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Electrical Discharge Machining Electrodes Manufactured via Selective Laser Sintering Technique Using New Composite Materials

[+] Author Affiliations
Fred Lacerda Amorim, Tiago Czelusniak, Camila Higa

Pontifical Catholic University of Parana - PUCPR, Curitiba, PR, Brazil

Paper No. IMECE2013-62345, pp. V015T16A002; 10 pages
doi:10.1115/IMECE2013-62345
From:
  • ASME 2013 International Mechanical Engineering Congress and Exposition
  • Volume 15: Safety, Reliability and Risk; Virtual Podium (Posters)
  • San Diego, California, USA, November 15–21, 2013
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5644-4
  • Copyright © 2013 by ASME

abstract

The cost of a part manufactured by Electrical Discharge Machining (EDM) is mainly determined by electrode cost. The production of electrodes by conventional machining processes is complex, time consuming and can account for over fifty percent of the total EDM process costs. The emerging Additive Manufacturing (AM) technologies provide the possibility of direct fabrication of EDM electrodes. Selective Laser Sintering (SLS) is an alternative AM technique because it has the possibility to directly produce functional components, reducing the tool-room lead time and total EDM costs. The main difficulty of manufacturing an EDM electrode using SLS is the selection of an appropriate material, once both processes require different material properties. The current work focused on the investigation of appropriate materials that fulfill EDM and SLS process demands. Three new metal-matrix materials composed of Mo-CuNi, TiB2-CuNi and ZrB2-CuNi were developed and electrodes under adequate SLS conditions were manufactured. EDM experiments using different discharge energies were carried out and the performance evaluated in terms of material removal rate and volumetric relative wear. The results showed the powder systems composed of Mo-CuNi, TiB2-CuNi and ZrB2-CuNi revealed to be successfully processed by SLS and the EDM experiments demonstrated that the newly composite electrodes possess superior performance when compared to copper powder electrodes made with SLS. The work also suggests important topics for future research work on this field.

Copyright © 2013 by ASME

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