Modeling and identification of tool holder–spindle interface dynamics
Modeling and identification of tool holder–spindle interface dynamics
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DOI：
10.1016/j.ijmachtools.2006.08.003
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发表时间：
2007-07
影响因子：
14
通讯作者：
M. Namazi;Y. Altintas;Taro Abe;N. Rajapakse
中科院分区：
文献类型：
--
作者：
M. Namazi;Y. Altintas;Taro Abe;N. Rajapakse
高速铣削中的大部分颤振源自刀架与主轴以及刀具与刀架接口处的柔性连接。本文介绍了刀架和主轴界面处的接触刚度和阻尼建模。刀柄-主轴锥度接触由均匀分布的平移和旋转弹簧建模。通过最小化主轴组件的实验测量和估计频率响应之间的误差来识别弹簧。本文还介绍了主轴与刀柄接口的动态响应的识别，以及它与刀柄-刀具伸出部分的接收耦合（由 Timoshenko 梁单元建模）。所提出的方法允许通过刀具和刀柄与主轴的接收耦合来预测刀尖处的频率响应函数，以及通过去除刀柄和主轴之间的离散接触弹簧来分析接触处相对磨损的影响。通过实验说明了这些技术，并详细阐述了它们在高速铣削应用中的实际用途。
The majority of the chatter vibrations in high-speed milling originate due to flexible connections at the tool holder–spindle, and tool–tool holder interfaces. This article presents modeling of contact stiffness and damping at the tool holder and spindle interface. The holder–spindle taper contact is modeled by uniformly distributed translational and rotational springs. The springs are identified by minimizing the error between the experimentally measured and estimated frequency response of the spindle assembly. The paper also presents identification of the spindle's dynamic response with a holder interface, and its receptance coupling with the holder–tool stick out which is modeled by Timoshenko beam elements. The proposed methods allow prediction of frequency-response functions at the tool tip by receptance coupling of tools and holders to the spindle, as well as analyzing the influence of relative wear at the contact by removing discrete contact springs between the holder and spindle. The techniques are experimentally illustrated and their practical use in high speed milling applications is elaborated.