黏弹性支承阻尼器抑制机床低频残余振动的研究
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摘要
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.
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.
引文
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[2]刘杨,张宇,钱海盛,等.振动时效消除大型机床床身残余应力的研究[J].热加工工艺,2016,45(10):225-228.
[3]王富强,芮执元,雷春丽,等.基于元结构的精密机床床身结构动态分析和优化[J].机械设计,2012,29(5):93-96.
[4]魏新,郭润兰,黄华,等.考虑结合部影响的卧式斜床身车床的动力学特性分析及优化[J].机械强度,2014,36(6):975-980.
[5]刘鹏.锻压工艺对高精度机床用镁合金阻尼性能的影响[J].热加工工艺,2017,46(5):139-142.
[6]孙峨,蒋书运,马青芬.高速立式加工中心结构动态设计[J].制造技术与机床,2010(6):79-82.
[7]刘成颖,谭锋,王立平,等.面向机床整机动态性能的立柱结构优化设计研究[J].机械工程学报,2016,52(3):161-168.
[8]黄贤振,许乙川,张义民,等.车削加工颤振稳定性可靠度蒙特卡罗法仿真[J].振动测试与诊断,2016,36(3):484-487,603.
[9]杨毅青,刘强,王民.面向车削颤振抑制的多重阻尼器优化设计[J].振动工程学报,2010,23(4):468-474.