Experimental Investigation on the Effect of Tuned Mass Damper on Mode Coupling Chatter in Turning Process of Thin-Walled Cylindrical Workpiece

Self-excited chatter is more likely to occur during the turning process of a thin-walled cylindrical workpiece because of low rigidity. Self-excited chatter is classified into regenerative chatter and mode coupling chatter. Compared with research on regenerative chatter, there is little research on the countermeasure against mode coupling chatter. The application of the tuned mass damper is well known for one of the passive damping techniques. Using the tuned mass damper can increase the critical width of cut at the onset of regenerative chatter. In the present work, the effect of the tuned mass dampers attached to the thin-walled cylindrical workpiece on mode coupling chatter generated in turning process is experimentally investigated. The proposed tuned mass damper is a cantilever beam form and is attached to the rotating workpiece with a double sided tape. Since it was confirmed that the vibration mode of mode coupling chatter had three antinodes, three tuned mass dampers were arranged at regular intervals in the circumferential direction of the cylindrical workpiece. As a result of conducting the turning tests using three tuned mass dampers, mode coupling chatter vibration totally controlled.