Open AccessAnalysis of specific cutting energy in laser fusion cutting of an aluminium alloy
Author(s) -
Miloš Madić,
Margareta Coteaţă,
Predrag Janković,
Milan Trifunović
Publication year - 2022
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1235/1/012015
Subject(s) - laser cutting , specific energy , surface roughness , materials science , aluminium , plasma cutting , energy (signal processing) , laser power scaling , aluminium alloy , laser , fusion , surface finish , mechanical engineering , metallurgy , composite material , optics , engineering , mathematics , statistics , physics , linguistics , philosophy , quantum mechanics
Laser cutting is a non-contact, non-conventional method for contour cutting which is characterized by several process performances. The present paper aims to analyze the specific cutting energy in CO 2 laser cutting of an aluminium alloy using nitrogen as an assist gas. An experimental investigation, based on the use of central composite design, was conducted to define mathematical models for the prediction of the kerf width, surface roughness, and specific cutting energy. Thus, an analysis of the effects of the laser power, cutting speed, and nitrogen pressure on the specific cutting energy is enabled. Moreover, the analysis of experimental data included the correlation between the specific cutting energy and surface roughness. Pareto optimization, considering specific cutting energy and surface roughness, was conducted to propose alternative laser cutting conditions concerning conflicting criteria.