Time Domain Stability Analysis for Machining Processes

In this paper, a time-domain simulation approach for stability analysis of machining processes is presented. Stability limits are detected by a new criterion. To ensure the reliability and the effectiveness of the proposed approach, the stability of the turning process is first studied, and then compared to the well-known semi analytical frequency-domain approach of Budak and Altintas, which gives exact stability predictions in this case. However, the proposed time-domain approach in milling process provides more conservative and realistic results in stability predictions. These results highlight the lack of precision of the classical frequency-domain approach for which several simplifying assumptions are made.