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6CCVD Research

Development of a Pulse Generator for Rough Cutting of Oil-based Micro Wire-EDM

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2016-01-01
JournalProcedia CIRP
AuthorsMuā€Tian Yan, Tsungā€Chien Lin
InstitutionsHuafan University
Citations11

Abstract

Section titled ā€œAbstractā€

This paper aims to develop a specific pulse generator for rough cutting of oil-based micro wire electrical discharge machining (wire-EDM). A two-stage current-limiting resistance power supply was presented to suppress thermal damage on the machined surface of polycrystalline diamond (PCD) while achieving stable machining by supplying high open voltage and low discharge current pulse waveforms. Tests revealed that the two-stage resistance power supply could achieve lower thermal damaged layer, better surface quality and surface finish than a conventional pulsed power supply since the former could provide smaller peak current and shorter discharge duration than the later. Experimental results demonstrate that boron-doped polycrystalline composite diamond (BD-PCD) is superior to polycrystalline diamond in the smoothness of cutting edge, surface quality and surface roughness since the former has lower specific resistance and thermal conductivity than the later. This study has indicated that the proposed power supply could enable a prototype micro wire-EDM machine to achieve a surface finish as low as 0.45 Ī¼m Ra and a thermal damaged layer as small as 6 Ī¼m on the machined surface of BD-PCD after one rough machining operation.

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

References

Section titled ā€œReferencesā€
  1. 2004 - Cutting of Polished Single-Crystal Silicon by Wire Electrical Discharge Machining [Crossref]
  2. 2007 - A new Dielectric for Wire-EDM, Proceedings of the 15th International Symposium on Electromachining (ISEM XV), Pittsburgh
  3. 2009 - Development of New PCD Made Up of Boron Doped Diamond Particles and Its Machinability by EDM [Crossref]
  4. 2012 - Study on Thinning of a Boron-doped Polycrystalline Diamond Wheel-Tool by Micro Rotary W-EDM Approach [Crossref]
  5. 2004 - Using Ultra Thin Electrodes to Produce Micro-parts with Wire-EDM [Crossref]
  6. 2013 - An Experimental Study on Micro Wire-EDM of Polycrystalline Diamond Using a Novel Pulse Generator [Crossref]

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