Controllable Damping Boring Tool Based on Magnetorheological Elastomer

Abstract

To address the prevalent issue of vibrations in long boring tools with a significant length-to-diameter ratio, we have developed a novel controllable damping boring tool. This innovative tool leverages the unique properties of magnetorheological elastomers (MREs) to counteract vibrations effectively. Using ANSYS software, we analyzed the magnetic field within the tool, revealing a direct link between excitation current and magnetic induction intensity within the MRE. Concurrently, experiments confirmed a strong correlation between magnetic induction and the MRE's elastic modulus, highlighting the material's tunable stiffness under varying magnetic fields. Further investigation through modal and harmonic response analyses has unveiled that augmenting the MRE's elastic modulus achieves two objectives. First, it raises the natural frequency of the boring tool. Second, and perhaps more importantly, it significantly diminishes the tool's response amplitude to vibrations. To illustrate, at an excitation current of 0 A, our measurements recorded a response amplitude of 0.31504 mm for the controllable damping boring tool. Furthermore, when the excitation current was increased to 1 A, the response amplitude was notably reduced to 0.1523 mm. These compelling results highlight the MRE controllable damping boring tool's exceptional dynamic adjustment capabilities and its remarkable efficacy in vibration suppression.