Žilinská univerzita v Žiline

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    Interpretácia nových pravidiel pre používanie požiadaviek pre charakter povrchu - profil
    (University of Žilina, 2024) Bronček, Jozef; Konstantová, Viera; Drbúl, Mário
    The international standard STN EN ISO 21920-1 specifies the rules and methodology for marking the character of the surface profile by profile methods in the technical documentation of the product using graphic marks. The aim of the article is to familiarize the public with the content of the standard included in the Geometrical Product Specification (GPS) system. The changes in the area of default settings concern the introduction of new rules for acceptance of tolerance. The rules determine how the tolerance limits are applied to the measured values of the parameters. The introduced changes benefit the majority of users for prescribing, manufacturing and checking product requirements.
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    Vplyv technologických parametrov pri prievlačnom ťahaní rúr na ich výsledné vlastnosti a presnosť
    (University of Žilina, 2023) Bílik, Jozef; Sobota, Róbert; Kritikos, Michaela
    The article is focused on the implementation of experimental tests in order to monitor the impact of technological parameters during the drawing of tubes on their resulting properties and accuracy. In experimental tests, samples of seamless tubes with dimensions of Ø14, Ø16 and Ø18 were used, which were pulled by pressing to the final outer diameter of Ø12. Measurements of internal and external diameter as well as tensile tests to determine mechanical properties were carried out before and after drawing on the tubes. Experimental tests were carried out in order to optimize the drawing process to reduce the number of operations and reduce production costs.