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Wyszukujesz frazę "Žarnovský, Jozef" wg kryterium: Autor

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    Wyświetlanie 1-3 z 3
    Tytuł:
    Hazard analysis and risk assessment in metal cutting process
    Autorzy:
    Kotus, Martin
    Drlička, Róbert
    Mikuš, Rastislav
    Žarnovský, Jozef
    Powiązania:
    https://bibliotekanauki.pl/articles/2064921.pdf
    Data publikacji:
    2019
    Wydawca:
    STE GROUP
    Tematy:
    safety
    threat
    risk rate
    manufacturing plant
    band saw
    Opis:
    The paper deals with the issue of occupational health and safety in a metalworking manufacturing organization. Hazard and threat have been defined when cutting metal materials with a band saw. We assessed the risk by an extended point method, where we determined the risk rate values. In most cases of sawmill work, we found a “moderate” or “negligible” risk. The highest, ‘serious’ risk we found in a possible electric shock. In this case, we have also taken the necessary actions. As a precaution, we have also proposed safety measures for other threats.
    Źródło:
    Multidisciplinary Aspects of Production Engineering; 2019, 2, 1; 382--391
    2545-2827
    Pojawia się w:
    Multidisciplinary Aspects of Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of Physical and Mechanical Properties of Steel During Grinding and Sharpening
    Autorzy:
    Biały, Witold
    Ivanova, Tatiana Nikolaevna
    Žarnovský, Jozef
    Ružbarský, Juraj
    Powiązania:
    https://bibliotekanauki.pl/articles/2064901.pdf
    Data publikacji:
    2020
    Wydawca:
    STE GROUP
    Tematy:
    steel 8KHF
    sharpening
    edge
    thermal deformation
    structural transformations
    thermal process
    Opis:
    A direct influence on the physical and mechanical state of the surface layer of wedge-shaped plates made of 8KHF steel is exerted by heat generation processes developing in the zone of a high-speed thermal process. Research on the influence of the parameters of a high-speed thermal process on the change in the structure of 8KHF steel (GOST 5950-2000 Russia, standard PN/H 85023 brand NCV1 Poland) was fulfilled. It allowed studying the nature of the change in the microstructure depending on short-term heating to various temperatures and rapid cooling. As a result, critical points of the beginning and the end of structural transformations during heating were determined. Research on thermal processes in a high-speed thermal process made it possible to establish regularities of influence of cutting speed, source speed, contact area, coolant properties and heat transfer coefficient on the temperature and rate of thermal processes in surface layers, as well as their impact on the depth of heating to a certain temperature. The study also allowed us to show the relationship between temperature and rates of heating and cooling. The solution to this problem, taking into account the action of the cooling fluid, gives the opportunity to bring the picture of the development of thermal processes closer to real conditions and makes it possible to reasonably predict the structural state of the surface layer of wedge-shaped parts made of 8KHF steel under various conditions of a high-speed thermal process.
    Źródło:
    Multidisciplinary Aspects of Production Engineering; 2020, 3, 1; 128--140
    2545-2827
    Pojawia się w:
    Multidisciplinary Aspects of Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research and development of laser engraving and material cutting machine from 3D printer
    Autorzy:
    Durna, Antonin
    Fries, Jiri
    Hrabovsky, Leopold
    Sliva, Ales
    Zarnovsky, Jozef
    Powiązania:
    https://bibliotekanauki.pl/articles/410205.pdf
    Data publikacji:
    2020
    Wydawca:
    STE GROUP
    Tematy:
    3D printer
    CNC machine
    engraving
    laser
    Opis:
    This article deals with the adjustment of a 3D printer for laser engraving and material cutting. The print head can be fitted with a solid laser diode module, which achieves a compact size while retaining its useful power. Two paths lead to the use of such a concept. It is possible to equip the existing print head with a module, which also brings a number of disadvantages such as, for example, the reduction of the printing space or the need for a suitable mounting design. A more elegant solution is to consider this in the design of a 3D printer and design a system to exchange the print heads for 3D printing and laser engraving. Such a solution allows full utilization of the workspace and simple installation of the effector for the required type of work. According to the installed power of the laser diode, it is possible not only to engrave but also cut material such as thin wood, veneer or acrylic glass. The use of such a machine is not only for graphic elements but for the creation of various stencils, boxes or simple models, which can be made up of plastic-burning pieces. The laser module is controlled by a driver, which is designed for the device. This is connected to a 3D printer control board. It is, therefore, necessary for the control board to have at least two pins, which can be controlled after adjusting the control firmware. Most laser modules are normally equipped with an adjustable lens, which is used to concentrate the focus of a laser for the given distance against the worktop. Thus, the modified 3D printer can perform its function as a multi-purpose CNC machine, while a basic platform similar for both devices is used.
    Źródło:
    Management Systems in Production Engineering; 2020, 1 (28); 47-52
    2299-0461
    Pojawia się w:
    Management Systems in Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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