Micro-cutting characteristics of EDM fabricated high-precision polycrystalline diamond tools

Zhiyu Zhang, Huanming Peng, Jiwang Yan

Research output: Contribution to journalArticle

60 Citations (Scopus)

Abstract

To fabricate three-dimensional microstructures, such as micro dimples, micro grooves and micro channels, on ceramic mold materials, tool fabrication with super hard materials is an essential step. In this work, micro electro discharge machining (EDM) was used to fabricate high-precision polycrystalline diamond end mills. Form accuracy and edge sharpness in one micron level were achieved by utilizing electro discharge induced graphitization of diamond grains under extremely low discharge energy conditions. The cutting performance of the fabricated tools was examined by machining micro dimples and micro grooves on tungsten carbide mold substrates. Results showed that using the EDMfabricated tools, ductile mode machining of tungsten carbide was realized with a surface finish of 2 nm Ra, which is comparable to that produced by polishing.

Original languageEnglish
Pages (from-to)99-106
Number of pages8
JournalInternational Journal of Machine Tools and Manufacture
Volume65
DOIs
Publication statusPublished - 2013 Feb

Keywords

  • Electro discharge machining
  • Micro cutting
  • Micro end mill
  • Mold fabrication
  • Polycrystalline diamond
  • Structured surface

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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