Abstract
Polycrystalline diamond (PCD) is widely used to fabricate cutting tools. In the electrical discharge machining (EDM) of PCD, thermal damage, such as graphitization of diamond grains, is a critical problem. In this study, we performed EDM of PCD using rotary cupronickel electrodes and investigated the structural changes of PCD by Raman spectroscopy. It was found that the PCD surfaces machined using the rotary cupronickel electrodes were smoother than those in conventional EDM. The results also showed that diamond graphitization decreased when electrical discharge energy decreased and/or when feed rate increased. In order to reduce graphitization of diamond, we proposed a dry EDM finishing method for PCD. Very low surface roughness and low thermal damage were successfully achieved.
| Original language | English |
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| Title of host publication | Proceedings of the 8th International Conference on Leading Edge Manufacturing in 21st Century, LEM 2015 |
| Publisher | Japan Society of Mechanical Engineers |
| Publication status | Published - 2015 Oct 18 |
| Event | 8th International Conference on Leading Edge Manufacturing in 21st Century, LEM 2015 - Kyoto, Japan Duration: 2015 Oct 18 → 2015 Oct 22 |
Other
| Other | 8th International Conference on Leading Edge Manufacturing in 21st Century, LEM 2015 |
|---|---|
| Country/Territory | Japan |
| City | Kyoto |
| Period | 15/10/18 → 15/10/22 |
Keywords
- Electrical discharge machining
- Graphitization
- Polycrystalline diamond
- Subsurface damage
ASJC Scopus subject areas
- Industrial and Manufacturing Engineering