20.500.12556/RUL-130363 Vrednotenje hlajenja 3D tiskanih tankih reber z bakreno sredico Evaluation of cooling of 3D printed thin ribs with a copper core V tlačnem litju aluminija se pojavlja problem hlajenja gravur kompleksnih izdelkov, saj je število injektorskih hladilnih naprav (»jet cooler« – sistem kombiniranega hlajenja voda-zrak) v obravnavanem orodju omejeno. Trenutno se v praksi, v primeru prekoračitve števila dovoljenih JC, uporablja vzporedna vezava, kar zmanjša vodni tok in povzroči padec hladilne učinkovitosti. Zato smo razvili alternativno metodo hlajenja reber, in sicer z vstavljanjem bakrene sredice, ki bo pomagala pri hitrejšem odvodu toplote. Konstruirali smo tri variante reber ter na njih opravili analitični preračun za potrditev predvidevanj. Nato smo na treh modelih opravili še numerične analize z metodo končnih elementov za vrednotenje učinkovitosti odvajanja toplote v rebrih. Rebro z bakreno sredico je manj učinkovito od rebra s hladilnimi kanali in rebro z debelejšo sredico je učinkovitejše od rebra s tanjšo sredico. In the process of high pressure die casting a problem occurs when cooling the dies of a highly complicated product, as the number of “jet cooling” (combined water-air cooling system) cores is limited to 16 per tool. That is why we designed an alternative to cooling thin ribs with inserting copper cores in the centre, which will help in faster heat dissipation. We constructed three different variations of ribs and completed an analytical calculation to confirm our predictions. Then we performed numerical analysis with finite element method on all three models, to evaluate the effectiveness of heat transfer within the ribs. The ribs with copper cores are less effective than the one with cooling channels. The thicker copper core is more effective than the thinner core. tlačno litje temperiranje orodij prenos toplote hlajenje Abaqus metoda končnih elementov 3D tisk kovin elektroerozija die casting tool tempering heat transfer cooling Abaqus Finite element method metal 3D printing electric discharge manufacturing true false false [M. Prinčič] Slovenski jezik Angleški jezik Zaključna naloga 2021-09-14 08:31:20 2021-09-14 08:31:21 2023-11-03 09:02:50 0000-00-00 00:00:00 2021 0 Ljubljana 0 XIV, 39 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 2022-09-10 621.746:621.56:519.61(043.2) 233772 82009603 11268.pdf 11268.pdf 1 EB4CB4B236DE46AD87537C20075FFE0D b147ab7f2b79d320b1c855f78ab11469251943a2ddbc5652ff77700dd0b04c2f 1f2eee68-1525-11ec-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=147458 Fakulteta za strojništvo 0 0 0