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    Wyświetlanie 1-3 z 3
    Tytuł:
    The replication method to analyze roughness of shaft, tool, and grinding wheel microgeometry
    Autorzy:
    Szawara, Paulina
    Ostrowski, Robert
    Powiązania:
    https://bibliotekanauki.pl/articles/1831348.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    replica
    geometric structure of surface
    replication method
    RepliSet F5
    replika
    struktura geometryczna powierzchni
    metoda replikacji
    Opis:
    This article presents the possibility of using the replication method to measure selected parameters of the surface geometry. The results of the tests obtained while measuring the replica and surface of the tested object are presented. The obtained results indicate the suitability of using RepliSet F5 to measure the roughness parameters (Ra and Rz), microgeometry tool, and grinding wheel. It has been proven that the replication method using the RepliSet F5 is suitable for chosen parameters of roughness and tool microgeometry measurements. However, it is not suitable for measuring the porosity of a grinding wheel.
    Źródło:
    Advances in Manufacturing Science and Technology; 2020, 44, 4; 129-133
    0137-4478
    Pojawia się w:
    Advances in Manufacturing Science and Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Influence of Modification of the Front Surface Geometry of the RFSSW Tool Sleeve on the Plasticization Effect and Stirring Materials During Joining Sheets Made of Aluminum Alloy 2024
    Autorzy:
    Łogin, Waldemar
    Śliwa, Romana E.
    Ostrowski, Robert
    Powiązania:
    https://bibliotekanauki.pl/articles/2174597.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    RFSSW
    RFSSW tools
    joint strength
    material mixing
    Opis:
    The paper presents the results of research and analysis of the effect of joining by the RFSSW method of alclad sheets made of Al2024 with an anodic oxide coating, with the using the tool with modified geometry of the front surface of inner sleeve. The different effects of the modifications made on the phenomenon of plasticization and stirring of materials in the process of creating a weld, microstructure of welds and mechanical strength of lap joints were shown. The tests were carried out on 1.27 mm thick sheets, with the use of an unmodified tool and modified tools with three variants of the geometry. The welds and the joints samples were subjected to metallographic and strength tests. It has been shown that the use of a properly selected modified geometry has a beneficial effect on the transport of materials to be joined in the joint zone (flow pattern of plasticized layers and the stirring effect) during the welding, which translates into the strength of the joints and the nature of the weld failure.
    Źródło:
    Archives of Metallurgy and Materials; 2022, 67, 4; 1435--1442
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on Forming Parameters Optimization of Incremental Sheet Forming Processf or Commercially Pure Titanium Grade 2 Sheets
    Autorzy:
    Szpunar, Marcin
    Trzepieciński, Tomasz
    Ostrowski, Robert
    Zwolak, Marek
    Powiązania:
    https://bibliotekanauki.pl/articles/2174594.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    incremental sheet forming
    forces
    fracture
    parameter optimization
    titanium
    Opis:
    This study aims to determine optimal forming parameters for Incremental Sheet Forming process Commercially Pure titanium Grade 2 sheets in terms of formability improvement, force reduction, and efficiency of forming. Based on the central composite design, data were collected during 20 runs and then variation analysis was performed. The experiments were performed on a 3 axis CNC milling machine equipped with a Kistler dynamometer plate. Subsequently, regression models have been developed to describe process responses by input factors. As crucial parameters, the relative velocity and step size of the tool that affect the forming force and the height of the fracture have been determined. Finally, the application of optimization algorithm has emerged optimal input factors in terms of selected multi-criteria goal. The results of this study suggest that there is a process window that allows the formation of 45° wall angle drawpieces of commercially pure titanium Grade 2.
    Źródło:
    Archives of Metallurgy and Materials; 2022, 67, 4; 1411--1418
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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