Univerzitná knižnica - Vedecké odborné časopisy

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    Blechsschneiden unter Anwendung von Materiallwärmung
    (University of Žilina, 2024) Moravec, Ján
    In the paper, the theoretical part presents the issue of metal cutting. The experimental part deals with the investigation of the influence of temperature during the application of heating. the text of the paper is supplemented by a discussion and at the end of the paper there is an evaluation of the obtained results. The contribution appropriately and well complements a wide range of sheet metal cutting problems.
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    Barkhausenov šum po dynamickom guľôčkovaní duplexnej ocele AlSi 318
    (University of Žilina, 2024) Mičietová, Anna; Uríček, Juraj; Čilliková, Mária; Neslušan, Miroslav
    This paper deals with surface integrity and the corresponding Barkhausen noise after shot peening of duplex steel AlSi 318 under variable shot-peening conditions such as number of passes and applied air pressure. Surface state is investigated from the point of view of surface roughness and surface plastic deformation. Barkhausen noise is decreasing along with increasing surface coverage as well as increasing air pressure. The duplex matrix is considered being stable with respect of volume fraction between austenite and ferrite and the whole Barkhausen noise signal originates from ferromagnetic ferrite. Progressively developed plastic deformation increases dislocation density in the surface as a result of surface bombardment by shots which in turn shift Barkhausen envelopes into higher magnetic fields.
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    Rovnanie plechu bodovým ohrevom
    (Žilinská univerzita v Žiline, 2023) Moravec, Ján
    The contribution is devoted to the issue of material alignment. The theoretical description and essence of straightening by local heating is presented. Mechanical methods of leveling the material are also covered. In the experimental part, an experiment is described, which is based precisely on the theoretical analysis of the process of straightening by local heating.
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    Konštrukcia strižného nástroja pre pristrihovanie činných plôch
    (Žilinská univerzita v Žiline, 2023) Melo, Borislav; Dostál, Robert
    Cutting technology is one of the basic and supporting methods, preferably of dividing materials. The preparation of material for further processing cannot be imagined without the use of cutting technology. The text of the contribution describes the geometric solution of the cutter and also the construction of the used tool for the area of trimming sheet metal and creating qualitatively more suitable cutting surfaces. The goal of the contribution was the design of a tool for the application of sheet metal trimming.
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    Tvárnenie v hydraulickom prostredí explóziou
    (University of Žilina, 2023) Moravec, Ján
    The article describes and analyses the issue of explosive sheet metal forming in a hydro environment. In the introductory part, the necessary theoretical and technological knowledge is presented, which is necessary as a theoretical introduction to the issue. The explosion process in a liquid environment is described. The reflection from the surface and bottom of the tank used in the experiment is important. The paper only offers a view of the theoretical side of the process, because the legislative framework does not yet allow direct experimental work to be carried out, which must be done by a certified specialist in the handling of explosives.