LASSER CUTTING PROCESS – INFLUENCE OF ASSITING GAS PRESSURE ON SURFACE ROUGHNESS AT MILD STEEL CUTTING

Abstract

The paper presents the optimization of assisting gas pressure for a Laser Cutting System Mazak Super Turbo-X 48 MkII. The study was made using 3mm, 6mm and 10mm mild Steel. The laser parameters: feed rate v, power P, frequency F and efficiency R were maintained constant while the gas pressure p was varied and the roughness Rz was measured according to DIN EN ISO 9013. Was analyze the influence of gas pressure on surface roughness to obtain a complex relationship of roughness Rz variation according to the gas pressure variation. The goal of experiment is to minimize the Rz and the gas pressure. The settings for input parameters were chosen based on the manufacturer and laser operators indication. For each thickness of material a mathematical model of roughness variation with the gas pressure was find. It was find that the surface roughness increases with increasing of gas pressure and material thickness.