黏弹性支承阻尼器抑制机床低频残余振动的研究

Research of Viscoelastic Damper Support for Reduction in Low Frequency Residual Vibration in Machine Tools

为减少机床加工过程中轴向运动引起的低频残余振动,提出一种新型黏弹性支承阻尼系统。利用黏弹性四元模型对该阻尼系统进行建模,结合时域迭代计算方法定量估计机床系统阻尼性能。实验结果表明通过安装阻尼器可以减弱系统残余振动,减少机床稳定所需时间;另外,当机床底部可安装阻尼面积增大时,对于减少机床残余振动更加有效。

In order to reduce the low frequency residual vibration caused by axial motion and machine tool vibration, a new viscoelastic support damping system is proposed. The viscoelastic four element model is used to model the damping system, and the corresponding parameters of the model are calculated by the time domain iterative calculation method to estimate the damping performance quantitatively. The experimental results shown that, the damper model can quantitatively estimate the damping behavior and effectively reduce the residual vibration of the machine tool. In addition, when the damping area increases at the bottom of the machine tool, it is more effective to reduce the residual vibration of the machine tool.