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제3차 대한간학회 춘계학술대회 초록집 : 포스터연제 토의 ; 31세에 급성 간부전의 형태로 발현된 Wilson씨병 1예
최정 ( Choe Jeong ),송일한 ( Song Il Han ),김화영 ( Kim Hwa Yeong ),진영주 ( Jin Yeong Ju ),임창영 ( Im Chang Yeong ),김정원 ( Kim Jeong Won ),노임환 ( No Im Hwan ),명나혜 ( Myeong Na Hye ) 대한간학회 1997 Clinical and Molecular Hepatology(대한간학회지) Vol.3 No.2(S)
이효렬(Hyo-Ryeol Lee),곽용길(Yong-Kil Kwak),김화영(Hwa-Young Kim),안중환(Jung-Hwan Ahn),여명헌(Myeong-Heon Yeo) 한국생산제조학회 2011 한국생산제조학회지 Vol.20 No.5
It is well known that abrasive waterjet (AWJ) was developed as a kind of high-density energy processing technologies. AWJ is used to obtain cutting quality of various materials such as metal, ceramics, glass and composite materials within a short manufacturing time because of the characteristics of heatless and noncontact processing. However, surface roughness and dimension error like round, burr, taper vary severely according to the processing conditions such as pressure, cutting speed, orifice diameter, stand off distance and abrasive flow rate. In this paper, the effect of the shape of mixing chamber on surface quality is studied. Three types of mixing chamber - round, parabolic, elliptical ? are suggested and each performance is compared to that of cylindrical mixing chamber experimentally. From the result, is proved to be the optimal mixing chamber in the aspect of surface quality the parabolic one.