Title: Mapping the material removal behaviour of micro deep hole drilling EDM process

Authors: R. Balasubramaniam; Prabhat Ranjan; V.K. Suri

Addresses: Precision Engineering Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085, India. ' Precision Engineering Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085, India. ' Precision Engineering Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085, India

Abstract: Electrical discharge machining (EDM) is dominated by the random behaviour of the sparking process and the secondary erosion and these create difficulties in the process control. Owing to very small spark gap, these problems get aggravated in micro EDM process and they become further complex in micro deep hole drilling EDM. To have better understanding of the material removal behaviour of micro deep hole drilling EDM, an experimental study was carried out and the effects of the factors like hold time, return time, sensitivity, capacitance and depth of hole were investigated. The result indicates that initially the material removal rate is predictable and latter due to randomness of the process, it becomes unstable and unpredictable.

Keywords: micro deep holes; micro EDM; secondary erosion; debris removal; material removal rate; MRR; geometrical modelling; threshold depth; hole drilling; electrical discharge machining; electro-discharge machining.

DOI: 10.1504/IJMMS.2012.049976

International Journal of Mechatronics and Manufacturing Systems, 2012 Vol.5 No.5/6, pp.516 - 527

Received: 16 Nov 2011
Accepted: 05 Apr 2012
Published online: 21 Aug 2014 *

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