Investigation on the influence of the dielectrics on the material removal characteristics of EDM |
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| Affiliation: | 1. School of Mechanical Engineering, Shandong University, Jinan 250061, China;2. Key Laboratory of High Efficiency and Clean Mechanical Manufacture of Ministry of Education, Shandong University, Jinan 250061, China;1. Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-Naka, Kita-ku, Okayama 700-8530, Japan;2. TOWA Corporation, Kamitoba, Minami-ku, Kyoto 601-8105, Japan;1. Head of Department, Department of Mechanical Engineering, Mahendra Institute of Engineering and Technology, Namakkal, Tamilnadu;2. Materials & Mechanical Entity, Vikram Sarabhai Space Centre - ISRO, Trivandrum, Kerala;3. Head of Department, Department of Mechanical Engineering, Mahendra Institute Technology, Namakkal, Tamilnadu;4. Mechanical Engineering, Mahendra Institute of Engineering and Technology, Namakkal, Tamilnadu;5. Department of Mechanical Engineering, Dhanalakshmi Srinivasan college of Engineering and Technology, Chennai;1. Key Laboratory of High Efficiency and Clean Mechanical Manufacture (Ministry of Education), School of Mechanical Engineering, Shandong University, Jinan, China;2. School of Art and Design, Chuzhou University, Chuzhou, China;1. School of Mechanical Engineering, Shandong University, Jinan 250061, China;2. Key Laboratory of High Efficiency and Clean Mechanical Manufacture of Ministry of Education, Shandong University, Jinan 250061, China |
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| Abstract: | A systematical and comprehensive investigation of the material removal characteristics of the electrical discharge machining (EDM) process using various dielectrics as the working fluids was conducted in this work. Five dielectrics, including gaseous dielectrics, air and oxygen, and liquid dielectrics, de-ionized water, kerosene and water-in-oil (W/O) emulsion were used as the working fluids. The whole geometry parameters of the craters, including the recast material in the craters, were precisely determined by metallographic method. The volume of melted and removed material and removal efficiency in different dielectrics were comparatively investigated. By relating the material removal characteristics to the evolution of the discharge generated bubbles in different dielectrics which was done by computer simulation, it seems that the pressure above the discharge point is an important factor that can affect material removal characteristics. The results of this work were supposed to be helpful for further clarifying the complicated material removal mechanism of EDM. |
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| Keywords: | EDM Crater Dielectric Material removal Bubble |
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