20.500.12556/RUL-181145 Preoblikovanje naprave KeyBot za injekcijsko brizganje na podlagi 3D-natisnjenega prototipa Redesign of the KeyBot Device for Injection Moulding Based on a 3D-Printed Prototype Diplomska naloga obravnava konstrukcijsko predelavo naprave KeyBot iz funkcionalnega 3D-natisnjenega prototipa v izvedbo, primerno za serijsko proizvodnjo z injekcijskim brizganjem. Izhodiščni model, prvotno optimiziran za aditivno proizvodnjo, je bil analiziran z vidika tehnoloških in konstrukcijskih zahtev brizganja plastike, kot so enakomerna debelina sten, ustrezni koti izvleka, odprava podrezov ter prilagoditev spojev. Večina komponent je bila na novo zasnovana za injekcijsko brizganje, medtem ko so deli s variabilno geometrijo ostali predvideni za 3D-tiskanje. Konstrukcija je bila dodatno optimizirana z zamenjavo vijačnih zvez z zaskočnimi spoji, katerih mehanska ustreznost je bila preverjena z analitičnimi preračuni. Kritično obremenjena mesta so bila ovrednotena z numeričnimi analizami po metodi končnih elementov. Rezultat naloge je konstrukcijsko in tehnološko optimiziran model, ki predstavlja ustrezno tehnično podlago za izdelavo orodij ter nadaljnjo serijsko proizvodnjo naprave. The diploma thesis addresses the structural redesign of the KeyBot device from a functional 3D-printed prototype into a version suitable for mass production via injection molding. The initial model, originally optimized for additive manufacturing, was analyzed regarding the technological and design requirements of plastic injection molding, such as uniform wall thickness, appropriate draft angles, elimination of undercuts, and joint adaptation. Most components were redesigned for injection molding, while parts with variable geometry remained designated for 3D printing. The design was further optimized by replacing screw connections with snap-fit joints, the mechanical adequacy of which was verified through analytical calculations. Critically loaded areas were evaluated using numerical finite element analysis (FEA). The result of the thesis is a structurally and technologically optimized model, which represents a suitable technical foundation for mold making and subsequent mass production of the device. injekcijsko brizganje zaskočni spoji 3D-tiskanje CAD MKE analize injection molding snap-fit joints 3D printing CAD FEA analysis true false false [N. Sajovic] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2026-03-26 08:30:58 2026-03-26 08:31:01 2026-03-30 04:12:44 0000-00-00 00:00:00 2026 0 Ljubljana 0 XXII, 60, [1] str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 004.925.84:678.027.74(043.2) 283364 273206531 46679.pdf 46679.pdf 1 7E5C06E3A3402000BE9EB04E682BB351 58d9a6005bff31700c925d69c69fcead3d7b84c631dd390a34e7d9382fe067ea 9b99df21-28e5-11f1-b0ab-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=231342 Fakulteta za strojništvo 0 0 0