Influence of polarity on the performance of Blasting Erosion Arc Machining

Wansheng Zhao, Hui Xu, Lin Gu, Han Hong, K. P. Rajurkar

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

Blasting Erosion Arc Machining (BEAM) is proposed to achieve high-efficiency machining for difficult-to-cut materials such as high-temperature alloys. By creatively controlling the arc plasma with the mechanism named hydrodynamic arc breaking, BEAM can remove bulk material with a high material removal rate (MRR). However, the BEAM generated surface is rough and requires additional post processing. In order to improve the resulting surface quality, positive electrode polarity BEAM was performed by using graphite bundled electrode to machine AISI D2 steel workpiece in this study. Experimental results demonstrate that compared with negative electrode BEAM, machining with positive polarity achieves a better surface quality with less MRR and high relative tool wear ratio (TWR). The explanation of the differences can be attributed to the performance of arc plasma resulting from the variation of the flushing velocity in the discharge gap. Therefore, it is possible to machine with high efficiency and a better control of the profile and surface quality of the workpiece by combining negative and positive (N-P) BEAM processes together.

Original languageEnglish (US)
Pages (from-to)213-216
Number of pages4
JournalCIRP Annals - Manufacturing Technology
Volume64
Issue number1
DOIs
StatePublished - Jan 1 2015

Keywords

  • Blasting Erosion Arc Machining (BEAM)
  • Electrode polarity
  • Flushing
  • Hydrodynamic arc-breaking mechanism
  • Machining performance

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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