Прегледај по Аутор "Mačkić, Tihomir"

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    ANALYSIS OF GEAR RATIOS OF TWO DIFFERENT TYPES OF CYCLOID DRIVE TRAIN
    (Mašinski fakultet, Univerzitet Istočno Sarajevo, 2022) Tica, Milan; Mačkić, Tihomir; Marjanović, Nenad; Troha, Sanjin; Milutinović, Miroslav; Golubović, Dušan; Milutinović, Miroslav; Prodanović, Saša
    The cyclo drive train is a special variant of the planetary drive train, where the planets are gears with a cycloid profile, while rollers are placed on the central gears (wheels). An analysis of the gear ratios of two types of cycloid drive train was performed. The first type is a classic cycloid drive train, while the second is a special variant with stepped planets. The cycloid drive with stepped planets can achieve very large gear ratios, while using central gears with a relatively small number of rollers.
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    Analysis of Power Losses in Constrained Cycloid Drive
    (Sveučilište u Slavonskom Brodu, Stojarski fakultet, 2023) Mačkić, Tihomir; Marjanović, Nenad; Tica, Milan; Troha, Sanjin; Milutinović, Miroslav; Rašović, Nebojša; Raos, Pero
    The aim of this paper is to present a theoretical model for efficiency evaluation of a simple cycloid drive train with one degree of freedom (DOF) or constrained cycloid drive. In order to evaluate the efficiency, it is necessary to find the losses generated in the simple cycloid drive, where only losses depending on the load were considered. Expressions for determining speed ratios, efficiency, velocities and forces acting inside the cycloid drive are presented. These expressions are implemented in the theoretical model, where the places where the losses occur are defined. A computer program was created to facilitate analysis and obtain loss values based on different input data. Only load-dependent losses were considered in the theoretical model and computer program. In order to verify the theoretical model, experimental measurements were performed. A physical model of the simple cycloid drive train was created and analyzed on the test bench. The results for "S1" operating mode, i.e. when shaft 2 is stopped, show a mean value of the efficiency of 63.49%, for experimental measurements, while the mean value for theoretical analysis is 65.25%. For the operating mode "S2", i.e. with shaft 1 stopped, the mean value of the experimental measurements of the efficiency is 60.9%, while the theoretical mean value is 62.82%.
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    COMPARING THE ACCURACY OF MASTER MODEL AND THEIR REPLICAS PRODUCED BY RAPID TOOLING USING VACUUM CASTING
    (Mašinski fakultet, Univerzitet u Banjoj Luci, 2019) Kraišnik, Milija; Ilić, Jovica; Jotić, Goran; Mačkić, Tihomir; Anić, Jelica; Gvero, Petar; Prochaska, Biljana
    In this paper we compared the accuracy of an original master model which was used to make the silicone mold and mold cavity and its replicas obtained by the vacuum casting technology. This technology allows us to create small batches of parts based on the master model in a relatively short time. The aim of the paper is to compare the accuracy of replicas produced with the OEM part using a reversible engineering technique, that is, CAD to part.