Reluctance-Based Modular Active Damper for Chatter Suppression in Boring Bars With Different Overhangs

Boring operations are usually limited by chatter vibrations related to the flexibility of boring bars. The location of a passive tuned mass damper close to the tool tip is a widely proposed solution, which has demonstrated robust results. However, the main drawback of this solution is that the dampers must be tuned for a certain frequency, being a customized solution for each boring bar. Active devices can overcome this limitation due to their adaptability to changing actuation frequencies. This work describes the development of a reluctance-based modular active inertial damper for its application in the suppression of chatter vibrations in slender boring bars. The solution provides the possibility to perform chatter-free boring operations at different bar overhangs due to the important stability improvement obtained in a broad frequency range.

Automated summary

Boring operations are often limited by chatter vibrations caused by the flexibility of boring bars. Passive tuned mass dampers near the tool tip have been proposed as a solution, but they need to be tuned for a specific frequency for each bar. This work presents the development of an active inertial damper based on reluctance, which offers stability improvement over a broad frequency range, enabling chatter-free boring operations at different bar overhangs.