학술지명: Precision Engineering
발표일자: 2013년 7월
SCI여부 : SCIE
제목: Electrical discharge machining using a strip electrode
저자: 송기영(서울대학교) 정도관(동양미래대학교) 박민수(서울과학기술대학교) 주종남(서울대학교)
내용: 스트립 전극 장치를 이용한 방전밀링을 고안하고 기존의 가공방법과 비교함.
One of the most significant problems of electrical discharge machining (EDM) is electrode wear, which results in shape errors and low productivity. In this study, a new EDM method using a strip electrode (strip EDM) was developed in order to overcome the wear problem. The strip EDM uses a continuously applied strip electrode that is similar to the wire electrode used in wire EDM. The strip electrode apparatus can be used as a simple shape tool, which is similar to electrical discharge milling (ED-milling). In the suggested strip electrode method, a conductive strip moves on the electrode guide. The worn strip is removed, and the new strip is supplied continuously. Therefore, the tool electrode can be regarded as having no wear during the machining process. The strip EDM promises precise machining without tool wear and can be substituted for a general ED-milling. This method uses a conductive strip made of copper or brass. To estimate the machining performance of the strip EDM, the material removal rate (MRR) and surface quality were investigated according to the machining parameters, such as depth of cut, peak current, and tool materials. The machining results were compared with the results from general ED-milling. In the practical machining study, precise molds with 3D shapes were machined using the strip EDM method.