Original scientific paper

https://doi.org/10.17559/TV-20160609171348

The Effect of Selected Technological Parameters of Laser Cutting on the Cut Surface Roughness

Jozef Meško ; Department of Technological Engineering, Faculty of Mechanical Engineering, University of Žilina, Univerzitná 1, 010 26 Žilina, Slovakia
Andrej Zrak ; Department of Technological Engineering, Faculty of Mechanical Engineering, University of Žilina, Univerzitná 1, 010 26 Žilina, Slovakia
Rastislav Nigrovič ; Department of Technological Engineering, Faculty of Mechanical Engineering, University of Žilina, Univerzitná 1, 010 26 Žilina, Slovakia
Ružica R. Nikolić orcid.org/0000-0003-3042-8916 ; Faculty of Engineering, University of Kragujevac, Sestre Janjic 6, 34000 Kragujevac, Serbia

Abstract

The theoretical part of the paper presents some basics of the laser cutting technology and principles. The characteristics of the CO2 laser beam and the parameters entering the laser cutting process are described. The conventionally used material – S235JR steel, method of its laser cutting and the effect of process technological parameters on the cut area characteristics are presented as well. Experimental investigations were performed on samples made of the S235JR steel, with application of different laser cutting technological parameters, while observing the surface roughness Rz and Ra. Roughness results are displayed as images of the scanned cutting surface geometry and graphically for each sample, with comparison between the individual test samples. Effects of the position of the laser beam focus point, the cutting speed and assist gas pressure on the cut surface roughness are analyzed. It was concluded that the laser cutting parameters impose significant influence on the cut surface quality.

Keywords

assist gas pressure; cut surface quality; cutting speed; laser beam focus point position; laser cutting

Hrčak ID:

204444

URI

https://hrcak.srce.hr/204444

Publication date:

20.8.2018.

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