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Background <p>During deep hole machining, the significant overhang of the boring bar leads to a drastic decrease in stiffness, resulting in severe vibration issues. This causes serious machining noise, reduced material removal rates, decreased tool life, and poor surface quality of the workpiece.</p> Purpose <p>In order to improve the vibration resistance of the boring bar, this paper proposes a vibration-damping boring bar with a particle damping vibration absorber.</p> Methods <p>Firstly, a dynamic model of the boring bar was established, and its modal characteristics were analyzed using the finite element method (FEM). The discrete element method (DEM) was then employed to develop a contact model for the damping particles, clarifying the energy dissipation mechanism. The influence of the absorber's structural design and damping particle parameters on energy dissipation characteristics were further analyzed using EDEM simulation software. Finally, modal testing and cutting experiments were conducted to measure the modal parameters and vibration signals of the boring bar with different particles. Comparative evaluations were made against a carbide boring bar, providing a holistic assessment of the effectiveness and applicability of particle damping.</p> Conclusion <p>The experimental results indicate that using YG6 tungsten carbide particles with a diameter of 0.5&#xa0;mm and a filling rate of 90% provides the optimal damping effect. Compared to conventional carbide boring bars, the damping boring bar showed a significant increase in damping ratio, along with improved cutting stability and surface quality.</p>

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Design and Energy Dissipation Analysis of a Boring Bar Based on Particle Damping

  • 期刊论文

  • 发表日期：

    2025年1月9日

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  • Jiyuan Tian,
  • Di Wu,
  • Junli Li,
  • Jing Shi,
  • Gang Liu

摘要

Background

During deep hole machining, the significant overhang of the boring bar leads to a drastic decrease in stiffness, resulting in severe vibration issues. This causes serious machining noise, reduced material removal rates, decreased tool life, and poor surface quality of the workpiece.

Purpose

In order to improve the vibration resistance of the boring bar, this paper proposes a vibration-damping boring bar with a particle damping vibration absorber.

Methods

Firstly, a dynamic model of the boring bar was established, and its modal characteristics were analyzed using the finite element method (FEM). The discrete element method (DEM) was then employed to develop a contact model for the damping particles, clarifying the energy dissipation mechanism. The influence of the absorber's structural design and damping particle parameters on energy dissipation characteristics were further analyzed using EDEM simulation software. Finally, modal testing and cutting experiments were conducted to measure the modal parameters and vibration signals of the boring bar with different particles. Comparative evaluations were made against a carbide boring bar, providing a holistic assessment of the effectiveness and applicability of particle damping.

Conclusion

The experimental results indicate that using YG6 tungsten carbide particles with a diameter of 0.5 mm and a filling rate of 90% provides the optimal damping effect. Compared to conventional carbide boring bars, the damping boring bar showed a significant increase in damping ratio, along with improved cutting stability and surface quality.