Title: Modelling and analysis on machining characteristics during pulsed Nd:YAG laser microgrooving of aluminium titanate (Al₂TiO₅)

Authors: B. Doloi, D. Dhupal, B. Bhattacharyya

Addresses: Production Engineering Department, Jadavpur University, Kolkata 700 032, India. ' Production Engineering Department, Jadavpur University, Kolkata 700 032, India. ' Production Engineering Department, Jadavpur University, Kolkata 700 032, India

Abstract: Pulsed Nd:YAG laser beam is widely applied in micro-machining with different micro-scale geometries on engineering materials such as ceramics, composites, and diamond. The present research papers deals with the Response Surface Methodology (RSM) based mathematical modelling and analysis on machining characteristics of pulsed Nd:YAG laser during micro-grooving operation on flat surface of aluminium titanate. An attempt has been made to optimise laser parametric setting for achieving accurate taper angles of micro-grooves. Based on the modelling and parametric optimisation analysis, the optimal laser process parametric setting has been obtained as air pressure of 0.9 kg/cm², lamp current of 20.4 amp, pulse frequency of 2.8 kHz, pulse width of 2.7% of duty cycle and cutting speed 10 mm/s for achieving the optimum taper angle of 11.1°.

Keywords: pulsed Nd:YAG lasers; microgrooving; aluminium titanate; micromachining; response surface methodology; RSM; mathematical modelling; taper angles.

DOI: 10.1504/IJMTM.2010.034284

International Journal of Manufacturing Technology and Management, 2010 Vol.21 No.1/2, pp.30 - 41

Published online: 31 Jul 2010 *

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