Experimental analysis of the tool-to-workpiece vibrations transmission during chatter development in milling processes

摘要

An experimental work to analyze the mechanical vibrations that arise during chatter development in milling processes was conducted. The tool vibrations and the frequencies that are excited at the workpiece due to the tool impacts were studied for various levels of chatter. Tool vibrations were measured with an inductive sensor, while the workpiece vibrations were measured with an accelerometer. The relevance of the different vibrations measurement types, named acceleration, velocity and displacement, were investigated in relation to the information that each variable offers for chatter analysis. Experimental results showed that tool and workpiece frequencies are well localized in the frequency spectra. Velocity measurements reported tool and workpiece vibrations adequately, and this variable is a good indicator of chatter development.