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Wyszukujesz frazę "high-speed machining" wg kryterium: Temat

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    Wyświetlanie 1-10 z 10
    Tytuł:
    Feed drive simulation for the prediction of the tool path follow up in High Speed Machining
    Autorzy:
    Prevost, D.
    Lavernhe, S.
    Lartigue, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/1429192.pdf
    Data publikacji:
    2008
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    simulation
    high speed machining
    5-axis machining
    identification
    Opis:
    This paper deals with an advanced modeling of the feed drives of a five axis machine tool within the context of High Speed Machining. The management of the multi axes as well as high velocities causes problems to the set machine tool – Numerical Controller throughout the trajectory execution process. As a result, many errors are introduced during machining all process long affecting the surface quality. The paper aims at modeling the feed drive dynamics during trajectory follow-up including the current, the velocity and position loops as well as the feed forward terms, which characterize classical drives on actual HSM machines. It concerns translational axes as well as rotary axes. A procedure of identification of the virtual axis model are detailed for three and five axis trajectories presenting various types of geometrical discontinuities.
    Źródło:
    Journal of Machine Engineering; 2008, 8, 4; 32-42
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    High Performance Manufacturing Development Strategies in Aviation Industry
    Autorzy:
    Adamski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/971248.pdf
    Data publikacji:
    2009
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    perspective technologies
    manufacturing
    simulation
    High Speed Machining
    Opis:
    Foresight. as modern planning tool. "Clean Sky" project will effect in creating new technologies, which usage in aviation will improve fast progress of technique. The paper indicates the newest technologies or technologies which will develop in about 25 years. Aircraft industry future technologies for Polish conditions have been discussed. List of perspective technologies for aviation and engineering industry has been described. These technologies may be developed in Poland to increase economy competitiveness. New revolutionary materials for aviation industry have been presented. Machine tool technologies, especially Computer Numerical Control (CNC), High Speed Machining (HSM) have emerged as effective mechanisms in the aerospace, automotive, and die and mould industries. These new technologies are attractive for competitive manufacturing because of their technical advantages, i.e. a significant reduction in lead-time, high product accuracy, and good surface finish. However, HSM not only stimulates advancements in cutting tools and materials, it also demands increasingly sophisticated CAD/CAM software, and powerful CNC controllers that require more supportive technologies. This paper describes the computational requirement and cutting parameters of HSM, look ahead programming and simulation.
    Źródło:
    Journal of Machine Engineering; 2009, 9, 4; 5-25
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Using hsm technology in machining of thin-walled aircraft structures
    Autorzy:
    Bałon, Paweł
    Rejman, Edward
    Kiełbasa, Bartłomiej
    Smusz, Robert
    Powiązania:
    https://bibliotekanauki.pl/articles/2106191.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    aviation
    high-speed machining
    milling
    thin walled parts
    integral structure
    Opis:
    Subtracting manufacturing technologies have entered that realm of production possibilities which, even a few years ago, could not be directly adapted to direct production conditions. The current machines, i.e. heavy, rigid cutting machines using high spindle speed and high feed speed, allow for manufacturing very thin and relatively long parts for use in the automotive or aerospace industry. In addition, the introduction and implementation of new 70XX aluminium alloys with high strength parameters, as well as monolithic diamond cutting tools for special machining, have had a significant impact on the introduction of high-speed machining (HSM) technologies. The main ad-vantage of the applied manufacturing method is obtaining a very good smoothness and surface roughness, reaching even Sz = 6–10 μm and Sa <3 μm, and about four times faster and more efficient machining compared to conventional machining (for the beam part). Moreover, fixed and repeatable milling process of the HSM method, reduction of operational control, easy assembly of components and increase in the finishing efficiency compared to other methods of plastic processing (forming) are other benefits. The authors present a method using HSM for the manufacturing of aircraft parts, such as the chassis beam at the front of a commuter aircraft. The chassis beam assembly is made of two parts, front and rear, which – through a bolted connection – form a complete element replacing the previous part made using traditional technology, i.e., cavity machining, bending and plastic forming. The implementation of HSM technology eliminates many operations related to the construction of components, assembling the components (riveting) and additional controls during construc-tion and assembly.
    Źródło:
    Acta Mechanica et Automatica; 2022, 16, 1; 27--33
    1898-4088
    2300-5319
    Pojawia się w:
    Acta Mechanica et Automatica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Intelligent control system for HSM
    Autorzy:
    Vallejo, A.
    Morales-Menendez, R.
    Elizalde-Siller, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/384709.pdf
    Data publikacji:
    2009
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    Markov decision process
    optimization
    high-speed machining
    milling process
    neural network
    Opis:
    Next-generation of High-Speed Machining (HSM) systems demand advanced features such as intelligent control under uncertainty. This requires, in turn, an efficient administration and optimization of all system's resources towards a previously identified objective. This work presents an optimization system based on Markov Decision Process (MDP), where an intelligent control guides the actions of the operator in peripheral milling processes. Early results suggest that MDP framework can cope with this application, yielding several benefits, which are discussed in detail. Future work will address the full integration of the developed optimization scheme within a commercial machining center.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2009, 3, 3; 54-63
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Surface microhardening studies on steels after high feed milling
    Autorzy:
    Petrů, Jana
    Zlámal, Tomáš
    Špalek, František
    Čep, Robert
    Powiązania:
    https://bibliotekanauki.pl/articles/102402.pdf
    Data publikacji:
    2018
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    surface integrity
    microhardness
    high speed machining
    integralność powierzchni
    mikrotwardość
    obróbka z dużą prędkością
    Opis:
    The paper deals with the impact of high-speed machining production methods on the integrity of component surfaces. One has to point out that cutting conditions during machining have a significant impact on the final properties of surface and subsurface layers of the workpiece. The conclusion summarizes and analyzes the achieved results of experimental activities on stainless austenitic steel 1.4301, hardened tool steel 1.2343 and high-speed steel 1. 3344 (ASP 2023). The results of the work experimental parts demonstrate the influence of cutting parameters on selected surface integrity ones, specifically strengthening the surface and subsurface layers. The performed experiments show that microhardness of a surface layer of the machined material can be influenced by suitable cutting conditions and other cutting process parameters.
    Źródło:
    Advances in Science and Technology. Research Journal; 2018, 12, 2; 222-230
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    High speed machining of aluminium gear box without temperature stabilization
    Szybka obróbka aluminiowych obudów skrzyń biegów bez stabilizacji temperaturowej
    Autorzy:
    Silva, A.
    Mateus, C.
    Węgrzyn, T.
    Miros, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/374817.pdf
    Data publikacji:
    2010
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    stop aluminium
    stabilność wymiarowa
    obróbka szybkościowa
    aluminium alloy
    dimensional stability
    high speed machining
    Opis:
    At the present time both clutch and mechanism housings, which are the main components from automotive gear boxes, are made of special aluminium alloys. These alloys are extremely light when compared with steel, making them a perfect choice to mitigate the cars weight and machining costs. Nonetheless they possess a high thermal expansion coefficient, which can be considered a major disadvantage since it makes necessary to pay extraordinary attention to dimensional variations during the production cycle due to temperature deviations. High speed machining of precision components made of aluminium requests thus their temperature to become previously stable. This procedure is the only way to force dimensions to stay inside its tolerance intervals. The main purpose of the present work was to assess the possibility to avoid the use of special ovens to make the clutch housing temperature become stable prior to machining. The dimensional stabilization of 40 sample parts, pre-heated at three temperature levels, was accomplished through the use of this system. The achieved results were made possible by analysing the part's temperature at the machine's entrance, the machine's interior temperature, 35 measured dimensions and their tolerance intervals as well as the average temperature deviations of each of the five considered batches. By analysing the obtained results in detail it was possible to determine which dimensions show high sensitiveness to temperature (high correlation between dimension's variation and temperature). Among these dimensions we can point out the ones related with depth, since they display the highest deviations due to temperature. Being a work with practical application it was possible to confirm the benefit of using this methodology by achieving significant enhancements on production efficiency, energy savings and reduction on maintenance costs, through the application of small adjustments to the machining sequence and by adopting a systematic tuning of certain dimensions.
    Obecnie zarówno sprzęgło, jak i mechanizm przekładniowy, które są głównymi komponentami skrzyń biegów, umieszczone są w obudowie wykonanej ze specjalnych stopów aluminium. Stopy te są znacznie lżejsze w porównaniu ze stalą, powoduje to że są one doskonałym wyborem, by zmniejszyć wagę samochodów oraz 58 A.P. Silva, C.S. Mateus,, T. Wegrzyn, M. Miros koszty produkcji. Niemniej jednak materiały te posiadają wysoki współczynnik rozszerzalności cieplnej, który może zostać uznany ich główna wadą. Powoduje to że koniecznym stało się zwracanie dużej uwagi na utrzymanie wariantów wymiarowych podczas obróbki charakteryzującej się zmianami temperatury. Wysoka szybkość obróbki precyzyjnych komponentów wykonanych z aluminium spowodowała konieczność wcześniejszego ich podgrzewania w celu uniknięcia zmian temperatury podczas obróbki. Takie zabieg jest jedynym sposobem, aby zachować odpowiednią tolerancję wymiarową. Głównym celem niniejszej pracy była ocena możliwości, uniknięcia użycia specjalnych pieców wstępnie podgrzewających elementy przed obróbką w celu zapewnienia stabilizacji termicznej podczas obróbki. W pracy przeanalizowano możliwość zastosowania specjalnych komór z natryskowym systemem chłodzenia olejowego. Analiza osiągniętych wyników była możliwa poprzez pomiar temperatur na wejściu do maszyny oraz w jej wnętrzu. Pomiary przeprowadzono dla 35 próbek, których wymiary oraz tolerancję mierzono. Szczegółowa analiza pozwoliła stwierdzić, które z wymiarów wykazują się dużą wrażliwością na zmiany temperatury (wysoka korelacja między odmianą wymiaru i temperaturą). Pomiędzy wytypowanymi wymiarami najwrażliwszymi okazały się wymiary związane z głębokością. Uzyskane wyniki pozwoliły potwierdzić korzyści z używania opracowanej metody. Metoda ta pozwala na znaczne oszczędności energii oraz zwiększenie efektywności produkcji.
    Źródło:
    Transport Problems; 2010, 5, 3; 57-66
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    High speed milling in thin-walled aircraft structures
    Autorzy:
    Bałon, Paweł
    Rejman, Edward
    Smusz, Robert
    Szostak, Janusz
    Kiełbasa, Bartłomiej
    Powiązania:
    https://bibliotekanauki.pl/articles/117894.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Promocji Wiedzy
    Tematy:
    high speed machining
    milling
    thin-walled construction
    obróbka z dużą prędkością
    przemiał
    konstrukcja cienkościenna
    Opis:
    Aircraft structures are designed to mainly consist of integral elements which have been produced by welding or riveting of component parts in technologies utilized earlier in the production process. Parts such as ribs, longitudinals, girders, frames, coverages of fuselage and wings can all be categorized as integral elements. These parts are assembled into larger assemblies after milling. The main aim of the utilized treatments, besides ensuring the functional criterion, is obtaining the best ratio of strength to construction weight. Using high milling speeds enables economical manufacturing of integral components by reducing machining time, but it also improves the quality of the machined surface. It is caused by the fact that cutting forces are significantly lower for high cutting speeds than for standard machining techniques.
    Źródło:
    Applied Computer Science; 2018, 14, 2; 82-95
    1895-3735
    Pojawia się w:
    Applied Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    State of residual stresses after the process of milling selected aluminium alloys
    Autorzy:
    Kuczmaszewski, Józef
    Łogin, Waldemar
    Pieśko, Paweł
    Zagórski, Ireneusz
    Powiązania:
    https://bibliotekanauki.pl/articles/102158.pdf
    Data publikacji:
    2018
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    aluminium alloys
    high speed machining
    residual stresses
    stopy aluminium
    obróbka z dużą prędkością
    naprężenia szczątkowe
    Opis:
    The purpose of this paper was to analyse the structure and the state of residual stresses in the samples made of rolled AW-2024 and AW-7075 aluminium alloy plates, prior to machine cutting and after the process of milling under various machining conditions. The state of stresses was evaluated on the basis of measurements by means of sin2vF X-ray diffractometry and layer removal method. Furthermore, top layer microstructures were compared in half-finished product, machined product, and core material samples.
    Źródło:
    Advances in Science and Technology. Research Journal; 2018, 12, 1; 63-73
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Surface roughness investigation through interplay of cutting speed and thermal-assisted machining in high-speed machining of SKD11 steel
    Autorzy:
    Bui, Long-Vinh
    Mac, Thi-Bich
    Nguyen, Duc-Toan
    Powiązania:
    https://bibliotekanauki.pl/articles/28407323.pdf
    Data publikacji:
    2023
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    surface roughness
    high-speed milling
    thermal-assisted machining
    SKD11 steel
    Opis:
    This study aims to investigate the interplay between cutting speed and Thermal-Assisted Machining (TAM) concerning surface roughness during the high-speed machining of SKD11 steel. The integration of pre-cutting workpiece heating introduces a temperature factor that intricately affects surface roughness. The primary objective is to ascertain optimal speed and temperature ranges that synergistically enhance machining efficiency, curtail costs, and elevate surface quality. The experimental protocol initiates with room temperature milling of SKD11 steel, progressively elevating the temperature gradient to systematically appraise temperature's impact on surface roughness under both conventional and elevated cutting speeds. Subsequent experimentation, conducted within specific temperature thresholds, entails stepwise augmentation of cutting speed to elucidate the influence of high-speed conditions on surface roughness. The ensuing analysis meticulously examines the ramifications of distinct cutting speed intervals on surface roughness. Ultimately, the study furnishes pragmatic recommendations for judiciously selecting cutting speeds and heating temperature parameters across diverse machining scenarios.
    Źródło:
    Journal of Machine Engineering; 2023, 23, 4; 33--42
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Surface roughness of thin-walled components made of aluminium alloy EN AW-2024 following different milling strategies
    Autorzy:
    Kuczmaszewski, J.
    Pieśko, P.
    Zawada-Michałowska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/102470.pdf
    Data publikacji:
    2016
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    machining of aluminium alloys
    surface roughness
    High Speed Cutting
    High Performance Cutting
    thin-walled components
    Opis:
    The paper presents an analysis of surface roughness following milling of thin-walled components made of aluminium alloy EN AW-2024, taking into account the three different machining strategies and rolling direction of semi-finished product in the form of a plate combined with the milling feed. The aims of the study were to compare the results of machining using various technologies and show the best of them, providing the smallest roughness of the component following milling, as well as to determine the impact of rolling direction of the plate on the quality of the end surface. Measurement results of surface roughness parameters were provided information about the progress of the machining process.
    Źródło:
    Advances in Science and Technology. Research Journal; 2016, 10, 30; 150-158
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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