інженерних наук
Permanent URI for this collectionhttps://devessuir.sumdu.edu.ua/handle/123456789/34326
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Item Geometric modeling of disc furrow profile(Sumy State University, 2025) Yablonskyi, P.; Rogovskii, I.; Virchenko, G.; Borek, K.; Volokha, M.; Golova, O.The provision of sufficient quantities of food products for the population of our planet is currently an urgent global problem. One of the main approaches to successfully solving these critical issues is to improve agriculture and its technical tools, particularly tillage discs. The latter’s popularity is due to modern progressive trends in minimal tillage. Compared to plows, discs significantly reduce energy costs, contribute to soil moisture preservation, and improve anti-erosion factors. In this regard, integrated CAD/CAM/CAE/PLM systems are productive tools for practically implementing the described tasks. However, their effective functioning is impossible without developing appropriate mathematical models. This scientific publication is devoted to solving such a problem by creating an analytical geometric apparatus for forming furrow profiles depending on available diameters and installation angles of tillage discs. Simultaneously, the current trends in the construction of agricultural machinery regarding the placement of disc working bodies on individual risers with the regulation of required angles of attack and deviations from vertical were considered. The developed mathematical calculations were illustrated by corresponding graphic images of furrow profiles for specific values of indicated quantities. This research also outlines promising directions for further research on the topic under consideration. Overall, the article aims to solve the problems using the integrated processing of structural and functional parameters and characteristics for agricultural discs.Item Optimal Layout of the Head Drive for a Self-Supporting Bucket Elevator of High Productivity(Sumy State University, 2024) Kurhan, V.; Sydorenko, I.; Kurgan, V.; Dudko, R.; Bershak, S.The article deals with bucket elevators of high productivity. The demand for grain crops is growing worldwide, requiring transportation, transshipment, and storage in huge volumes. Based on this, it is urgent to solve the problem of increasing the productivity of bucket elevators in the self-supporting version. The problem is that increasing performance requires increasing the drive’s power, leading to a significant weight increase. This imposes a limit on the height of the bucket elevator. A considerable weight at a high altitude significantly reduces the stability of the structure itself. For the most part, this problem was solved by limiting the height or productivity of the bucket elevator. The construction of a self-supporting bucket elevator, possible layouts of the head drive, and advantages and disadvantages were considered. Three bucket elevators with different heights, productivity, and belt width were selected to determine the optimal layout. Four drive options were calculated for each design, and a comparative analysis was carried out using a graphical method. The analysis showed that one of the biggest problems is the displacement of the center of mass relative to the central plane of the bucket elevator. As a result, means to ensure the smallest displacement coefficient relative to the vertical axis of the bucket elevator were presented. Advantages, disadvantages, and the possibility of constructive implementation of the layouts were also considered.Item Modeling of transportation process in a technological complex of beet harvesting machines(Sumy State University, 2023) Volokha, M.; Rogovskii, I.; Fryshev, S.; Sobczuk, H.; Virchenko, G.; Yablonskyi, P.Based on a critical review of known research and developments in recent years, the article presents a methodology for analyzing the capacity of the sugar beet sweeping-transport complex. The research aims to find rational use of machinery resources in the technological complex. A reloading method of transportation of root crops was considered. Its peculiarity was flexibility, adaptability to weather, and climatic and economic conditions during the gathering of sugar beet. Under favorable weather conditions and the availability of a sufficient number of vehicles, dug roots, removed from the combine from the field by a tractor semi-trailer, were reloaded into the heavy trucks. They were on the road from the edge of the field and transported to the plant. In case of changing conditions (in rainy weather, when the soil was too wet, or when there were not enough vehicles), a cleaner loader was added to the machines complex. After, the production process was carried out in a transshipment or flow-transshipment way. Beet harvesting and transportation of root crops were considered as work of the technological chain, which consists of three links: “field – beet harvester”, “beet harvester – tractor semi-trailer”, and “tractor semi-trailer – vehicle”. The basic steps of the capacity analysis allowed for determining the capacity of the 1st, 2nd, and 3rd links, their comparison, and subsequent analysis and selecting rational options to overcome the possible difference between their values.Item Design and manufacturing of polymer composite materials using quality management methods(Sumy State University, 2023) Берладір, Христина Володимирівна; Берладир, Кристина Владимировна; Berladir, Khrystyna Volodymyrivna; Mitalova, Z.; Павленко, Іван Володимирович; Павленко, Иван Владимирович; Pavlenko, Ivan Volodymyrovych; Trojanowska, J.; Іванов, Віталій Олександрович; Иванов, Виталий Александрович; Ivanov, Vitalii Oleksandrovych; Руденко, Павло Володимирович; Руденко, Павел Владимирович; Rudenko, Pavlo VolodymyrovychMany factors influence the design and manufacturing of products from polymer composite materials. The expert assessment method was applied in the article for the corresponding analysis. A cause-and-effect diagram was built as a result of a preliminary analysis of the influence of factors on the primary indicator of product quality indicators (e.g., wear resistance). Based on the expert assessment results and quality function deployment analysis, the most critical factors affecting wear resistance were obtained: polymer brand, filler shape and size, technological parameters of mixing, pressing, sintering, and mechanical processing. Their impact was studied to establish quantitative dependencies. A stable value of the wear resistance of the product in the manufacturing process can be ensured by timely adjustment of the mixing, pressing, and sintering modes. As a result of the structural analysis of the process of developing materials with predetermined properties at the enterprise according to the IDEF0 methodology, the importance of assessing the risks associated with the process of multi-criteria optimization of their main quality indicators was confirmed.Item Impact of technological system’s characteristics on the machining accuracy of bearing rings(Sumy State University, 2023) Halchuk, T.N.; Povstyanoy, O.Yu; Bembenek, M.; Redko, R.G.; Chetverzhuk, T.I.; Polinkevych, R.M.The article shows the influence of the technological system of an automated lathe, in particular cam chucks, on the accuracy of machining bearing rings for production conditions. The value of the deformation during machining, i.e., the non-circularity of the ring of a single row tapered roller bearing 32017X in outer diameter, was investigated. For the study, samples were selected that were processed under the same conditions directly in the production unit of PJSC “SKF Ukraine” without interference with the technological process. The use of replaceable floating cams in the chuck design was proposed to increase the accuracy and productivity of machining. Experimental studies have shown that the machined surface’s ovality depends on the chuck cams’ clamping force. The effectiveness of computer processing of statistical data on the accuracy control of engineering products was shown. Implementing machining accuracy control in production using the Minitab computer program was presented. It was proven that the quality of products is formed under the influence of the use of modern computer technologies at all stages of manufacturing and control of parts, which ensures research in a wide range of changes in technological parameters and comparison of individual studies with actual machining conditions on the machine, with the results of a sufficient level of reliability.Item Ways of intensification of grass seed production(Sumy State University, 2023) Spirin, A.; Borysiuk, D.; Tsurkan, O.; Tverdokhlib, I.; Veselovska, N.; Edl, M.The main reason that restrains the development of seed production of perennial grasses is losses during harvesting, which depend on the agrotechnical properties of plants and the imperfection of existing means. There are no special grass seeds yet. Therefore, serial equipment with special devices is recommended for their collection. There are enough options for technologies for collecting grass seeds. In the article, six main options of technologies used in production were analyzed and compared according to the main indicators. The best results of a comprehensive comparison are those technologies that process the collected seed mass into a stationary one. The design of a device for wiping the seed mass was proposed to develop this direction of grass seed collection technologies. The article presents theoretical and experimental research results that allowed improving these devices based on rational design and operating parameters. Another way to intensify the production process of leguminous grass seeds is to combine the technological processes of wiping and separation in one machine. The analysis of various separating devices showed that machines with a rotating screen of cylindrical or conical shape are best suited for this purpose. The conducted theoretical studies confirmed the hypothesis that extending the time the material stays on the sieve by using a conical surface increases the yield of clean seeds and contributes to uniform loading of the sieve surface, improving the quality of the initial material. According to the research results, the design of the grating-separating block was proposed for the implementation of this scientific hypothesis. The theoretical and experimental studies presented in the article will allow for significantly intensifying the process of collecting grass seeds and outlining the further development of scientific research in this field.Item Design in modern information systems by applying cloud technologies(Sumy State University, 2023) Tigariev, V.; Lopakov, O.; Rybak, O.; Kosmachevskiy, V.; Cioată, V.G.In this study, the general algorithm and technology of design in advanced computer-aided design (CAD) software of the CAD-in-the-Cloud type using an information model (IM) was discussed in detail. Applying design systems of this type increases productivity and quality of the development and enables group work on the project. The proposed information model consists of three main components – working with Autodesk Fusion 360 on a computer, working with cloud capabilities, and designers’ collaboration through the cloud. Nevertheless, some IM elements may be missing in a particular design, or there can be options for applying the proposed steps in the design process. Developing customized respiratory protective equipment (face masks) in Autodesk Fusion 360 CAD family was considered as an example of the suggested IM application. Modern design and producing technologies enable the creation of masks according to individual anatomical characteristics of the human face. In this paper, the protective mask was created by applying modern cloud computing technologies using information models. Information models were adapted to the process of protective mask design. The model of a human headform was developed using the 3D scanning method. After applying retopology tools, a basis of the mask frame was created on the surface of a 3D model of a head. Building a solid model and testing the mask fame configuration under mechanical stresses due to facial expression changing was carried out in Autodesk Fusion 360 CAD software. Finally, the cloud module of the generative design was applied to determine the filtering element configuration.Item Application of FMEA for assessment of the polymer composite materials quality(Sumy State University, 2021) Rudenko, S.; Берладір, Христина Володимирівна; Берладир, Кристина Владимировна; Berladir, Khrystyna Volodymyrivna; Trojanowska, J.; Varenyk, S.; Shvetsov, D.; Kravets, V.The paper is devoted to developing a methodology for failure mode and effects analysis on the example of assessment of defects that occur during production and operation of polymer composite materials and industrial products from them. The paper uses the Ishikawa method to illustrate and further analyze the cause of defects in reinforced polymer composite material. The Ishikawa diagram was constructed and analyzed using the method of causal analysis. The types and consequences of failures and defects for polymer composite materials are analyzed. For each type of defect, the value of the priority number of risks is calculated. For the most critical defect, measures to reduce potential defects are proposed. Suggestions for improving the detected defective zones in the structures of polymer composites in the analysis process are given.