DREPO UNIZA
Digitálny repozitár Žilinskej univerzity
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Technológ - celé číslo 4/2024
(University of Žilina, 2024)
Zmena mechanických vlastností vybraných materiálov aplikáciou povrchového kalenia
(University of Žilina, 2024) Fabian, Peter; Jaššo, Martin; Pastirčák, Richard
Comparing the mechanical characteristics of steel used in the weapons sector to make barrels for short, small arms is the study's goal. The heat treatment of representative samples resulted in their hardening, surface hardening to a specific layer thickness, and tempering. It has not yet been thoroughly examined how the thickness of the hardened layer affects the modification of the mechanical characteristics of the chosen materials. Surface hardening is widely regarded as one of the methods for producing a resistant core and a hard surface on a component. Nonetheless, the overall material's mechanical characteristics alter in tandem with the layer's thickness. The outcomes of this study will also be useful for the induction heat treatment of other similar material components.
Stanovenie strižnej sily pomocou experimentálneho nástroja
(University of Žilina, 2024) Melo, Borislav
The contribution deals with the possibility of applying a special shearing tool, which could be used to determine the shearing forces of thinner sheets. The device is suitable for a wide range of presses. Both theoretical and practical knowledge from this issue is presented. The construction of the shearing tool is shown. In the experimental part, the correct solution of the tool was confirmed. The results of process simulations for cutting three types of materials are also published.
Vplyv teploty formy na vybrané vlastnosti AlSi5Cu2Mg
(University of Žilina, 2024) Kantoríková, Elena
Currently, high demands are placed on the costs associated with the production of products, therefore it is advisable to know the individual characteristics of materials that are used in industry. The article deals with the influence of mold temperature on the mechanical properties of aluminium alloy. By knowing the characteristics of individual materials, it is possible to effectively design and manufacture equipment that will be safe and suitable for the given application. In many cases, aluminium alloys are offered as a solution, which are considered innovative construction materials, mainly because of the perfect combination of their properties.
Súčasný stav prevodoviek s nastaviteľným prevodovým pomerom pri elektrickom pohone
(University of Žilina, 2024) Blatnický, Miroslav; Samaš, Vladimír; Dižo, Ján
The scope of this article covers potential technologies for transmission mechanisms with variable gear ratios that can be applied to electric traction. A transmission with an adjustable gear ratio allows for the adaptation of the gear ratio according to usage conditions. By adjusting the gear ratio and consequently the traction forces, we can enhance driving parameters, e.g. improved both efficiency and range. The paper theoretically examines various transmissions with variable gear ratios and compares their parameters in the context of electric drives.