TAILIEUCHUNG - Electrical discharge machining using a strip electrode
(BQ) 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. | Precision Engineering 37 (2013) 738–745 Contents lists available at SciVerse ScienceDirect Precision Engineering journal homepage: Electrical discharge machining using a strip electrode Ki Young Song a , Do Kwan Chung b , Min Soo Park c , Chong Nam Chu a,∗ a School of Mechanical and Aerospace Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea School of Robot and Automation Engineering, Dongyang Mirae University, 445 Gyeongin-ro, Guro-gu, Seoul 152-714, Republic of Korea c Department of Mechanical System Design Engineering, Seoul National University of Science and Technology, 172 Gongreung 2-dong, Nowon-gu, Seoul 139-743, Republic of Korea b a r t i c l e i n f o Article history: Received 31 July 2012 Received in revised form 22 December 2012 Accepted 20 February 2013 Available online 28 February 2013 Keywords: EDM ED-milling Strip EDM a b s t r a c t 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
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