Study on influence of electrodes in electric discharge machining

Rajasekaran Thanigaivelan, Ramanathan Arunachalam, Nagamanaicker Natarajan

Research output: Contribution to journalArticle

Abstract

Electric Discharge Machining (EDM) is a prominent machining technique used mainly to machine difficult to cut metals and alloys. The major challenges faced in EDM are high Tool Wear Rate (TWR), overcut and poor surface quality. To overcome these challenges, this research aims to improve the TWR and overcut. The experiments were conducted on the EDM using Copper (Cu) electrode, Cryogenically Treated (CT) Cu electrode, Brass electrode and CT Brass electrode by changing the voltage, pulse on-time and discharge current values. Based on the conducted experiments CT Cu electrode, there is a significant improvement in TWR and overcut by 24 times and 2.5 times respectively compared to other electrodes. Further, the incidence of micro-cracks and void occurring in workpiece due to heating and cooling on the cutting surface is analysed through SEM analysis which substantiates that the CT tool produces the least number of cracks compared to other electrodes. Patents related to electrodes, issued since 1994 are selected for the survey. On comparing these patents, it is evident that the most of the patents aim to minimize the tool wear through various mechanisms.

Original languageEnglish
Pages (from-to)161-167
Number of pages7
JournalRecent Patents on Mechanical Engineering
Volume8
Issue number2
Publication statusPublished - Aug 1 2015

Fingerprint

Electric discharge machining
Electrodes
Wear of materials
Brass
Cracks
Surface properties
Machining
Experiments
Cooling
Copper
Heating
Scanning electron microscopy
Electric potential
Metals

Keywords

  • Cryogenic
  • EDM
  • Micro crack
  • Overcut
  • Tool
  • Tool wear rate

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Study on influence of electrodes in electric discharge machining. / Thanigaivelan, Rajasekaran; Arunachalam, Ramanathan; Natarajan, Nagamanaicker.

In: Recent Patents on Mechanical Engineering, Vol. 8, No. 2, 01.08.2015, p. 161-167.

Research output: Contribution to journalArticle

Thanigaivelan, Rajasekaran ; Arunachalam, Ramanathan ; Natarajan, Nagamanaicker. / Study on influence of electrodes in electric discharge machining. In: Recent Patents on Mechanical Engineering. 2015 ; Vol. 8, No. 2. pp. 161-167.
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