Прегледај по Аутор "Ilić, Jovica"
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- СтавкаADDITIVE MANUFACTURING OF FUNCTIONAL PARTS BASED ON MATERIAL EXTRUSION TECHNOLOGY(Akademija nauka i umjetnosti Republike Srpske, 2016) Šljivić, Milan; Fragassa, Cristiano; Pavlović, Ana; Kraišnik, Milija; Ilić, Jovica; Stanojević, MićoThis paper presents the advantages and the process of making of complex functional parts using additive manufacturing technology. Design and manufacturing of components were performed at the Laboratory for Technology of Plasticity and Processing Systems at the Faculty of Mechanical Engineering in Banja Luka. The parts were designed using SolidWorks and Catia software packages. Then, CatalystEX and Simplify3D software packages were used to process the CAD model and to prepare it for 3D printing, which included defining of the process parameters, generating layers and support. Functional parts were produced on 3D printers based on the principle of material extrusion. The results of this study show that additive manufacturing technology, specifically technology based on material extrusion, enables very fast production of complex functional parts, with high accuracy and much lower costs and development time compared to conventional technologies.
- СтавкаComparing the accuracy of 3D slicer software in printed enduse parts(2019) Šljivić, Milan; Pavlović, Ana; Kraišnik, Milija; Ilić, JovicaThis study aims to compare the accuracy offered by 3D Slicer Software in printing end-use parts inside a Fused Deposition Modeling process of Additive Manufacturing. The purpose, in particular, is to investigate the surface quality and the dimensional stability of the manufactured parts comparing the effect of selecting a different 3D Slicer tool among Simplify3D, Cura and Slic3r 3D. With this scope, parts were produced using these process tools while results were analysed in terms of accuracy, production time and consumption of material. Results, graphically and visually presented, show significant differences in the dimensional and surface accuracy with an optimum outcome offered by the Simplify3D as best 3D slicer tool. The Simplify3D slicer has essential advantages in printed end-use parts because creates the 3D models with significantly better accuracy and quality support.
- СтавкаCOMPARING 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, BiljanaIn 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.
- СтавкаCOMPRESSIVE PROPERTIES OF COMMONLY USED POLYMERS IN ADDITIVE MANUFACTURING PROCESSES(University Politehnica Timisoara, Faculty of Engineering Hunedoara, 2017) Kraišnik, Milija; Šljivić, Milan; Ilić, Jovica; Anić, JelicaProduction methods based on additive manufacturing technologies represent a powerful approach to the rapid and efficient production of complex prototypes and functional parts from different materials. This paper presents the procedure of development and production of a holder using a fusing deposition modeling process. Since compression is the dominant load on the holder in exploitation, mechanical testing was carried out and the results obtained can contribute to adequate material selection.
- СтавкаDEVELOPMENT OF SMALL BATCHES OF FUNCTIONAL PARTS USING INTEGRATION OF 3D PRINTING AND VACUUM CASTING TECHNOLOGY(University of Banja Luka, Faculty of Mechanical Engineering, 2017) Šljivić, Milan; Kraišnik, Milija; Ilić, Jovica; Anić, JelicaIn conditions of dynamic market environment there is an increasing requirement for rapid development and production of complex and functional parts from different materials. In this paper, we present the process of development and production of small batches of functional parts in the integrated system of additive and vacuum casting technology. All advantages of this integrated approach were used during the research. Data obtained from the manufacturer were used for the proper selection of materials and they relate to the value of mechanical characteristics.
- СтавкаFABRICATION OF SMALL BATCHES OF FUNCTIONAL AND AUTHENTIC PARTS FOR OLD-TIMERS USING INTEGRATION OF MATERIAL EXTRUSION AND VACUUM CASTING TECHNOLOGIES(Department of Mechanical Engineering, Aristotle University of Thessaloniki, Greece, 2017) Kraišnik, Milija; Šljivić, Milan; Ilić, Jovica; Anić, JelicaThis paper focuses on production of small series of functional parts for old timers, for which it is very difficult and in some cases impossible to find spare parts. Specifically, the paper presents the possibilities of designing and making authentic parts with special requirements of the owner or the collector of old timers. As a result of this study, a small series of authentic parts and replicas based on the existing functional parts of the oldtimers was designed and fabricated. The results of experimental studies have highlighted the advantages of production that is based on the integration of technology of material extrusion and vacuum casting, especially for small series of complex and specific products.
- СтавкаIndustry 4.0 and New Paradigms in the Field of Metal Forming(University North, 2021) Milutinović, Mladomir; Milošević, Mijodrag; Ilić, Jovica; Movrin, Dejan; Kraišnik, Milija; Ranđelović, Saša; Lukić, DejanOver the last few year, the metalworking sector has been undergoing rapid and radical transformations driven by global competition and the revision of the production focus that is being moved from mass customization to mass individualization. A results of this is introduction of new manufacturing strategies such as Industry 4.0, a concept that combines cyber-physical systems and promote communication and connectivity. Therefore, this concept changes not only the face of the manufacturing systems but also causes transformation of existing business models and the society as a whole. This paper deals with the recent trends and paradigms in the field of metal forming, resulting from the concept of Industry 4.0 and the modern market challenges. The maim attention is paid on the flexibility of manufacturing systems and recent developments in design of smart forming tools.
- СтавкаPolymers in Additive Manufacturing: the Case of a Water Pump Impeller(Faculty of Mechanical Engineering, Belgrade University, 2017) Pavlović, Ana; Šljivić, Milan; Kraišnik, Milija; Ilić, Jovica; Anić, JelicaThis research aimed at evaluating which of the polymers commonly used for rapid prototyping in the process of additive manufacturing can also meet the functional requirements in the preparation of final parts. In particular, the investigation was focused on a water pump impeller as a practical case study. A comparison between mechanical properties was proposed for this scope. ABSplus, ABS and PLA polymers were considered. Materials were tested in tensile and bending conditions. Results showed that ABSplus and ABS polymers satisfy all the mechanical requirements, while PLA fails. Then, the impellers were built-in and tested. All functional requirements, together with the necessary stability were verified. In this way, it was proved that, by selecting a suitable polymer, additive manufacturing can be successfully used to produce complex final elements, thus leading to extremely fast production, high accuracy and precision and even lower costs compared to other conventional technologies.
- СтавкаSOME ASPECTS OF DEVELOPMENT OF DUCTILE CRACK IN THE PROCESS OF COLD BULK FORMING(Faculty of Engineering Hunedoara, University POLITEHNICA Timisoara, 2017) Kraišnik, Milija; Šljivić, Milan; Anić, Jelica; Ilić, Jovica; Mijatović, BiljanaThe main limiting factor in increasing the productivity of the process of cold bulk metal forming is the appearance of plastic fracture. However, proper design of a technological process can greatly increase formability of the material. For those activities it is necessary to fully understand all the factors that affect constituent stages of development and the appearance of macroscopic damage on metal components. Therefore, based on the available literature resources and our own research, the impact of the most dominant factors on accumulation of critical damage of microstructure in cold bulk metal forming processes with special reference to the impact of stress state was analyzed in this paper.
- СтавкаSOME ASPECTS OF DEVELOPMENT OF PLASTIC FRACTURE IN THE PROCESS OF COLD BULK FORMING(Technical faculty “Mihajlo Pupin” Zrenjanin, University of Novi Sad, 2016) Kraišnik, Milija; Šljivić, Milan; Anić, Jelica; Ilić, JovicaThe main limiting factor in increasing the productivity of the process of cold bulk metal forming is the appearance of plastic fracture. However, proper design of a technological process can greatly increase formability of the material. For those activities it is necessary to fully understand all the factors that affect constituent stages of development and the appearance of macroscopic damage on metal components. Therefore, based on the available literature resources and our own research, the impact of the most dominant factors on accumulation of critical damage of microstructure in cold bulk metal forming processes with special reference to the impact of stress state was analyzed in this paper.