Precise Machining Method by Combining EDM and Grinding with a Rotary PCD Segment Tool for Cemented Carbide

Fumio Koga; Shinichi Ninomiya; Kiyoshi Suzuki

doi:10.4028/www.scientific.net/AMR.1136.446

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1136Precise Machining Method by Combining EDM and...

Precise Machining Method by Combining EDM and Grinding with a Rotary PCD Segment Tool for Cemented Carbide

Abstract:

In our previous research, precise groove machining could be achieved on a cemented carbide workpiece by utilizing a combined method of EDM and grinding using only a single tool, i.e. a rotary PCD disc tool acting as an electrode for EDM and as a wheel for grinding. In this study, the authors applied this method to forming a 3D shape on a cemented carbide workpiece. Firstly, an EC-PCD disc-shaped tool of φ33.4mm was mounted on a spindle of the EDM machine vertically to the workpiece. And the tool was rotated to make a spherical concave on the workpiece by EDM. The surface roughness of the workpiece was Rz=6.4μm and no electrode wear resulted at all. Secondly, the EDMed surface was ground with the same PCD tool. As a result, the improved surface roughness of Rz=1.7μm was obtained on the workpiece maintaining the precise tool profile and dimension.

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Periodical:

Advanced Materials Research (Volume 1136)

Pages:

446-451

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1136.446

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Online since:

January 2016

Authors:

Fumio Koga*, Shinichi Ninomiya, Kiyoshi Suzuki

Keywords:

Cemented Carbide, EC-PCD, EDM, Grinding, Rotary PCD Segment Tool

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References

[1] S. Sano, W. Pan, M. Iwai, S. Ninomiya, T. Uematsu and K. Suzuki, Hybrid processing of EDM and grinding with an ED-T-formed PCD tool, Advances in Abrasive Technology 10. Detroit, USA (2007) 351-357.

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