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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, Volodymyr
The 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.
RESEARCH OF TEMPERATURE PROCESSES DURING DRILLING OF HOLES
(Lutsk: LNTU, 2025) Polinkevich, Roman; Zubovetska, Natalia; Redko, Rostyslav; Chetverzhuk, Taras; Zaleta, Olga; Valetskyi, Bogdan
The 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.
Automation of Warehouse Parameters Calculation and Its Sketch Design
(Cham: Springer, 2026-01-17) Povstianoi, Oleksandr; Valetskyi, Bohdan ; Zaleta, Olga; Redko, Rostyslav
Warehouses 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.

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