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Wyszukujesz frazę "cutting tools" wg kryterium: Temat

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    Wyświetlanie 1-3 z 3
    Tytuł:
    End milling of Ti-48Al-2Cr-2Nb under high-feed conditions
    Autorzy:
    Finkeldei, Daniel
    Bleicher, Friedrich
    Powiązania:
    https://bibliotekanauki.pl/articles/99517.pdf
    Data publikacji:
    2019
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    cemented carbide cutting tools
    titanium aluminides
    specific cutting force
    high feed machining
    Opis:
    Gamma titanium aluminides are fast developing materials and particularly in use for aerospace and automotive components. Due to the high cutting forces and raised cutting temperatures achieved during milling of this material, tool-wear is a crucial factor. Thus, increasing of the cutting speed leads to a significant rise of the cutting temperature. On the one hand, the implementation of innovative cooling strategies can reduce the heat flux in the cutting tool. On the other hand, analysing of the heat generation during the cutting process can lead to improved machining strategies. Previous research attempts assess microstructural and chip formation, as well as tool-wear in finish milling of this material. However, few have investigated the optimal cutting strategies in roughing and finishing of titanium aluminides. In this study, the milling operation under high feed rate should be investigated and the potential to improve chip removal rate and tool life should be determined.
    Źródło:
    Journal of Machine Engineering; 2019, 19, 2; 63-72
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simulation of single grain cutting using SPH method
    Autorzy:
    Ruttimann, N.
    Buhl, S.
    Wegener, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/100039.pdf
    Data publikacji:
    2010
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    single grain cutting
    engineered grinding tools
    smooth particle hydrodynamics
    Opis:
    So-called Engineered Grinding Tools (EGT) have been developed in order to satisfy the industry's demand for more efficient and cost-effective grinding tools, which differ from classic grinding tools by placing and brazing single abrasive grains in a predefined pattern onto the grinding tool body. Single grain cutting simulations form an important part towards an advanced understanding of the engineered grinding process. Cutting simulations with FE Methods encounter problems arising from large deformation and material separation. These can be overcome using meshless methods. In this work, a Smooth Particle Hydrodynamics (SPH) Method is used to model the single diamond grain cutting, which can be used as the basis process for physical simulation of the grinding process. As results the influence of the grain geometry, grain orientation and grain placement on the cutting forces, the burr generation and the chip removal rate are presented. It is shown that the cutting forces for a given grain geometry as well as the burr generation are heavily influenced by the orientation of the minor and the main cutting faces. Also cutting in material being work hardened by preceding grains, is simulated in order to be able to synthesize the grinding process from single grain cutting.
    Źródło:
    Journal of Machine Engineering; 2010, 10, 3; 17-29
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of friction incorporating tool wear effect
    Autorzy:
    Grzesik, W.
    Żak, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/100206.pdf
    Data publikacji:
    2014
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    friction
    wear
    cutting
    silicon nitride ceramic tools
    spheroidal cast iron
    Opis:
    This paper compares friction for orthogonal and non-orthogonal models developed for chamfered ceramic tools with a large negative rake angle. The new non-orthogonal friction model was tested for the machining of spheroidal cast iron (SCI) using coated nitride ceramic inserts. Friction coefficients were determined on the rake and flank face for fresh and worn ceramic inserts using the values of force components recorded during tool wear tests at different cutting speeds. In particular, the friction and normal forces acting on the rake and flank faces were computed. It was revealed that friction coefficients at the tool-chip and tool-workpiece interfaces change substantially with the tool wear progress and differ from that determined for orthogonal friction model.
    Źródło:
    Journal of Machine Engineering; 2014, 14, 2; 5-15
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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