Кафедра прикладної механіки та мехатроніки
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Item type:Наукова стаття, EXPERIMENTAL STUDY OF THE PROCESS OF BORING MACHINE PARTS USING A CUTTER EQUIPPED WITH TENSOR SENSORS(Ivano-Frankivsk National Technical University of Oil and Gas, 2025) Zubovetska, Natalia; Redko, Rostyslav; Chetverzhuk, Taras; Sklyarov, Ruslan; Shanaida, VolodymyrThe article presents a methodology for experimental investigation of the boring process of non-rigid helical machine parts. Based on an analysis of recent research in this field, requirements are estab-lished for the physicomechanical properties of the workpiece material, technological and design param-eters of helical parts, and their manufacturing technologies. Experimental results are described, particu-larly focusing on boring forces.During the machining of holes with small internal diameters in non-rigidhelical workpieces made of materials that form continuous chips, friction between the chips and the machined surface and chip jamming inside the hole are observed. Accordingly, the quality of the ma-chined surface depends on the chip curling behavior.A special boring tool setup with strain gauge sen-sors was developed for precise cutting force measurement. A tool with a replaceable cubic boron nitride (CBN) insert was used to create different internal profiles and to study the influence of tool geometry on the boring process. To ensure measurement accuracy, the strain gauges were calibrated on a custom test rig using lever systems in a static position.The experimental study established and optimized rec-ommended feed values relative to specified surface roughness and cutting depth parameters. The re-search also revealed that cutting speed must be maintained within certain limits; otherwise, the helical surface may deform or bend. Resulting graphs demonstrated patterns of boring parameters: cutting forces decrease with increasing cutting speed, while forces increase with higher feed rate, cutting depth, and spiral thickness.Item type:Наукова стаття, RESEARCH OF TEMPERATURE PROCESSES DURING DRILLING OF HOLES(Lutsk: LNTU, 2025) Polinkevich, Roman; Zubovetska, Natalia; Redko, Rostyslav; Chetverzhuk, Taras; Zaleta, Olga; Valetskyi, BogdanThe paper addresses an axisymmetric thermophysical problem occurring during deep-hole drilling, based on a proposed mathematical model for temperature calculation using the heat source method and the principles of spatial- temporal correspondence and local influence. The dependencies of the thermal process were determined, taking into account the mutual positioning of the cutting tool and the part, the material of the workpiece, the presence of cooling with cutting fluid, cutting conditions, chip removal, and the duration of the drilling operation itself. This is particularly important for deep drilling, where the heat source is continuously displaced. It was established that the calculation of the temperature field in the workpiece depends on the action of a ring- shaped heat source with a uniform heat release intensity distribution. Theoretical analysis showed that the maximum temperature should not exceed 300 °C (without lubricating and cooling fluid) and 180 °C (with lubricating and cooling fluid), respectively. Standard chromel-alumel thermocouples (temperature range −100 °C to +1000 °C) were used for temperature measurement. Deep-hole drilling experiments were performed on parts made of Steel 45 (analogous to C45E and Ck45 according to the EU standard EN 10083-2) with diameters of 10 mm and 20 mm, using special deep-drilling tools. The machining was carried out on a universal lathe model 16K20, modified for deep drilling. The temperature in the tool- workpiece contact zone and the temperature distribution within the workpiece (temperature gradient) were calculated. The adequacy of the proposed mathematical model was confirmed, as the calculated temperature values corresponded well with the experimental data.Item type:Наукова стаття, Theoretical and Experimental Studies of the Properties of Porous Permeable Materials Obtained from Industrial Waste(2022-05-25) Povstyanoy, Oleksandr; Imbirovich, Nataliya; Tkachuk, Valentyna; Redko, RostyslavThis article theoretically and experimentally investigates the scientific and technical problem of using multilayer porous permeable materials from industrial waste with controlled functional and technological characteristics by predicting the composition, structure, properties using computer information technology. These porous permeable materials (PPM) from industrial waste are suitable for the purification of technical liquids and gases, which has increased the efficiency of using products in various fields of mechanical engineering. The method of computer modeling proposed by the authors will allow not only to determine the porosity distribution of the filter material but also to determine the relationship between technological and structural parameters. The results of this scientific work are used to develop porous permeable products - filters - for the purification of technical, industrial water, lubricants, and fuels from mechanical impurities contaminants. Developed multilayer porous permeable materials have a higher coefficient of permeability, resource, and dirt capacity with similar single-layer.Item type:Наукова стаття, INVESTIGATION OF CUTTING FORCE DURING BORING OF SCREW NON-RIGID MACHINE PARTS(Lutsk: LNTU, 2023-05-24) Povstyanoy, Oleksandr; Redko, Rostyslav; Polinkevich, Roman; Chetverzhuk, Taras; Zaleta, OlhaIn the work, the peculiarities of boring of screw workpieces are described. The regularities of the processes of boring screw non-rigid parts have been established. The specifics of the design of the equipment for boring screw non-rigid parts and the expediency and prospects of using screw workpieces are substantiated. It is based on theoretical and experimental studies. A theoretical generalization and a new solution to the scientific and technical problem expressed in the development and creation of technological processes for processing non-rigid screw workpieces, are presented. This will make it possible to ensure the expansion of technological capabilities and the improvement of technical and economic parameters. Calculations were carried out using a package of applied statistical programs for processing and analyzing the results of experimental studies for a PC. According to these results, the dependences of the response surfaces of the optimization parameter and the two-dimensional section of the response surfaces were constructed and analyzed for a visual representation of the results of the experimental studies. The dependences of the change in cutting force on feed and cutting depth were constructed and analyzed. The dependences of the optimization parameter, that is, the dependence of the cutting force on the change of one input factor with a constant value of the other two factors, were also substantiated. After carrying out research using the program «Statistika», a two-dimensional section of the response surface of the dependence of the cutting force on the feed and depth of cut and the response surface of the dependence of the cutting force on the feed and depth of cut were constructed. The obtained experimental broken line was built based on the results of the conducted research. Approximation of it was carried out according to known standard methods, while the amount of deviation (mismatch) was determined by the method of least squares.Item type:Наукова стаття, Automation of Warehouse Parameters Calculation and Its Sketch Design(Cham: Springer, 2026-01-17) Povstianoi, Oleksandr; Valetskyi, Bohdan ; Zaleta, Olga; Redko, RostyslavWarehouses in enterprises are a key element in ensuring the stability of production activities, particularly in terms of efficient supply chain and production process management. Proper selection and accurate calculation of warehouse parameters help reduce storage costs, which is an important and relevant task. Therefore, the aim of this study is to analyze warehouse system parameters and develop a computer program for their automated calculation. The practical significance of this task is justified by the widespread practice of warehouse use in various industries and the necessity for their rational operation. Warehouse Calculator is the new software, which create a sketch of a warehouse with pallet racks according to the specified input and output parameters. Its main task is to generate a database of calculation results and to build a sketch for the warehouse design documentation. The program algorithm calculates the warehouse area, its geometric dimensions (length, width, and height), considering user-input values and sizes, which are described in this paper. It also includes the calculation of columns. When starting a new calculation, standardized data is displayed by default in all fields. These values can be adjusted based on the individual problem and modified at any stage of its solving.Item type:Наукова стаття, Automation of Optimization Synthesis for Modular Technological Equipment(Sumy State University, 2023-05-22) Povstyanoy, Oleksandr; Zaleta, Olha; Redko, RostyslavTechnological equipment design based on functionally modular methods is widely used in various technical fields. The designed object can be a technological machine, a production line, or a manufacturing complex. Special attention is paid to the optimization of its structure. The sequence of performing all stages of the optimization synthesis problem is presented in the article. To find a solution to this task, the developer should apply the complete or directed search of acceptable structure options and determine the best one using some optimization criteria to evaluate their quality. It can be simple enough if the designed technical system structure consists of no more than several elements. For example, if the number of alternative elements options is several dozen, it takes much time to accomplish the search correctly. Thus, the greater the number of components considered, the more difficult it is to do all the necessary calculations manually. In this case, machine resources should be involved. This scientific work aims to identify procedures of optimization synthesis that can be automated. Also, appropriate software has to be developed. Our computer program is based on the algorithm of a complete search of all options of the technical system structure. It can process an extensive array of input data and produce all possible and logically permissible results in the form the designer can analyze using the Pareto method to choose the best one. This software can be used for any technical system with a modular structureItem type:Наукова стаття, Impact of Technological System’s Characteristics on the Machining Accuracy of Bearing Rings(Sumy State University, 2023-11-10) Povstyanoy, Oleksandr; Halchuk, Tetyana; Redko, Rostyslav; Polinkevych, RomanThe 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 type:Наукова стаття, Numerical Evaluation of the Properties of Highly Efficient Titanium Porous Materials(Cham: Springer Nature Switzerland, 2023-08-21) Povstyanoy, Oleksandr; Imbirovich, Nataliya; Redko, Rostyslav; Redko, Olha; Savaryn, PavloAn exciting combination of such properties as high strength, low den- AQ1 sity, corrosion resistance, and biocompatibility characterizes titanium. However, the widespread use of titanium at the industrial level has not yet been achieved due to its high extraction and production costs. Therefore, titanium is increasingly used in sectors with high demand, such as the aerospace industry or the production of biomedical devices, where the final high cost is not a major factor. It is believed that processing titanium and its alloys using powder metallurgy (PM) methods is a significant way to reduce the cost of manufacturing titanium products. It also provides the opportunity to develop new alloys that are difficult to obtain using traditional technologies. This work is devoted to processing titanium powder from biomedical production waste using various PM methods. It aims to research the processing of almost pure, chemically homogeneous, and finegrained titanium-based components. In particular, the main properties that can be achieved (porosity, microstructure, and mechanical properties) and the creation of highly efficient porous materials by advanced methods of isostatic pressing are presented.