Investigation of the inerter-based dynamic vibration absorber for machining chatter suppression

Hakan Dogan,David J Wagg,Neil D Sims

doi:10.1088/1742-6596/1264/1/012030

Hakan Dogan, David J Wagg + Show 1 more

Open Access

https://doi.org/10.1088/1742-6596/1264/1/012030

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Abstract

This study proposes a novel approach to increase the chatter stability in machining operations. It shows the potential performance improvement when an inerter-based dynamic vibration absorber is employed in a machining operation. Tuned inerter based devices have been employed to decrease the magnitude of the vibrations in applications such as civil engineering structures and vehicle suspension systems but the nature of chatter in machining is different from these applications. Therefore, it requires a different tuning methodology to obtain the optimal design parameters. In this study, the machining operation is modelled as an undamped single degree of freedom system and different configurations of an inerter, a damper and two springs are used to ensure a stable region of operation. Strategies for the tuning parameters are developed both analytically and numerically. Using these techniques the performance improvement in the chatter stability provided by using inerter based devices instead of a traditional dynamic vibration absorber is demonstrated.

Highlights

Regenerative chatter can be seen as one of the biggest issues in machining processes, and can be defined as undesired vibrations between the workpiece and cutting tool
The optimal parameters were obtained from the numerical optimisation method for the four configurations and Sims’ methodology for the traditional dynamic vibration absorber
The results show that the best performance is obtained by configuration C1 with the parameters which were found by the numerical optimisation method

Summary

Introduction

Regenerative chatter can be seen as one of the biggest issues in machining processes, and can be defined as undesired vibrations between the workpiece and cutting tool. It causes poor surface finish and reduces productivity. Moradi et al [2] presented chatter stability improvement by investigating the position of a tunable vibration absorber along a boring bar in a turning operation. More sophisticated designs such as nonlinear, two-degree-of-freedom and multiple tuned mass dampers have been proposed to suppress chatter vibrations [3,4,5,6]. Active vibration absorbers tend to offer more performance improvement, they are more complex, expensive and difficult to implement than passive vibration absorbers

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