Analysis of laser cutting speed influence on surface quality and shape deviation of steel parts

The results of the laser cutting speed influence on the quality of machined surface, defined by the Ra roughness parameter and the shape errors, in the case of machining two types of steel: i) P265GH, ii) 1.4307 are presented in the paper. Two CO2 laser cutters with a maximum power of the laser beam 4000W and 3200W were used for the investigation. The characteristics of the Ra parameter depending on the laser cutting speed vc are presented. The diagrams of shape deviation of the machined specimens for the greatest and lowest values of the Ra roughness for the both laser cutters are presented. The deviation values from the theoretical profile of the particular samples, taking into account the type of the cut-out shape profiles (circular, linear) are calculated.