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분산상 모드를 이용한 1채널 최소 절삭유 가공 시스템의 미스트 포집 챔버 내 액화 현상 해석
최영재,박거락,신주혜,이창수,이득귀,박영창,허진,권형진,김건우,심동하 한국생산제조학회 2022 한국생산제조학회지 Vol.31 No.6
The minimum quantity lubrication (MQL) system, which minimizes the use of a coolant, has recently been in the spotlight as a new machining system to overcome environmental problems. However the liquefaction of the oil mist at the collection chamber should be overcome. This study analyzes the oil mist liquefaction of the one-channel internal lubricant feed MQL system using computational fluid dynamics (CFD) and proposes the shape of the mist collection chamber that can reduce mist liquefaction. A discrete phase model (DPM) is used to simulate mist liquefaction, and the air and oil flow rates used in an actual MQL system are applied. After analyzing the reference model, a parametric study is conducted to derive the trend between the shape of the mist collection chamber and the liquefaction of the mist. The study results confirmed that the liquefaction can be reduced by changing the shape of the mist collection chamber.
수용성 절삭유의 부패방지를 위한 온도와 초음파 가진의 영향에 관한 연구
노태민,Axel Lefebure,김민욱,박동혁,최지섭,신대견,김태호,유민혁,고병호,신주혜,이창수,이득귀,박영창,허진,권형진,심동하 한국생산제조학회 2022 한국생산제조학회지 Vol.31 No.2
This study analyzes the ineffectiveness of ultrasonic treatment for used cutting fluid sterilization. The microorganism population in a water-soluble cutting fluid sample was observed while applying a 40-kHz ultrasound with a power density level of 0.27 and 0.37 W/cm², respectively. The ultrasonic treatment was accompanied by a temperature rise due to the heating effect of cavitation or ultrasonic components. It was observed that the population does not vary below ~45℃, and drops rapidly as the temperature rises. This phenomenon is further investigated using a heater to provide the heating effect. The results showed that the population drops faster at a higher temperature; and there was no significant difference in the population pattern between the ultrasonic and heat treatments at a constant temperature of ~50℃. The overall results showed that ultrasonic treatment does not reduce the microorganism population in the cutting fluid, where temperature is a dominant factor.
MQL(Minimum Quantity Lubrication) 부품 및 시스템 개선을 위한 기초 연구
신주혜(J. H. Shin),원도연(D. Y. Weon),전광훈(G. H. Jeon),송창민(C. M. Song),남연수(Y. S. Nam),안효진(H. J. An),조소영(S. Y. Cho),Lefebure Axel,이득귀(D. K. Lee),이창수(C. S. Lee),박영창(Y. C. Park),허진(J. Heo),김경동(K. D. Kim),이상엽(S. 한국생산제조학회 2019 한국생산제조시스템학회 학술발표대회 논문집 Vol.2019 No.5