Experimental modal analysis and vibration monitoring of cutting tool support structure

The objective of this research is to determine how a cutting tool vibrates when chatter occurs and how this motion is related to the acoustic emission signal. Modal analysis impact tests were conducted to obtain the actual natural frequencies and mode shapes of the Cutting Tool Support Structure (CTSS) system. Cutting tests were also conducted to determine the phase relationship between feed and cutting direction accelerations. Acoustic emission tests were performed to determine the relation between AE signals and two accelerations. Bursts of AE signal were observed to occur approximately at the direction turning points of the Lissajous loop.