Performance of Ultrasonic Electro-Discharge Machining on Electrically Conductive PCD

Abstract:

Electrically conductive polycrystalline composite diamond (EC-PCD) material, which consists of electrically conductive diamond particles, has recently been developed for the purpose of providing the material with both excellent tool properties and machinability. This paper deals with effects of giving ultrasonic vibrations to an electrode on the EDM characteristics of EC-PCD with a view to achieve a great improvement in electro-discharge performance. In this series of EDM experiments, three types of ultrasonic vibration modes were selected (axial vibration, flexural vibration and complex vibration). The result showed that the removal efficiency of EC-PCD increased in any vibration modes. Especially when axial vibration with large amplitude and complex vibration composed of axial mode and flexural mode were given to the electrode, removal efficiency became four times higher than that obtained when no vibration was given. And, electrode wear rate was reduced to one third or 68% against the value of 187% obtained when no vibration was given. Furthermore it was shown that the effects resulted from not only the cavitation action of the working fluid but also the vibrational action of the electrode itself.

• Periodical: Advanced Materials Research (Volume 628)
• Pages: 101-106
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.628.101
• Online since: December 2012
• Authors: Manabu Iwai, Zhi Rong Zhou, Tokiteru Ueda, Shinichi Ninomiya, Kiyoshi Suzuki
• Keywords: Copper Electrode, EDM, Electrically Conductive PCD, Electrode Wear, Material Removal Rate (MRR), Ultrasonic Vibration

References

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