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멀티 스케일 다중 전개형 협업 로봇을 위한 요소 기술 개발
주종남(Chong Nam Chu),김한(Haan Kim),김정률(Jeongryul Kim),송성혁(Sung-Hyuk Song),고제성(Je-Sung Koh),허승주(Sungju Huh),하창수(ChangSu Ha),김종원(Jong Won Kim),안성훈(Sung-Hoon Ahn),조규진(Kyu-Jin Cho),홍성수(Seong Soo Hong),이동준(Do Korean Society for Precision Engineering 2013 한국정밀공학회지 Vol.30 No.1
주종남(Chong Nam Chu),박민수(Min Soo Park) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
Creative engineering design course has been offered at Seoul National University since 1993. The purpose of this course is to teach basic skills to design, fabricate and test electro-mechanical device through hands-on experience. The major efforts in this course are on creativity and engineering experience. The course consists of 2 hours of lecture and 2 hours of laboratory (3 credit course). On the first day of the semester, students form teams of five students. At the 3rd week, linkage project is assigned. For 2 weeks, each team makes two simple linkages. At the 6th week, game rules are announced and material kits are distributed for the main robot contest. Each team freely designs and makes one wire controlled robot and one autonomous robot. At the 11th week, robot contest is held using the robots students made during the semester. Final grade is based on the results of the projects, contest, and class/lab attendance.
유리의 미세 초음파 가공 시 입구 진원도 향상 및 출구 크랙방지
홍지훈,김덕환,주종남,김보현,Hong, Ji-Hoon,Kim, Duck-Hwan,Chu, Chong-Nam,Kim, Bo-Hyun 대한기계학회 2007 大韓機械學會論文集A Vol.31 No.10
Ultrasonic machining (USM) is suitable for machining hard, brittle and non-conductive materials such as silicon, glass and ceramics. Usually, when micro holes are machined on glass by USM, roundness of hole entrance is poor and cracks appear around the hole exit. In this paper the machining characteristics were studied for roundness improvement and exit crack prevention. From experiments, the tool bending and the shape of tool tip affect hole roundness. When the tool tip is hemispherical, good roundness of holes was obtained. The feedrate and the rotational speed of the tool affect the exit crack. With the machining conditions of 150 rpm in spindle speed and $0.5\;{\mu}m/s$ in feedrate, micro holes with less than $100\;{\mu}m$ in diameter were machined without an exit crack.