Integrated dynamic thermo-mechanical modeling of high speed spindles, part 1: Model development
Integrated dynamic thermo-mechanical modeling of high speed spindles, part 1: Model development
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DOI：
10.1115/1.1644545
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发表时间：
2004-02-01
影响因子：
4
通讯作者：
Shin, YC
中科院分区：
文献类型：
--
作者：
Li, HQ;Shin, YC
本文针对各种高速主轴提出了一个综合的热动力学集成模型。整个模型由三个完全耦合的子模型组成：轴承模型、主轴动力学模型和热模型。利用有限元方法，生成了一种新的热模型，它能够描述高速电主轴的复杂结构，并能预测更准确的温度分布。主轴动力学模型是基于铁木辛柯梁理论利用有限元构建的，并通过考虑剪切变形、材料和轴承阻尼以及主轴/刀柄接口进行了改进。利用新的热动力学模型，通过系统的耦合过程可以对更通用和详细的轴承配置进行建模。轴、外壳和轴承的热膨胀是根据预测的温度分布计算得出的，并用于根据运行条件更新轴承预紧力，而这些预紧力又被用于更新热模型。因此，该模型是完全集成的，可以针对所有设计参数和运行条件提供解决方案。
This paper presents a comprehensive integrated thermo-dynamic model for various high speed spindles. The entire model consists of fully coupled three sub-models: bearing, spindle dynamic and thermal models. Using a finite element approach, a new thermal model has been generated, which can describe complex structures of high-speed motorized spindles, and can predict more accurate temperature distributions. The spindle dynamic model is constructed using finite elements based on Timoshenko beam theory and has been improved by considering shear deformation, material and bearing damping, and the spindle/tool-holder interface. Using the new thermo-dynamic model, more general and detailed bearing configurations can be modeled through a systematic coupling procedure. The thermal expansions of the shaft, housing and bearings are calculated based on predicted temperature distributions and are used to update the bearing preloads depending on the operating conditions, which are again used to update the thermal model. Therefore, the model is fully integrated and can provide solutions in terms of all the design parameters and operating conditions.