Title: Laser micro-drilling of alumina: parametric modelling and sensitivity analysis

Authors: Arunanshu S. Kuar; Bappa Acherjee; Souren Mitra

Addresses: Department of Production Engineering, Jadavpur University, Jadavpur, Kolkata 700032, India. ' Department of Production Engineering, Jadavpur University, Jadavpur, Kolkata 700032, India. ' Department of Production Engineering, Jadavpur University, Jadavpur, Kolkata 700032, India

Abstract: In the present research, laser micro-drilling of alumina has been investigated experimentally. The laser used is Nd:YAG, having a wavelength of 1.06 µm. The process parameters investigated are: lamp current, pulse frequency, air pressure and pulse width. The quality of micro-holes is evaluated by measuring the hole taper and HAZ width. Response surface methodology is adopted to perform the experimental design and also to develop the mathematical relationships relating the input process parameters and output qualities. The adequacy of the models is tested by statistical measures. Finally, the developed mathematical models are used for sensitivity analysis to identify the critical parameters and their tendencies.

Keywords: laser microdrilling; response surface methodology; RSM; sensitivity analysis; alumina microdrilling; hole drilling; micromachining; hole quality; lamp current; pulse frequency; air pressure; pulse width; microholes; mathematical modelling.

DOI: 10.1504/IJMMS.2012.048236

International Journal of Mechatronics and Manufacturing Systems, 2012 Vol.5 No.3/4, pp.294 - 307

Received: 01 Apr 2011
Accepted: 06 Dec 2011
Published online: 21 Aug 2014 *

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