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Wyszukujesz frazę "Burian, D." wg kryterium: Autor

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    Wyświetlanie 1-4 z 4
    Tytuł:
    Milling tool deformation caused by heating during the cutting process
    Autorzy:
    Moravek, M.
    Burian, D.
    Brajer, J.
    Vyroubal, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/99636.pdf
    Data publikacji:
    2014
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    milling tool
    laser beam
    process
    thermal distortions
    Opis:
    The presented paper describes an experiment dealing with the deformation of a milling tool caused by heating during the cutting process. Based on the literature review an experimental procedure is designed to simulate heating of the milling tool during machining. The experimental heating of the milling tool is realized using a laser beam. The frequency of laser radiation and the length of each pulse are selected in order to simulate the real cutting process. The output power of the laser radiation is 10W or 20W. During the experiment deformation and temperature of the tool are measured. In the second part of the presented article an experiment is carried out investigating the heating and deformation of the milling tool during real machining of an aluminium alloy. The experiment consists of several test cycles, when a different amount of material is removed. Deformations of the tool and also of the machine tool are measured immediately after milling, and during cooling to ambient temperature. The results clearly show that there is a significant temperature rise of the milling tool during the cutting process, which mainly causes milling tool extension in the axial direction. The conclusion of the experiment is that the thermal deformation of the milling tool during machining cannot be neglected, as it can also be a source of certain errors.
    Źródło:
    Journal of Machine Engineering; 2014, 14, 2; 81-92
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A method of identification of complex cutting forces acting in unstable cutting process
    Autorzy:
    Bach, P.
    Polacek, M.
    Chvojka, P.
    Burian, D.
    Drobilek, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/99872.pdf
    Data publikacji:
    2014
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    chatter
    stability inaccuracy
    complex cutting forces
    forces identification
    Opis:
    The calculations of machining stability limit currently known do not provide a precise prediction of chatter-free cutting conditions. The inaccuracy is probably caused by mathematical models of dynamic forces acting on the cutting process during unstable machining. These models need to be modified. A new analysis of experimental data measured by one of the authors, M. Poláček, in the 1968-1974 period, forecasted an existence of several dynamic forces, which are mutually phase-shifted, thus complex. This fact has not been thoroughly investigated previously. As the assumed forces cannot be calculated from any equations, they must be identified experimentally. This research paper proposes a theoretical method of an experimental identification of these forces. The new model is intended to be used in the future for the development of a more accurate calculation of stability diagram.
    Źródło:
    Journal of Machine Engineering; 2014, 14, 4; 18-28
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of Third Generation Synchrotron Source to Studies of Non-Crystalline Materials: In-Se Amorphous Films
    Autorzy:
    Burian, A.
    Jabłońska, A.
    Burian, A. M.
    Le Bolloc'h, D.
    Metzger, H.
    Proux, O.
    Hazemann, J. L.
    Mosset, A.
    Raoux, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2030649.pdf
    Data publikacji:
    2002-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.10.-i
    61.43.Dq
    Opis:
    The local structure of vacuum evaporated In-Se amorphous films, containing 50, 60, and 66 at.% Se, was studied using differential anomalous X-ray scattering and extended X-ray absorption fine structure. Both intensity and absorption spectra were measured in the vicinity of the absorption K-edge of Se. The differential anomalous X-ray scattering data were converted to real space by the inverse Fourier transform yielding the differential radial distribution functions. The obtained results provide evidence for the presence of Se-In spatial correlations for In$\text{}_{50}$Se$\text{}_{50}$ and Se-In and Se-Se correlations for In$\text{}_{40}$Se$\text{}_{60}$ and In$\text{}_{34}$Se$\text{}_{66}$ within the first coordination sphere.
    Źródło:
    Acta Physica Polonica A; 2002, 101, 5; 701-708
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Interpretation of Differential Anomalous X-Ray Scattering Data for Amorphous Cd-As
    Autorzy:
    Burian, A.
    Lecante, P.
    Mosset, A.
    Galy, J.
    Tonnerre, J. M.
    Raoux, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1931688.pdf
    Data publikacji:
    1994-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.70.Dm
    61.10.-i
    Opis:
    The computational procedure, based on Warren's exact method for an amorphous sample with more than one atom, was developed to obtain the short-range order structural parameters from the differential anomalous X-ray scattering data, collected using the synchrotron radiation. The experimental differential radial distribution functions were fitted with the true distribution functions expressed in an analytical form and broadened by convolution with the pair functions. It was found that atoms in the amorphous Cd-As films remain almost tetrahedrally coordinated and the investigated alloys are chemically ordered.
    Źródło:
    Acta Physica Polonica A; 1994, 86, 4; 633-640
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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