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이택민(T.M.Lee),김동수(D.S.Kim),조정대(J.D.Jo),양정순(J.S.Yang),강태구(T.G.Kang),김광영(K.Y.Kim) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
In this paper, we present a design, fabrication and performance test of the novel DoD metal-jet injector for application to the high-density and high-temperature-melting materials. We design the gap adjustable DoD injector for controlling the size, speed and direction of the ejected metal droplets. The effect of design parameters on droplet size was analyzed. Fabricated gap adjustable injector ejects the D.I. water microdroplets whose measured volume is 7.23nl with the 4.8m/sec velocity through the 50㎛-diameter nozzle. Also the injector print the metal microdots, whose diameter is about 600㎛, on the glass at the chamber temperature of 200℃. Consequently, present novel metal-jet injector has a potential to applications for the fabrication of the low-cost fabrication of the electronic devices.
항공기 기체 가공용 대용량 절삭칩 회수 장치의 설계 평가
김광영(K.Y. KIm),이택민(T.M. Lee),김동수(D.S. Kim),최병오(B.O. Choi),조용주(Y.J. Cho) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
A single-piece-machined-part has superior characteristics to an assembly of several pieces of part especially for aircraft components. It is necessary to develop high efficient 'multi-head router machine' for machining a large size single-piece-part on a large scale. In this type machine, many cutting chips are generated. These chips should be removed automatically for productivity and part precision. In this study, the design evaluation of the cutting chip collecting apparatus for 'multi-head router machine' was complemented using performance test and finite element analysis.
3DP 공정을 이용한 오피스용 임의형상 제작시스템(SFFS)에 관한 연구
이원희(W. H. Lee),김동수(D. S. Kim),이택민(T. M. Lee) 한국정밀공학회 2004 한국정밀공학회 학술발표대회 논문집 Vol.2004 No.10월
SFF(solid freeform fabrication) is another name of RP(rapid prototyping). The SFFS for office type wishes to develop system that can produce small object such as hand phone, cup, accessory etc. with high speed, and also intend suitable system in office environment by compact design, and buy easily by inexpensive price. As can manufacture high speed in existent SFF process technology, representative process that have competitive power in price is 3DP (three dimensional printing) technology. The 3DP technology is way to have general two dimensional printing technology and prints to three dimension, is technology that make three-dimensional solid freeform that want binder doing jetting selectively on powder through printer head. We designed and manufactured SFFS for office based on 3DP process technology design and manufactured, and composed head system so that use 3 printer heads at the same time to improve the fabrication speed of system. We used printer head of INCJET company and cartridge used HP45 series model who can buy easily in general city. And we directly fabricated three dimensional solid freeform using developed SFFS for office type.