20.500.12556/RUL-139865 Optimizacija prekrivanja navarov za dosego ravnih površin Optimisation of weld step-over for evenly welded surface Prekomerna obraba funkcionalnih površin izdelkov in orodij pomeni velik strošek, saj je potrebno obrabljeno orodje zamenjati z novim oz. ga popraviti z reparaturnim varjenjem. Izziv pri tem predstavlja določanje varilnih parametrov in predvsem geometrije navarjanja. Cilj diplomske naloge je bil določiti optimalno stopnjo prekritja navarov za dosego ravne površine. Eksperimentalno delo je vključevalo oblikovno obločno navarjanje z žico. Uporabili smo triosni CNC manipulator ter napravo za varjenje MIG/MAG, z dodajno žico VAC 60. Eksperimentalno smo navarjali dvojice zvarov z naraščajočim zamikom pri različnih procesnih parametrih in površino vzorcev izmerili s 3D merilnikom oblike teles. Te oblike smo analizirali z algoritmom, razvitim v okviru naloge. Za določanje optimalne stopnje prekritja navarov smo uporabili kriterij minimalne razlike med maksimumom in sedlom med navari ter razmerje višin zvarov v dvojici. Ugotovili smo, da na obliko zvara najbolj vpliva linearni vnos energije. Veliko vlogo pri navarjanju več prekrivnih zvarov ima površinska napetost taline. Excessive wear of functional surfaces of products and tools is a huge cost because the worn tools must be replaced with new ones or repaired with repair welding. The challenge here is the determination of welding parameters but above all the geometry of a weld bead. The aim of the thesis was to determine the optimal weld step-over to achieve a flat surface. The experimental work consisted of wire and arc additive manufacturing. We used a 3-axis CNC manipulator and a MIG/MAG welding machine with a VAC 60 filler wire. Experimentally, we used a pair of welds with a growing pattern at different process parameters and measured the surface of the samples with a 3D body shape gauge. These forms were analyzed using an algorithm developed as part of the thesis. The criterion of minimum difference between the maximum and the saddle between the welds and the ratio of the heights of the welds in the pair was used to determine the optimum degree of welds overlap. We found that the linear energy input influences the most on the shape of the weld. The surface tension of the melt plays a vital role in weld surfacing. varjenje MIG/MAG oblikovno obločno navarjanje z žico 3D merjenje oblike teles algoritem za analizo navarov optimizacija prekrivanja navarov dvojice zvarov. MIG/MAG welding wire and arc additive manufacturing 3D laser profilomer algorithm for analyzing weld beads optimisation of weld step-over two weld beads. true false false [T. Kancler] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2022-09-08 08:30:51 2022-09-08 08:30:55 2023-01-10 14:27:38 0000-00-00 00:00:00 2022 0 Ljubljana 0 XXIV, 64 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.791.75:531.717.2(043.2) 244508 136082435 17624.pdf 17624.pdf 1 7F5B0CE1E51382C5B3ABCF63105B5688 707acd7c70dd5e4e884730a34c39404893db35b6019e2b683898b1da4bcb68b6 bd90c5cf-2f3f-11ed-92af-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=160501 Fakulteta za strojništvo 0 0 0