Sinking EDM in water-in-oil emulsion

In this paper, a new type of sinking electric discharge machining (EDM) dielectric–water-in-oil (W/O) emulsion is proposed, and the machining characteristics of W/O emulsion are investigated by comparing with that of kerosene. In the experiments, machining parameters such as the dielectric type, pea...

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Bibliographic Details
Published in:International journal of advanced manufacturing technology 2013-03, Vol.65 (5-8), p.705-716
Main Authors: Zhang, Yanzhen, Liu, Yonghong, Ji, Renjie, Cai, Baoping, Shen, Yang
Format: Article
Language:English
Subjects:
CAE) and Design
Computer-Aided Engineering (CAD
Dielectrics
EDM electrodes
Electric discharge machining
Engineering
Industrial and Production Engineering
Kerosene
Material removal rate (machining)
Mechanical Engineering
Media Management
Original Article
Pulse duration
Surface roughness
Water discharge
Wear rate
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Summary:In this paper, a new type of sinking electric discharge machining (EDM) dielectric–water-in-oil (W/O) emulsion is proposed, and the machining characteristics of W/O emulsion are investigated by comparing with that of kerosene. In the experiments, machining parameters such as the dielectric type, peak current, and pulse duration are changed to explore their effects on machining performance, including the material removal rate (MRR), relative electrode wear rate (REWR), and surface roughness. Experimental results revealed that W/O emulsion could be used as the dielectric fluid of sinking EDM and adopting long pulse duration and large peak current could lead to obtaining higher MRR than kerosene. Compared with kerosene, W/O emulsion is observed to cause lower carbon adhered to the electrode surface. Therefore, its REWR is higher. Statistics of the discharge waveform show that more stable discharge processes can be obtained by using W/O emulsion compared with kerosene. Furthermore, W/O emulsion is more economical and more environmentally friendly than kerosene, and it could be an alternative to kerosene in sinking EDM application.
ISSN:0268-3768
1433-3015
DOI:10.1007/s00170-012-4210-4