Effects of cooling dielectric on electrical discharge machining characteristics of 7075 aluminum alloy

Yasuo Suzuki, Biing Hwa Yan, Hwa Ou Hsu

研究成果: 雜誌貢獻期刊論文同行評審

摘要

In order to investigate the electrical discharge machining characteristics and the improvement on the work surface of 7075 aluminum alloy, a series of EDM tests by using both normal dielectric and cooling dielectric were carried out. Summarizing the data given by EDM experiments, it is verified that the electrical discharge machining characteristics closely related to the discharge energy. The cooling dielectric has a significant influence on the electrical discharge machining characteristics of 7075 aluminum alloy. The main results indicate that the material removal rate of normal EDM is larger than that with cooling dielectric, but it seems certain that material removal mechanism has no difference between both normal EDM and EDM with cooling dielectric. Although, comparing with the normal dielectric, the cooling dielectric seems to has not much effect to restrict the discharge points growth, there is a better work surface finish obtained due to the surrounding recasting rise of melt cavities restricted by using cooling dielectric. It is also found that a thinner recasting layer can be obtained when machining with cooling dielectric.

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頁(從 - 到)543-548
頁數6
期刊Keikinzoku/Journal of Japan Institute of Light Metals
45
發行號10
DOIs
出版狀態已出版 - 1995

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