Investigation of the effects of machining parameters on hole quality in drilling mild steel AISI 1045

Abstract

The current study shows the effect of machining parameters such as feed rate and spindle speed on the hole quality such as hole size, circularity and surface roughness in drilling AISI 1045. The experiments were performed using high speed steel drill bits. The result indicated that hole size decreases with increasing feed rate and increases with increasing spindle speed. However, circularity decreases with increasing both feed rate and spindle speed. Furthermore, surface roughness increases with increasing feed rate and decreases with increasing spindle speed. Moreover, Analysis of variance deals that feed rate has higher influence on hole size with percentage contribution of 59.16% than spindle speed of 38.37 % on hole size. The percentage contribution of feed rate is greater than spindle speed on circularity 72.40 % and 25.57% respectively. Moreover, the percentage contribution of feed rate on surface roughness is 61.89% greater than spindle speed of 37.14 %.