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김현섭(H. S. Kim),이택민(T. M. Lee),김동수(D. S. Kim),최병오(B. O. Choi),김광영(K. Y. Kim) 한국정밀공학회 2004 한국정밀공학회 학술발표대회 논문집 Vol.2004 No.10월
The structures of airplane consist of sheet metal part, heavy machined part, and so on, which generate enormous amounts of cutting chip when these parts are machined. The cutting chip detoriorates the part quality and production efficiency. Therefore, cutting chip collecting apparatus is necessary for better quality and efficiency. In this study, blowing type cutting chip collecting apparatus was newly proposed and the concept design of the apparatus was examined through numerical analysis. Computations using the mass-averaged implicit 2D Navier-Stokes equations are applied to predict the nozzle flow field. The standard k-e turbulent model are employed to close the governing equations. Consequently, this study shows that the suggested blowing type cutting chip collecting apparatus can be alternative to existing expensive chip collecting apparatus.
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.