20.500.12556/RUL-127959 Analiza izvornih vzrokov puščanja na membranskih pogonih regulatorskih ventilov Root cause analysis of leakage on membrane valve drives V diplomski nalogi je na sistemski način prikazano reševanje problema puščanja membranskih pogonov regulatorskih ventilov. Po korakih procesa 8D in z uporabo orodij za iskanje izvornega vzroka problema je izvedena analiza izdelka, orodij, materiala in procesa. Ugotovljena so odstopanja meritev materiala od zahtevanih vrednosti, obraba in ovalna oblika orodja za preoblikovanje pa tudi napačno zasnovan utor za o-tesnilo. Z novo zasnovo utora, novim orodjem ter materialom, je izmet zmanjšan na željeno vrednost, ki je manj kot 1 %. Vse izboljšave smo potrdili s proizvodnimi in tlačnim testom. The diploma thesis present the solution for the problem of leaking diaphragm actuators of control valves on systematic way. Over the steps of 8D process and using different tools for problem solving to find root cause of the problem, an analysis of the product, tools, material and process is performed. Deviation of material dimensions from the required values, wear and oval shape of forming tool and incorrectly designed o-ring seal groove, has been identified. With the new groove design, new tools and material the scrap is reduced to the desired value of less than 1 %. All improvments was have been validated by production and burst tests. puščanje stiskanje o-tesnilo proces 8D tlačni test leaking compression o-ring proces 8D burst test true false false [J. Laščak] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2021-06-30 08:30:45 2021-06-30 08:30:47 2023-11-06 11:32:49 0000-00-00 00:00:00 2021 0 Ljubljana 0 XXII, 51 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 62-762.84:621.643.8(043.2) 228939 70838787 7304.pdf 7304.pdf 1 9DDA6445869E87FC96753F0264F900D8 2ddc2f9f3817853165f4320cd7698c68bc7d4bad1947afe9a6dc78caa751f363 956b6da9-d96c-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=144575 Fakulteta za strojništvo 0 0 0