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경량 피스톤 로드를 위한 마찰용접 적용연구(SM45C/SM45C-Pipe 사용)
민병훈,임형택,민택기,Min, Byung-Hoon,Lim, Hyung-Taek,Min, Taeg-Ki 대한용접접합학회 2008 대한용접·접합학회지 Vol.26 No.2
Various research to reduce weight of a car is achieving. This research is tendencious to manufacture solid piston rod of shock absorber as hollow piston rod using friction welding. This study deals with the friction welding of SM45C to SM45C-Pipe that is used in car shock absorber, The friction time was variable conditions under the conditions of spindle revolution of 2,000rpm, friction pressure of 55MPa, upset pressure of 75MPa, and upset time of 2.0seconds. Under these conditions, the microstructure of weld interface, tensile fracture surface and mechanical tests were studied of friction weld, and so the results were as follows. 1. In tensile strength, the hole processing is better than non-hole processing. 2. When the friction time was 1.5seconds under the conditions, the maximum tensile strength of the friction weld happened to be 869MPa, which is 103% of SM45C's tensile strength and 91% of SM45C's Pipe. 3. When the friction time was 2.0seconds under the conditions, the maximum bending strength of the friction weld happened to be 1599MPa, which is 80% of SM45C's bending strength and 118% of SM45C's Pipe.
민병훈(Byung-Hoon Min),최원용(Won-Yong Choi),민택기(Taeg-Ki Min) 한국생산제조학회 2008 한국생산제조학회지 Vol.17 No.6
This study is to evaluate the tool life of portable beveler which have various cooling system. It was compared with 3 different bevelers which has each other cooling system. Beveler A has no cooling system, beveler B has the cooling system for only inside of body, and beveler C has the cooling system for both the cutter and inside of body. The temperature of beveler A cutter surface had been continuously increasing as processing, but the rising tendency of temperature of beveler B cutter surface has slightly changed. In case of beveler C, the temperature is maintained. The tool life of beveler C is about 105m which is around 400% of beveler A(25m), and around 130% of beveler B(80m).
반복적인 복통과 복수로 발현한 C1 에스테라제 억제제 결핍증 1예
민병훈 ( Byung Hoon Min ),장동경 ( Dong Kyung Chang ),김영호 ( Young Ho Kim ),이풍렬 ( Poong-lyul Rhee ),김재준 ( Jae J. Kim ),이종철 ( Jong Chul Rhee ) 대한장연구학회 2007 Intestinal Research Vol.5 No.1
C1 esterase inhibitor deficiency is a disorder resulting from a qualitative or functional defect of the C1 esterase inhibitor. It is characterized by recurrent episodes of subcutaneous and submucosal swellings in any part of the skin and the respiratory and gastrointestinal tracts. Gastrointestinal symptoms such as abdominal pain are the dominant symptoms in about 25% of cases and sometimes make this condition misunderstood as surgical emergency, especially when ascites is accompanied. We experienced a case of C1 esterase inhibitor deficiency in a 35-year-old woman presenting with recurrent abdominal pain, ascites, and lower extremities edema. Her symptoms first occurred 8 years ago, and used to spontaneously resolve within 3 days. In laboratory finding, serum C4 and serum C1 esterase inhibitor showed reduced level of 3.2 mg/dL and 5 mg/dL, respectively. After treatment with danazol and tranexamic acid, no more recurrence of symptoms was observed during 2 months of follow-up period. (Intest Res 2007;5:73-76)
閔病薰(Byung-Hoon Min),張禹鎭(Woo-Jin Jang),高寅錫(In-Suk Ko) 대한전기학회 2006 전기학회논문지 B Vol.55 No.8
Even the case DC circuit Breaker have good quality for interruption of high current like heavy load current, short-circuit current, the verification for small current breaking capability of circuit breaker should be performed. It comes from the reason DC small current breaking failure can be lead to break out second heavy fault condition and in the long run substation shutdown. In this paper, we can find the characteristics of DC small current and international test standard discription about small current breaking and one of the proper solution to get over it.
『다케토리 모노가타리』의 이중적 서술 구조와 연결 매개체
민병훈(Min, Byung-Hoon) 대한일어일문학회 2018 일어일문학 Vol.79 No.-
“Taketori Monogatari” introduces various stories such as ‘an eccentric person"s birth story’, ‘wife-obtaining fight story’, ‘derivation story’, and ‘fairy robe-related story’. Just as shown in the names, they could be divided into stories with realistic materials and stories with unrealistic materials. However, in the parts like ‘development and growth of Kaguyahime’ and ‘proposal and ascension of the emperor’ with the unrealistic materials, the narrators and characters do not show any self-awareness of the unreality as the story develops under the realistic sense. On the other hand, in the part like ‘five young nobles proposal’ which intentionally mixes the unrealistic materials in the real world, the clear perception of the unreality is built on. In order to combine the double-narrative structure stories for a Monogatari work, the author uses several connecting links such as ‘marriage’, ‘treasure in imagination’ shown in the legend, and ‘rumor’. And here, an ‘old man’ plays a role of mediator in tying stories into one. “Taketori Monogatari” has become an ancestor of Japanese novels by deriving diverse-types of novels. However, the novels that realistically handle unrealistic materials gradually decline, and only Monogatari based on the stories with realistic materials is inherited. “Taketori Monogatari” could be evaluated as a work playing the role of driving force in the transitional period from the unrealistic myths or stories to the Japanese-style reality novels, Monogatari literature.