Parametric assessment of surface behavior and the impact of heat in micro drilling of fiber laser machined AISI h13

Abstract

H13 is a tool steel with good strength to thermal cracking, and resistance to wear, and erosion. It is extensively employed in the manufacture of molds and dies. Because of its hardness, it is challenging to manufacture with traditional methods, and damages the surface during cutting, which lessens the effectiveness of components. Recently, laser cutting has become a possible method for achieving high rates of material removal. The use of laser cutting to manufacture complicated forms is a contemporary development in laser technique. The drilling on 0.44 mm thick H13 by 100 m fiber laser rays is highlighted in this study. Entropy using COPRAS is employed to optimize fiber laser settings for the drilled hole. Response surface analysis is utilized to determine correlation of fiber lasers process parameter and ANOVA validates the model. Further, ANN is used to predict the experimental results. In the current research, the laser’s output power, scanning speed, and duty cycle are all taken into account. The results of the tests revealed that laser power is the most important element affecting the quality of drilled holes. The optimum condition of COPRAS grade offers 4.27 µm of roughness, 89.89 µm of heat impacted zone, 139.595 µm of overcut, and 0.074113 mm of material removal rate. The observed and predicted figures are relatively near to each other, according to the experiments. The outcomes of the confirmation test (PO = 5 W, SOS = 10 mm/s, DC = 25%) demonstrate that optimal conditions provide greater surface precision than initial trails.