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

Abstract

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.

Equivalent linearization of hyperelastic rubber rings in dynamic vibration absorber boring bar and simulation of its dynamic properties

“…Lu et al [31,32] presented a novel non-contact magnetostrictive actuator combined with a fiber optic displacement sensor for active damping of the boring bar, demonstrating a significant increase in the dynamic stiffness of the boring bar. Asier Astarloa [33] introduced the development of a modular active inertial damper based on magnetostriction for suppressing chatter in slender boring bars. Tang et al [34] proposed a new method using piezoelectric patches to suppress vibration and chatter in the boring bar.…”