Experimental Study of Fiber Laser Machining on C70600 material for kerf width and surface roughness

Abstract

For many years laser machining process is widely used for dismantling jobs. But relatively only few research work have been addressed on the effect of high power fiber laser machining process on non ferrous materials. Most of the work is reported on ferrous materials like mild and stainless steel. In the nuclear sector there are significant quantities of non ferrous thick material like Copper (C 70600) that needs to be cut using laser process. In this paper, C 70600 is considered as workpiece material. Process parameters that are chosen are laser power, cutting speed and assist gas pressure. C 70600 material plate of thickness 8mm is selected. For experiments workpiece size of 30cm X 30cm is kept constant throughout. Performance parameters are kerf width and surface roughness. Fiber laser machining of 6kW output power machine is used for the experimental study. The kerf width and surface roughness are the important parameters that depend upon change in laser power and cutting speed. Kerf width and surface roughness increases with increase in laser power and cutting speed. Assist gas pressure did not show major effect on output parameters. Further, the experimental results have been optimized using Design Expert software implementing Box Behnken design method.