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권정재(Jeong-Jae Kwon),조현택(Hyun-Taek Cho),백영종(Yung-Jong Baek),김동수(Dong-Soo Kim) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.10
The 3DP(three dimensional printing) technology is one of the SFF(solid freeform fabrication) technologies which has recently come into a spotlight due to its adaptability to various application. This technology has a great advantage in terms of short fabrication time for a prototype at a low cost, especially when it comes with multi-nozzle inkjet printing technology. In this paper, we introduce a method of office type solid freeform fabrication using multi-piezo head.
SLS 공정을 이용한 산업용 SFF 시스템의 개발 및 소결실험
조홍석(Hong-Seok Jo),조현택(Hyun-Taek Cho),백영종(Yung-Jong Baek),김동수(Dong-Soo Kim) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
Selective Laser Sintering (SLS) is currently recognized as a leading process in the new field of solid freeform fabrication (SFF). It is used to fabricate in a short time any 3 dimensional shapes by layer-by-layer sintering of polymer, ceramic or metal powder. To develop this SFF system, it needs effective laser scanning path, temperature and z-axis control for lamination. Therefore, in this study, through the application of control algorithm for sintering process have performed, temperature evaluation for sintering process has performed and the manufacturing sample using SLS process.
UV Curing 공정을 이용한 오피스용 SFF System 개발
권정재(Jeong-Jae Kwon),조현택(Hyun-Taek Cho),백영종(Yung-Jong Baek),김동수(Dong-Soo Kim) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
The 3DP(three dimensional printing) technology is one of the SFF(solid freeform fabrication) technologies which has recently come into a spotlight due to its suitability to various field. A manufacturing process of product is using many pattern formation technology. The 3DP technology uses multi nozzle that can fabricate three dimensional object of high speed and accuracy. In this paper, we introduce a development of the office type solid freeform fabrication system. This system is used UV resin and multi-piezo head.
Nano CNC Grinding Machine 용 고속 유정압 스핀들 개발-Ⅰ
이충석(Choong-Seok Lee),문홍만(Hong-Man Moon),조용권(Yong-Kwon Cho),조현택(Hyun-Taek Cho),백영종(Yung-Jong Baek),채승수(Seung-Su Chae),이종찬(Jong-Chan Lee) 한국기계가공학회 2006 한국기계가공학회 춘추계학술대회 논문집 Vol.2006 No.-
This paper reports some progress on the development of hydrostatic high speed spindle for "Nano CNC Grinding Machine". The amount of fluid required, the load to be carried, and the temperature rise were calculated to determine the gab of the hydrostatic bearing. A prototype hydrostatic bearing was assembled and a series of experiment were performed. At 10,000rpm, the temperature rise on the front bearing and rear bearing were 4.2℃ and 5.2℃, respectively. The measured rotational error was 0.4㎛ and the thermal displacement on radial direction was 1.8㎛. These results indicate that the high speed hydrostatic bearing developed in this research in applicable in practice.