Parameter optimisation in laser cutting of aluminium alloy sheet Online publication date: Thu, 21-Aug-2014
by Avanish Kumar Dubey; Gavendra Norkey; Sanat Agrawal
International Journal of Mechatronics and Manufacturing Systems (IJMMS), Vol. 5, No. 3/4, 2012
Abstract: Being a thermal energy-based advanced cutting process, the capability of laser beam cutting depends mainly on optical and thermal properties of materials to be cut rather than mechanical properties. Highly reflective and thermally conductive sheetmetals are known as difficult-to-laser-cut materials. This paper presents an experimental approach to investigate the optimum laser cutting parameters, which minimise the surface roughness during pulsed laser cutting of difficult-to-laser-cut aluminium alloy sheet. Robust parameter design has been used for deciding the optimal parameter levels for straight cut profiles. An empirical model for surface roughness has also been developed. On the basis of optimisation results, it has been found that the optimal parameter level suggested give minimum surface roughness in present operating conditions. The results have also been verified by running some confirmation tests.
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