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- Title
Effect of graphite powder in kerosene as a working fluid for improving micro ED-drilling.
- Authors
Kim, Yoo-Seok; Kim, Seong Han; Song, Ki Young
- Abstract
Micro electrical discharge drilling (ED-drilling) is a machining method used to make micro holes in hard-to-cut materials. The RC-discharge generator is often used because it creates a short and strong discharge spark. However, this method has issues such as current oscillation between tool electrode and workpiece, causing polarity changes that increase tool wear, and a low material removal rate due to long spark delay time. Furthermore, micro ED-drilling results in a large taper angle due to second discharge sparks created by debris in the narrow gap. To address these issues, the effect of adding graphite powder to the working fluid was studied. The graphite powder in kerosene created a bridge effect that reduced tool wear and taper angle, while improving MRR and surface roughness. The electrical conditions were not changed, and the machining process was improved by only altering the working fluid without modifying the existing system.
- Subjects
WORKING fluids; KEROSENE; GRAPHITE; POWDERS; CURRENT fluctuations; ELECTROCHEMICAL cutting; ELECTRIC metal-cutting
- Publication
Journal of Mechanical Science & Technology, 2024, Vol 38, Issue 5, p2527
- ISSN
1738-494X
- Publication type
Article
- DOI
10.1007/s12206-024-0431-3