Research on characteristics of drilling tool intergrating damping system using Experimental Modal Analysis – EMA

Abstract

In recent years, the control of tool vibration has emerged as a critical area of scientific development. This is because tool vibration creates sound-noise and unwanted quality surface. Mathematically, the observed tool vibration is a ratio of the force acting on the tool to its dynamic stiffness. Because the dynamic stiffness is proportional to the tool damping, the tool vibration could be controlled by enhancing the damping ability of the tooling system. In this paper, the drilling tool integrating damping system is tested with Experimental Modal Analysis (EMA). The natural frequencies, the damping ratios, and mode shapes are detected. Through modal analysis testing the new damped drilling tool shows better damping ratio than the conventional tool. These tools are expected to have better performance than the conventional drilling tools as well.