Micro Three-Dimensional Cavities Tools Fabrication on PCD by mu-EDM Scanning Process

作者：Sheu Dong Yea; Cheng Chung Chieh^*

来源：Materials and Manufacturing Processes, 2012, 28(1): 42-47.

DOI：10.1080/10426914.2012.718468

• mu-EDM
• Micromachining
• Polycrystalline diamond
• WEDG

This study describes the use of micro electro-discharge machining (mu-EDM) scanning technology to fabricate micro three-dimensional cavities and microtools fabrication on polycrystalline diamonds (PCD). The experimental results show that short-pulse discharge from an resistor-capacitor (RC) circuit is more effective and precise than a transistor (Tr) pulse generator while machining PCDs by mu-EDM. The surface roughness of PCD using the mu-EDM scanning process could be as small as Ra 0.2 mu m, even when the diamond grain size is considerably larger. Moreover, small PCD tools for cutting brittle materials could be easily fabricated by the same mu-EDM process. Thanks to their hardness and excellent thermal conductivity, PCDs could be utilized in the near future, not only for micro molds, but also for tools to cut brittle material.

• 出版日期2012