INFLUENCE OF THE PROCESS PARAMETERS AND THE MECHANICAL PROPERTIES OF ALUMINUM ALLOYS ON THE BURR HEIGHT AND THE SURFACE ROUGHNESS IN DRY DRILLING

摘要

In this paper, the effect of the mechanical properties of aluminum alloys, cutting speed, feed rate and the drill diameter on burr height and surface roughness of drilling holes were investigated, using the Taguchi method. Al-2024, Al-7075 and Al-7050 were selected as the workpiece materials for experiments. The analysis of variance and signal-to-noise ratio were employed to analyze the effect of the drilling parameters. The results of the statistical analysis indicated that feed rate and cutting speed minimize significantly both the height of the exit burrs and the surface roughness. Moreover, the mechanical properties of the workpieces are different influential factors on both responses.