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    Wyświetlanie 1-7 z 7
    Tytuł:
    Comprehensive analysis of the product’s operational properties formation considering machining technology
    Autorzy:
    Stupnytskyy, Vadym
    Hrytsay, Ihor
    Powiązania:
    https://bibliotekanauki.pl/articles/139963.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    functional-oriented technology
    operational properties
    wear resistance
    friction
    tribo-contact
    profile roughness parameters
    Opis:
    Product Lifecycle Management (PLM) system requires consideration and ensuring efficient operating conditions for the most loaded parts in the product, not only at the product’s design stage, but also at the production stage. Operational properties of the product can be significantly improved if we take into consideration the formation of the functional surfaces wear resistance parameters already at the planning stage of the technological process structure and parameters of the product’s machining. The method of constructing predictive models of the influence of the technological process structure on the formation of a complex of product’s operational properties is described in the article. The relative index of operational wear resistance of the machined surface, which is characterized by the use of different variants of the structure and parameters of this surface treatment, depends on the microtopographic state of the surface layer and the presence of cutting-induced residual stress. On the example of the eject pin machining it has been shown how the change in the structure of the manufacturing process from grinding to the turning by tool with the tungsten carbide insert affects the predicted wear resistance of the machined functional surface.
    Źródło:
    Archive of Mechanical Engineering; 2020, LXVII, 2; 149-167
    0004-0738
    Pojawia się w:
    Archive of Mechanical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hob wear prediction based on simulation of friction, heat fluxes, and cutting temperature
    Autorzy:
    Hrytsay, Ihor
    Stupnytskyy, Vadym
    Powiązania:
    https://bibliotekanauki.pl/articles/27309888.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    gear hobbing
    cutting process simulation
    wear resistance
    heat fluxes
    cutting
    temperature
    symulacja procesu cięcia
    odporność na zużycie
    strumień ciepła
    temperatura
    Opis:
    Based on comprehensive interrelated mathematical and graphical-analytical models, including 3D cut layers and simulation of contact, strain, force, and thermal processes during gear hobbing friction forces, heat fluxes, and temperature on the teeth of the hob surface are investigated. Various physical phenomena are responsible for their wear: friction on contact surfaces and thermal flow. These factors act independently of each other; therefore, the worn areas are localized in different active parts of the hob. Friction causes abrasive wear and heat fluxes result in heat softening of the tool. Intense heat fluxes due to significant friction, acting on areas of limited area, lead to temperatures exceeding the critical temperature on certain edges of the high-speed cutter. Simulation results enable identification of high-temperature areas on the working surface of cutting edges, where wear is caused by various reasons, and make it possible to select different methods of hardening these surfaces. To create protective coatings with maximum heat resistance, it is advisable to use laser technologies, electro spark alloying, or plasma spraying, and for coatings that provide reduction of friction on the surfaces – formation of diamond-containing layers with minimum adhesion properties and low friction coefficient on the corresponding surfaces.
    Źródło:
    Archive of Mechanical Engineering; 2023, LXX, 2; 271--286
    0004-0738
    Pojawia się w:
    Archive of Mechanical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comprehensive analysis of tribological factor influence on stress-strain and thermal state of workpiece during titanium alloys machining
    Autorzy:
    Stupnytskyy, Vadym
    She, Xianning
    Powiązania:
    https://bibliotekanauki.pl/articles/1845041.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    titanium alloy
    cutting
    coefficient of friction
    stress-strain state
    thermal state
    simulation of cutting
    tool wear
    stop tytanu
    obróbka
    współczynnik tarcia
    stan naprężeń i odkształceń
    stan termiczny
    symulacja obróbki
    zużycie narzędzi
    Opis:
    The article describes how different friction coefficients under certain cutting conditions and parameters affect the formation of the stress-strain and thermal states of the product when titanium alloy machining. A new research methodology is used for the study. Firstly, in the initial data for simulation, each time a different declared coefficient of friction is proposed, and every such task of the cutting process modelling is solved for various cutting parameters. The second stage analyzes how these coefficients influence the stress-strain and thermodynamic state of the workpiece and tool during cutting, as well as the tool wear dynamics. In the third stage of the study, ways for ensuring these analytically-grounded tribological cutting conditions are proposed. The analysis of different wear criteria in the simulation models of titanium alloys cutting is carried out. Experimental studies confirm simulation results.
    Źródło:
    Archive of Mechanical Engineering; 2021, LXVIII, 2; 227-248
    0004-0738
    Pojawia się w:
    Archive of Mechanical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simulation of loading and wear rate distribution on cutting edges during gears hobbing
    Autorzy:
    Hrytsay, Ihor
    Stupnytskyy, Vadym
    Topchii, Vladyslav
    Powiązania:
    https://bibliotekanauki.pl/articles/1845050.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    gear hobbing
    cutting process simulation
    wear resistance
    friction
    frezowanie kół zębatych
    symulacja procesu skrawania
    odporność na zużycie
    tarcie
    Opis:
    Results of complex mathematical and computer simulation of gear hobbing are given. A systematic approach to research allowed for the development of simulation models and sequencing of all aspects of this complex process. Based on the modeling of non-deformable chips, a new analytical method for analyzing hobbing has been proposed. The shear, friction and cutting forces at the level of certain teeth and edges in the active space of the cutter are analyzed depending on the cut thickness, cross-sectional area, intensity of plastic deformation and length of contact with the workpiece has been developed. The results of computer simulations made it possible to evaluate the load distribution along the cutting edge and to predict the wear resistance and durability of the hob cutter, as well as to develop measures and recommendations for both the tool design and the technology of hobbing in general. Changing the shape of cutting surface, or the design of the tooth, can facilitate separation of the cutting process between the head and leading and trailing edges. In this way, more efficient hobbing conditions can be achieved and the life of the hob can be extended.
    Źródło:
    Archive of Mechanical Engineering; 2021, LVIII, 1; 51-76
    0004-0738
    Pojawia się w:
    Archive of Mechanical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improved method of gear hobbing computer aided simulation
    Autorzy:
    Hrytsay, Ihor
    Stupnytskyy, Vadym
    Topchii, Vladyslav
    Powiązania:
    https://bibliotekanauki.pl/articles/140008.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    gear hobbing
    cutting process simulation
    kinematics of cutting
    Opis:
    Simulation studies of the hobbing process kinematics can effectively improve the accuracy of the machined gears. The parameters of the cut-off layers constitute the basis for predicting the cutting forces and the workpiece stress-strain state. Usually applied methods for simulation of the hobbing process are based on simplified cutting schemes. Therefore, there are significant differences between the simulated parameters and the real ones. A new method of hobbing process modeling is described in the article. The proposed method is more appropriate, since the algorithm for the momentary transition surfaces formation and computer simulation of the 3D chip cutting sections are based on the results of hobbing cutting processes kinematics and on rheological analysis of the hob cutting process formation. The hobbing process is nonstationary due to the changes in the intensity of plastic strain of the material. The total cutting force is represented as a function of two time-variable parameters, such as the chip’s 3D parameters and the chip thickness ratio depending on the parameters of the machined layer.
    Źródło:
    Archive of Mechanical Engineering; 2019, LXVI, 4; 475-494
    0004-0738
    Pojawia się w:
    Archive of Mechanical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comprehensive system for simulation of vibration processes during the titanium alloys machining
    Autorzy:
    Stupnytskyy, Vadym
    Xianning, She
    Novitskyi, Yurii
    Novitskyi, Yaroslav
    Powiązania:
    https://bibliotekanauki.pl/articles/27309878.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    titanium alloys
    cutting dynamic
    simulation
    adiabatic shear
    finite element analysis
    stopy tytanu
    dynamika skrawania
    symulacja
    analiza elementów skończonych
    Opis:
    Titanium alloys are difficult-to-machine materials due to their complex mechanical and thermophysical properties. An essential factor in ensuring the quality of the machined surface is the analysis and recommendation of vibration processes accompanying cutting. The analytical description of these processes for machining titanium alloys is very complicated due to the complex adiabatic shear phenomena and the specific thermodynamic state of the chip-forming zone. Simulation modeling chip formation rheology in Computer-Aided Forming systems is a practical method for studying these phenomena. However, dynamic research of the cutting process using such techniques is limited because the initial state of the workpiece and tool is a priori assumed to be "rigid", and the damping properties of the fixture and machine elements are not taken into account at all. Therefore, combining the results of analytical modeling of the cutting process dynamics with the results of simulation modeling was the basis for the proposed research methodology. Such symbiosis of different techniques will consider both mechanical and thermodynamic aspects of machining (specific dynamics of cutting forces) and actual conditions of stiffness and damping properties of the “Machine-Fixture-Tool-Workpiece” system.
    Źródło:
    Archive of Mechanical Engineering; 2023, LXX, 1; 85--105
    0004-0738
    Pojawia się w:
    Archive of Mechanical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization synthesis of technological parameters during manufacturing of the parts
    Autorzy:
    Kusyi, Yaroslav
    Stupnytskyy, Vadym
    Onysko, Oleh
    Dragašius, Egidijus
    Baskutis, Saulius
    Chatys, Rafal
    Powiązania:
    https://bibliotekanauki.pl/articles/2200927.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    reliability engineering
    FMEA
    FMECA
    technological damage
    technological graph of reliability
    Markov chain
    Opis:
    Technological ensuring the reliability of machine parts is realized by failing to reach the limited state of the elements of the technological system: machine – clamping device – metal-cutting tool-part. A method of optimization synthesis of parameters of technological processes of manufacturing machine parts has been developed. Testing the developed methodology, it was found that the metal cutting tool is Meanwhile, research has shown that metal cutting machine has the least influence on the formation of detailed quality-adjustable parameters from all the the weakest element of the technological system in terms of reliability and has the greatest impact on the quality of machined parts. elements of the process media "machine – clamping device – cutting tool". Finally, a concrete example is provided to demonstrate the effectiveness of the proposed method. The proposed technique has been successfully tested for the manufacturing process of the reduction-gear housing.
    Źródło:
    Eksploatacja i Niezawodność; 2022, 24, 4; 655--667
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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