Scientific literature review on cryogenic milling and drilling using liquid CO2

V zaključni nalogi so pregledane informacije o eksperimentih ter ugotovitve znanstvenih literatur s področja kriogenega frezanja in vrtanja z uporabo kapljevitega ogljikovega dioksida (angl. Liquid Carbon Dioxide – LCO2). Narejen je pregleden povzetek znanstvene literature v obliki tabele, kjer so vse ključne informacije zbrane in razvrščene kronološko. S pomočjo grafikona smo primerjali število znanstvenih raziskav na temo frezanja in vrtanja. Poleg kapljevitega CO2, se v delu omenja tudi superkritični CO2 in CO2 v obliki suhega ledu. Kriogeno odrezovanje se primerja s suho obdelavo, odrezovanjem z oblivanjem hladilno mazalne tekočine, tekočinam pod visokim tlakom in odrezovanjem z minimalni mazanjem. Ugotovljeno je bilo, da kriogeno frezanje z asistenco LCO2 predstavlja obetavno alternativo oljnim emulzijam na področju odrezavanje težko obdelovalnih in toplotno obstojnih materialov. Za uporabo kriogenega vrtanja z asistenco LCO2 so potrebne nadaljnje raziskave, kajti na tem področju je le-teh zelo malo. Nasprotno, število raziskav na področju kriogenega frezanje pa se povečuje. Najbolj zastopan material obdelovanca v literaturi s področja kriogenega frezanja in vrtanja ob asistenci CO2 je titanova zlitina Ti-6Al-4V.In this thesis, experimental information and findings from scientific literature on the cryogenic milling and drilling with the assistance of liquid CO2 (LCO2) is presented. In addition, a summary of the scientific literature is made in the form of a tables, where all the key information are brought together and sorted by year of publication. Moreover, in charts, we compared the number of scientific studies that were made on milling and drilling. Beside liquid CO2, supercritical CO2 and CO2 in the form of dry ice are also mentioned. Cryogenic machining is compared to a dry machining, flood lubrication machining, high-pressure assisted machining and machining with minimum quantity lubrication. It has been found, that cryogenic milling with LCO2 is a promising alternative to the oil-based emulsions in machining of difficult-to-cut and heat-resistant materials. On the contrary, this is harder to conclude for drilling, because there is a lack of studies on this field. On the other hand, the number of cryogenic milling studies is increasing, especially in 2017. The titanium alloy Ti-6Al-4V is the most researched workpiece material in the field of cryogenic milling and drilling with assistant CO2