Influence of Drill Dynamics on Bore Quality

Reaming, in addition to drilling processes, is necessary for many applications in order to achieve the quality standards demanded. The main reason why progress in precision drilling is hampered lies in the incomplete understanding of the drill dynamics. This article describes the dynamic influences of a carbide tool on the bore quality. In contrast to most of the existing investigations which are based on theoretical models that include only some influencing factors, this article presents an experimental methodology to determine the bore quality out of the frequency response. The results show strong correlation between the shape accuracy and the frequency response.