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    Wyświetlanie 1-5 z 5
    Tytuł:
    Design optimization of the Petri net-based production process supported by additive manufacturing technologies
    Autorzy:
    Patalas-Maliszewska, Justyna
    Wiśniewski, Remigiusz
    Topczak, Marcin
    Wojnakowski, Marcin
    Powiązania:
    https://bibliotekanauki.pl/articles/2173645.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    additive manufacturing technology
    manufacturing processes
    Petri nets
    process modelling
    verification
    validation
    optimization of production process supported by AM technologies
    technologia wytwarzania przyrostowego
    proces produkcji
    sieci Petriego
    modelowanie procesów
    weryfikacja
    walidacja
    optymalizacja procesu produkcyjnego wspierana technologiami AM
    Opis:
    In the era of smart manufacturing and Industry 4.0, the rapid development of modelling in production processes results in the implementation of new techniques, such as additive manufacturing (AM) technologies. However, large investments in the devices in the field of AM technologies require prior analysis to identify the possibilities of improving the production process flow. This paper proposes a new approach to determine and optimize the production process flow with improvements made by the AM technologies through the application of the Petri net theory. The existing production process is specified by a Petri net model and optimized by AM technology. The modified version of the system is verified and validated by the set of analytic methods safeguarding against the formal errors, deadlocks, or unreachable states. The proposed idea is illustrated by an example of a real-life production process.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 2; art. no. e140693
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hybrid additive and subtractive manufacturing processes and systems: a review
    Autorzy:
    Grzesik, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/99525.pdf
    Data publikacji:
    2018
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    hybrid manufacturing
    CNC machining
    additive machining
    laser cladding
    repair technology
    Opis:
    This review paper highlights the hybrid manufacturing processes which integrate the additive and subtractive processes performing on one hybrid platform consisting of the LMD (laser metal deposition) unit and CNC machine tools. In particular, some important rules and advantages as well as technological potentials of the integration of different AM technique and finishing CNC machining operations are discussed and overviewed. Some representative examples such as formation of difficult features around the part periphery, deposition of functional layers and coatings and repair of high-value parts in aerospace industry are provided. Some conclusions and future trends in the implementation of hybrid processes are outlined.
    Źródło:
    Journal of Machine Engineering; 2018, 18, 4; 5-24
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dimensional-Shape Verification of a Selected Part of Machines Manufactured by Additive Techniques
    Autorzy:
    Bernaczek, Jacek
    Budzik, Grzegorz
    Dziubek, Tomasz
    Przeszłowski, Łukasz
    Wójciak, Kinga
    Powiązania:
    https://bibliotekanauki.pl/articles/2201895.pdf
    Data publikacji:
    2023
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    dimensional accuracy
    shape accuracy
    coordinate measurements
    3D scanning
    additive manufacturing
    FFF technology
    PolyJet technology
    Opis:
    The publication covers the complex process of analyzing the accuracy of mapping models produced in AM (Additive Manufacturing) processes with a thermoplastic material – FFF (Fused Filament Fabrication) and polymerization of light-curing resin – PolyJet. The research was conducted with the use of an advanced optical measuring system – the GOM Atos 3D scanner. The part selected for the research in question was the water pump body as a representative example of an element with adequate dimensional and shape conditions (high degree of folding and geometric differentiation) allowing, based on the results of coordinate measurements determined in the research process, to define the potential area of application of AM models made of thermoplastic material and resin hardened with UV light. The performed tests showed the accuracy of individual AM methods at a level within the range declared by machine manufacturers. However, the PolyJet body is characterized by a much higher accuracy of the shape mapping compared to the FFF body. The dimensional accuracy is also higher for the resin model in relation to the thermoplastic model, which results primarily from the thickness of the elementary layer of the model material applied by the printing module defined for individual incremental processes – 16 μm for RGD 720 and 0.2 mm for ABS. Detailed elaboration and analysis of the research results are presented in this publication.
    Źródło:
    Advances in Science and Technology. Research Journal; 2023, 17, 1; 46--57
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of a novel technology for rapidly rotating systems for medical technology
    Autorzy:
    Klaeger, U.
    Schmucker, U.
    Galazky, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/406893.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    laboratory centrifuges
    carbon fiber rotors
    composites
    lightweight
    hybrid systems
    additive manufacturing
    medical technology
    Opis:
    Rapidly rotating systems such as centrifuges are widely used in medicine and laboratories to efficiently separate different constituents of liquids. Rotors, which hold sample containers, are an essential part of centrifuges. Since they are subjected to extreme mechanical loads, rotors are one of a centrifuge’s core safety components. Their deficits served as the point of departure for the development of a novel manufacturing technology, which is based on carbon fiber-reinforced polymers (CFRP). Its supporting structure is entirely in the loading plane, thus enabling the rotor to absorb higher centrifugal forces while requiring the same amount of material. The new design concept for the load-bearing structure includes a geodesically molded annular support member. It transmits forces better than present products and increases rigidity. In order to eliminate the known problems with obtaining the necessary manufacturing quality of hollow fiber composite bodies, the authors developed the process of centrifugal infusion. Their proposed solution is based on generating higher gravitation forces, thus effectively eliminating detrimental gas pockets and simultaneously optimizing surface quality and impregnation.
    Źródło:
    Management and Production Engineering Review; 2013, 4, 4; 28-34
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of Torsional Strength of Pa2200 Material Shape Additively with the Selective Laser Sintering Technology
    Autorzy:
    Bernaczek, Jacek
    Dębski, Mariusz
    Gontarz, Małgorzata
    Grygoruk, Roman
    Józwik, Jerzy
    Kozik, Bogdan
    Mikulski, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/2201927.pdf
    Data publikacji:
    2023
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    torsional strength
    PA2200 powder
    additive manufacturing
    SLS technology
    SLS
    Selective Laser Sintering
    optical measurements
    3D scanning
    Opis:
    The purpose of the undertaken research work is to analyze the torsional strength of standard samples with a circular cross-section, produced additively using the SLS (Selective Laser Sintering) technique – sintering PA2200 polyamide powders. The studies conducted so far have not included a static torsion test, the results of which are crucial for parts such as machine shafts, hubs, couplings, etc. Hence the idea of conducting the research in question. The samples were made in different settings relative to the machine's working platform and subjected to post-processing in two variants – by water-soaking and furnace-heating – in order to determine the influence of the orientation of the model in the manufacturing process and the type of post-processing on torsional strength. The produced samples were additionally subjected to a preliminary dimensional and shape verification due to the significant impact of the accuracy of the models in the SLS process on the operation of the above-mentioned machine parts. Based on the analysis of the test results, it was found that the highest torsional strength was determined for the furnace-heated samples. In addition, the highest mapping accuracy was found for models positioned vertically in relation to the machine's working platform.
    Źródło:
    Advances in Science and Technology. Research Journal; 2023, 17, 2; 12--24
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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