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김용우(Yong-Woo Kim),최수창(Soo-Chang),박정우(Jeong-Woo Park),이재종(Jae-Jong Lee),이득우(Deug-Woo Lee) 한국기계가공학회 2008 한국기계가공학회 춘추계학술대회 논문집 Vol.2008 No.-
Currently, piezoelectric actuators which have attractive features such as high output force, high positioning resolution, high stiffness and quick response have been used in many ultra precision stages. An amplifier is needed for PZT to move minutely. This paper presents a nano PZT amplifier which can control motion of PZT stage minutely. New designed amplifier has benefit that is high response, low noise level, and low cost. We designed circuit of amplifier and investigated the characteristics of the PZT amplifier.
이승준(Seung-jun Lee),신인동(In-dong Shin),최수창(Soo-chang Choi),김용우(Yong-woo Kim),이종렬(Jong-Ryul Lee),이득우(Deug-woo LEE) 한국생산제조학회 2010 한국생산제조학회지 Vol.19 No.3
The development of high-speed spindle have been studied extensively for micro machining in advanced industrial countries. The research of miniaturized high-speed air spindle is important part which needs for the micro machining process of high quality. So, This study was to carry out results about design characteristics of miniaturized high-speed air spindle. We had designed 4type turbines and shaft. They were simulated in use the computer simulation programs. We made them as products. They measured RPM (revolutions per minute). As a result of experiments, there was a contrast among 4type Turbines. it reached 384,000rpm in 4.5bar of air pressure. And, We tried to compare the results of measurement whit the results of computer simulation.
이승준(Seung-Jun Lee),김용우(Yong-Woo Kim),김귀순(Kui-Soon Kim),이득우(Deug-Woo Lee),한명철(Myung-Chul),이종열(Jong-Ryul Lee) 한국기계가공학회 2007 한국기계가공학회 춘추계학술대회 논문집 Vol.2007 No.-
Dental air turbine hand pieces are manufactured with a wide range of alternative design features which may influence their suitability for particular clinical procedures. The leading industry nations have been devloped design technology and manufacturing technology from 19th century. In this article the passibility of the manufacturing of air turbine hand pieces composed of very small sized parts is presented.
Surface Topography on Silicon by AFM-based Nanomachining using PCD Tip
Jeong Woo Park(박정우),Deug Woo Lee(이득우) 한국기계가공학회 2009 한국기계가공학회 춘추계학술대회 논문집 Vol.2009 No.6
This paper demonstrates mechanical nanomachining of single crystal silicon using an atomic force microscope with a polycrystalline diamond (PCD) tip cantilever. To enable nanomachining of silicon, a nanomachining cantilever with a pyramidal PCD tip was developed using mems-based photolithography and hot-filament chemical vapor deposition (HF-CVD). Mechanical nanomachining experiments on silicon using the cantilever are demonstrated under various machining parameters. Our results showed that either protruding or depressed patterns could be generated on the scratched surface by controlling normal load, scan pitch, and etching condition. The unique mask effect of brittle material after mechanical scratching under PCD tool can be controlled by the conventional mechanical machining conditions such as chip formation, plastic flow, and material removal.
소형 스핀들 시스템 적용을 위한 형상기억합금 기반 공구 클램핑 장치의 체결특성 고찰
신우철(Woo-Cheol Shin),노승국(Seung-Kook Ro),박종권(Jong-Kweon Park),이득우(Deug-Woo Lee),정준모(Jun-Mo Chung) 한국생산제조학회 2007 한국생산제조학회지 Vol.16 No.6
In this paper, a rotating tool clamping device was developed based on a shape memory alloy(SMA) and its feasibility as a tool holder was experimentally explored. The SMA-based device was able to alter clamping to unclamping through temperature control within 1 second. The means and repeatability(σ) of the tool clamping force were 185.5N and 6N respectively and its drifts were less than 3% for an hour. Considering the temperature hysteresis of the SMA-based tool clamping device, it is necessary to heat the SMA ring to around 50℃ after tool change to obtain more clamping force.
Surface Topography on Silicon by AFM-based Nanomachining using PCD Tip
Jeong Woo Park(박정우),Deug Woo Lee(이득우) 한국기계가공학회 2009 한국기계가공학회 춘추계학술대회 논문집 Vol.2009 No.6월
This paper demonstrates mechanical nanomachining of single crystal silicon using an atomic force microscope with a polycrystalline diamond (PCD) tip cantilever. To enable nanomachining of silicon, a nanomachining cantilever with a pyramidal PCD tip was developed using mems-based photolithography and hot-filament chemical vapor deposition (HF-CVD). Mechanical nanomachining experiments on silicon using the cantilever are demonstrated under various machining parameters. Our results showed that either protruding or depressed patterns could be generated on the scratched surface by controlling normal load, scan pitch, and etching condition. The unique mask effect of brittle material after mechanical scratching under PCD tool can be controlled by the conventional mechanical machining conditions such as chip formation, plastic flow, and material removal.