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입체각 내에서 경사각에 대한 과냉 현상에 관한 실험적 연구
성진현(Jin-Hyuen Seong),차대룡(Dae-Lyong Cha),박경주(Gyeong-Ju Bak) 산업기술교육훈련학회 2010 산업기술연구논문지 (JITR) Vol.15 No.1
Supercooling phenomena with pure water in freezing process was studied experimantally from -5℃ to 0℃. Temperature distribution and heat transfer were analyzed on the supercooling phenomena according to the initial temperature, inclined angle and temperature of cooling wall were varied. When the water was cooled from the cooling surface, a supercooling phenomena was appeared. After a while dendrictic ice grew sudenly and dense ice layer began to grow from the surface. The supercooling phenomena duration was the longer with decreasing the inclined angle and initial temperature than those of increasing the inclined angle.
차대룡(Dae-Ryong Cha),성진현(jin-Hyuen Seong) 산업기술교육훈련학회 2009 산업기술연구논문지 (JITR) Vol.14 No.3
Today, the goal-oriented machine tool industry, precision, high-speed, complex function, and are collaborating with a robot. A machine tool itself automatically to replace the cutting tool 5-axis machining center at a time, and ends this operation. Therefore, to improve the structure of the Muti-articulated robot can enhance the strength, productivity is expected to have a big effect. Structural Analysis and Dynamic characteristic was able to improve our weak joints. Awards and to improve the bottom two places about 22% Dynamic characteristic be improved. Therefore, the optimal design of the robot working space and high-rigidity and if you can take advantage of the flexibility in the development of a good industrial robot.