20.500.12556/RUL-186689 Preoblikovanje cevne krivine z visokim notranjim tlakom Forming of a tube bend under high internal pressure V zaključni nalogi je obravnavan vpliv časovnega poteka notranjega tlaka na preoblikovanje cevi z visokim notranjim tlakom. V teoretičnem delu so predstavljene osnove postopka preoblikovanja cevi z notranjim tlakom, ključni procesni parametri ter vpliv poti obremenjevanja na potek preoblikovanja. V eksperimentalnem delu so bili primerjani trije različni časovni profili notranjega tlaka: linearni, progresivni in regresivni profil. Pri vseh preizkusih so bili uporabljeni enaki začetni pogoji in primerljivi procesni parametri. Izdelani preoblikovanci so bili ovrednoteni z analizo geometrijskega odstopanja od referenčnega CAD-modela ter z meritvami porazdelitve debeline stene. Najugodnejše rezultate je dosegel progresivni tlačni profil, vendar so bile razlike med vsemi tremi preizkušenimi profili majhne. Rezultati kažejo, da lahko časovni potek notranjega tlaka vpliva na geometrijsko natančnost preoblikovanca in porazdelitev debeline njegove stene. The thesis investigates the influence of the time-dependent internal pressure profile on tube hydroforming. The theoretical part presents the fundamentals of tube hydroforming, the key process parameters, and the influence of the loading path on the forming process. In the experimental part, three different internal pressure profiles were compared: linear, progressive, and regressive. The same initial conditions and comparable process parameters were used in all experiments. The produced components were evaluated by analysing their geometric deviation from the reference CAD model and by measuring the wall thickness distribution. The progressive pressure profile produced the most favourable results, although the differences between all three tested profiles were small. The results indicate that the time-dependent internal pressure profile can influence the geometric accuracy of the formed component and the distribution of its wall thickness. preoblikovanje z visokim notranjim tlakom notranji tlak časovni potek tlaka cevni preoblikovanci debelina stene high internal pressure forming internal pressure pressure-time profile tube-formed components wall thickness true false false [G. Janžovnik] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2026-09-04 08:31:22 2026-09-04 08:31:26 2026-09-07 13:14:39 0000-00-00 00:00:00 2026 0 Ljubljana 0 XIV, 41 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.774:621.791(043.2) 289186 290232835 48819.pdf 48819.pdf 1 1AA8BD15D2229A3E831DF1FB8EE65FDB 3f5cc552773f0eef1c53f6f15099211f319f87c27874cb5f1a73eca94e07ea1b 41197bb1-a82a-11f1-8bc5-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=246011 Fakulteta za strojništvo 0 0 0