Abstract
In a dry EDM process, a gaseous dielectric replaces the liquid dielectric. Low MRR, arcing and damage on machined surfaces are the critical issues of this process. This work aims to examine the viability of dry EDM using helium gas dielectric. Experiments were performed to explore the effects of parameters such as voltage (V), current (I), pulse ‘off-time’ (Toff), gas pressure (P) and spindle speed (N) on MRR, TWR, oversize and depth achieved. Statistical analysis using ANOVA showed that spindle speed (N) and discharge current (I) were the most significant in influencing the MRR and the oversize respectively. Analysis of dry EDMed surface morphology indicated that surface damages were lesser by using helium than using oxygen gas dielectric.
| Original language | English |
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| Title of host publication | Proceedings of the 3rd International & 24th AIMTDR |
| Number of pages | 6 |
| Publication date | 2010 |
| Publication status | Published - 2010 |
| Externally published | Yes |
| Event | 3rd International and 24th All India Manufacturing Technology Design and Research Conference - Andhra University, Visakhapatnam, India Duration: 13 Dec 2010 → 15 Dec 2010 |
Conference
| Conference | 3rd International and 24th All India Manufacturing Technology Design and Research Conference |
|---|---|
| Location | Andhra University |
| Country/Territory | India |
| City | Visakhapatnam |
| Period | 13/12/2010 → 15/12/2010 |
Keywords
- Dry EDM
- Helium
- MRR
- TWR
- Oversize
- Depth