Faculty of Mechanical Engineering, Lj. (FSLJ)
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Izboljšava kakovosti procesa visokotlačnega litja aluminijastih izdelkov : diplomsko delo Visokošolskega strokovnega študijskega programa I. stopnje Strojništvo - Projektno aplikativni programŠušteršič, Gašper, inženir strojništvaPri visokotlačnem litju se v serijski proizvodnji pojavljajo različne napake na ulitkih. Za njihovo zaznavanje je potrebna sistematična kontrola ulitkov, ki med drugim vključuje tudi časovno in ... izvedbeno zahtevno rentgensko kontrolo. Cilj serijske proizvodnje je obvladovati proizvodni proces in procesne parametre do te mere, da defektnih kosov ne bo, pri čemer tudi 100 % rentgenska kontrola ne bo več potrebna. V diplomskem delu je prikazana vpeljava ulitka v serijsko proizvodnjo. Največje odstopanje pri kakovosti je predstavljala poroznost v ulitku, ki jo zaznamo z rentgensko kontrolo. S pomočjo 6sigma metode smo skozi preizkuse litij izboljšali tlačno orodje in posledično izboljšali kakovost ulitka. S Taguchi metodo smo raziskali vpliv tlaka III. faze na poroznost v ulitku. Na podlagi raziskav smo definirali ustrezne procesne parametre, s katerimi smo izmet na 100 % rentgenski kontroli zmanjšali na manj kot 5 %. Ugotovili smo, da delovanje vakuuma in obrabljen livni bat najbolj vplivata na nastanek poroznosti v ulitku. Na podlagi teh ugotovitev smo prešli iz 100 % rentgenske kontrole ulitkov na vzorčno kontrolo. S prehodom na vzorčno kontrolo smo proizvodne stroške enega ulitka znižali za 9 %. S spremembo mazanja tlačnega orodja smo izboljšali produktivnost procesa, saj smo čas enega cikla zmanjšali za 23 %. Po predstavljenih izboljšavah je proces obvladovan, pri čemer je skupen izmet po vseh delovnih operacijah nižji od 7 %.Type of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [G. Šušteršič], 2023Language - slovenianCOBISS.SI-ID - 165441795
Author
Šušteršič, Gašper, inženir strojništva
Other authors
Bračun, Drago
Topics
diplomske naloge |
visokotlačno litje |
napake litja |
preizkusi litja |
izboljšava procesa |
6sigma |
Taguchi metoda |
high-pressure die casting |
casting defects |
casting tests |
process improvement |
6sigma |
Taguchi method
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VS 0000001180 IN: 60001180 VS 1180 IN: 60001180 |
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Šušteršič, Gašper, inženir strojništva | |
Bračun, Drago | 18327 |
Source: Personal bibliographies
and: SICRIS
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