20.500.12556/DKUM-68391 Metalografska preiskava nosilca žiga Metallographic examination of punch holder V podjetju GKN Driveline Slovenija prihaja do težav pri izdelavi kletk ležajev za homokinetični zglob, in sicer pri prebijanju okenc na kletki, v katero so vstavljene ležajne kroglice. V podjetju želijo zagotoviti daljšo življenjsko dobo nosilca orodja za prebijanje in so se odločili v prvi fazi preiskati ali je uporabljen predpisani material in/ali je toplotno obdelan kot predvideva tehniška dokumentacija. Naloga zajema pregled prelomnih površin, kemijsko analizo, preiskavo mikrostrukture in merjenje trdote. Vse preiskave so privedle do ugotovitve, da sta material in toplotna obdelava materiala v skladu s tehniško dokumentacijo. Rešitev je potrebno zato poiskati bodisi v drugem materialu, drugačni obdelavi ali v spremembi konstrukcije nosilca. In GKN Driveline Slovenia there are problems in the production off the bearing-ball separators for the ball bearing in the homokinetic joint. The main problem is connected to punching of holes into which the bearing-balls are inserted. The service time of the punch holder should be extend. In the first phase, it should be examined whether the material and the heat treatment correspond to the technical specification. The task includes the chemical analysis, examination of fracture surfaces and microstructure and hardness measurement. All investigations have led to the conclusion that the material and its heat treatment comply with the technical documentation. Therefore, the choice of another material, a different heat treatment or redesigning of the punch holder should be considered. GKN Nosilec žiga Metalografska preiskava Meritve trdote GKN Punch holder Metallographic examination hardness measurement true true false [T. Kenda] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2017-09-20 08:31:04 2017-11-10 11:58:24 2022-08-01 15:30:17 2019-07-11 16:51:43 2017 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 620.18(043.2) 21286934 URN:SI:UM:DK:Z9JFX164 UN_Kenda_Tomi_2017.pdf UN_Kenda_Tomi_2017.pdf 1 80F7E5278FE319B43271968B6747F438 3cce218cac45871dd651811c8cff8383af451f360a6baf74b8f70bc053a59230 7ae33f4f-7c0f-11eb-bb7a-00155d0001ca 20.500.12556/dkum/3fa83bb7-0b64-4744-a858-b1eeca57fde5 https://dk.um.si/Dokument.php?lang=slv&id=120123 Fakulteta za strojništvo 0 0 0