20.500.12556/RUL-129803 Vpliv kriogenih temperatur na učinkovitost obdelave z abrazivnim vodnim curkom Influence of cryogenic temperatures on efficiency of abrasive water jet machining Dandanes se v proizvodnji veliko vlaga v razvoj in optimizacijo obdelovalnih postopkov za zagotavljanje večje produktivnosti, nižjih stroškov obdelave, boljše natančnosti in kvalitete izdelkov. Raziskovalci so že razvili klasične obdelovalne postopke s kriogenim ohlajanjem, podobno lahko optimiziramo proces obdelave z abrazivnim vodnim curkom (AVC). Opazovali smo vpliv podhlajevanja obdelovancev iz nerjavnega jekla X5CrNi18-10 ter aluminijeve zlitine AlMg4,5Mn0,7 na njuno obdelovalnost. Vzorce smo ohlajali v tekočem dušiku na temperaturo -198 °C in nanje izdelali gravuro z AVC, dobljene rezultate pa smo primerjali z eksperimenti z vzorci pri sobni temperaturi. Spremljali smo spreminjanje temperature med ohlajanjem in graviranjem. Spreminjanje učinkovitosti procesa smo vrednotili glede na količino erodiranega materiala, ki smo jo izračunali kot razliko v masi vzorca pred in po obdelavi, ter glede na doseženo globino gravure. Recently, significant investment has been made in the development and optimization of the machining processes to ensure higher productivity, lower processing costs, high precision, and quality of products. Researchers have already developed classic processes that employ cryogenic cooling, which can similarly optimize the process of machining with abrasive water jet (AWJ). We observed how supercooling impacted the stainless steel X5CrNi18-10 and aluminium alloy AlMg4.5Mn0.7 workpieces. The samples were cooled by liquid nitrogen to -198 °C and engraved with AWJ. The results were compared with the experiments with samples conducted at room temperature. We monitored the change in temperature during cooling and engraving. The change in the efficiency of the process was evaluated according to both the quantity of the eroded material, which was calculated as the difference in the mass of the sample before and after the processing, and the depth of the engraving. abrazivni vodni curek rezanje graviranje kriogena obdelava tekoči dušik učinkovitost procesa abrasive water jet cutting engraving cryogenic machinig liquid nitrogen proccess efficiency true false false [Ž. Tomažič] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2021-09-08 08:30:47 2021-09-08 08:30:49 2023-12-01 09:08:44 0000-00-00 00:00:00 2021 0 Ljubljana 0 XXII, 44 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 621.9.04:536.483(043.2) 233006 77672963 10560.pdf 10560.pdf 1 856873D0D20E15EB0196B505FADF1752 12e047753debb6a42e197254010029b81fddaf25c6e9f36e8bed8e7b8f94dbc9 0fceca72-106e-11ec-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=146834 Fakulteta za strojništvo 0 0 0