Manufacturing Porous Diamond with Skeleton Structure from PCD by EDM and its Application to Grinding Tools

Abstract:

This paper proposes a new PCD (polycrystalline diamond) wheel with porous skeleton structure realized by removing the cobalt binder from PCD by EDM (electrodischarge machining), and investigates the grinding characteristics of the wheel. The pores are made successfully on PCD by adopting appropriate EDM conditions. The efficiency of making the pores is found to be higher, when the size of the diamond grains in the PCD material is small, and jumping motion to the copper electrode is not given during the EDM. A porous PCD grinding wheel made by this method using a rotating circular PCD (grain size of 10'm) disc of 20mm diameter has a good skeleton structure with sufficient projections on the wheel surface. A satisfactory grinding characteristics with a surface finish of Ra=0.02'm in grinding on a tungsten carbide work is achieved.

• Periodical: Key Engineering Materials (Volume 329)
• Pages: 471-476
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.329.471
• Online since: January 2007
• Authors: Kiyoshi Suzuki, Danyang Zhang, Yoichi Shiraishi, Manabu Iwai, Tetsutaro Uematsu, Shinichi Ninomiya, Sadao Sano
• Keywords: Diamond Tool, Electro Discharge Machining (EDM), Grinding, Polycrystalline Diamond (PCD), Porous Diamond, Skeleton Structures

References

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