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허남환(N. H. Heo),이석우(S. W. Lee),최헌종(H. Z. Choi) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.11
ll as their high precision is required. In addition, as the national competitiveness is increasingly<br/> affected by the development of the micro parts through micro machining technology, the study of the<br/> micro machining technology is being conducted in many countries. The goal of this study is to<br/> fabricate micro tools under the size of 20mm and to machine micro holes using them. The fabrication is<br/> done by grinding and the application of ELID to the grinding wheel. The surface roughness of the<br/> micro tools is measured to evaluate the study.
이석우(S.W. Lee),최헌종(H. Z. Choi),허남환(N. H. Heo),이종항(J. H. Lee) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.4
Recently, environmental pollution has become a serious problem in industry, and many researches<br/> have been done in order to preserve the environment. The coolant, which promotes lubrication, cooling<br/> and penetration, contains chlorine, sulfur and phosphorus to improve the machining efficiency. These<br/> additives, which move around into the air during machining, pollute working. Therefore, many<br/> researches on how to reduce the amount of coolant during machining have been carried out. However,<br/> to reduce even small amount of coolant causes high temperature of a workpiece and it brings thermal<br/> defects.<br/> In this study, the experiments of wet & dry grinding using cooling methods (using coolant only,<br/> mist and compressed cold air only) are performed to solve the problem of environmental contamination<br/> and to get a better surface integrity of a workpiece by comparing surface roughness, roundness and<br/> residual stress.