Development of an empirical model of the spindle bearing damping in consideration of the assembly and operating condition for an application-oriented simulation of the dynamic behavior of main spindles

考虑装配和操作条件，开发主轴轴承阻尼经验模型，用于主轴动态行为的面向应用的模拟

• 批准号: 386986567
• 负责人: Professor Dr.-Ing. Christian Brecher
• 金额: --
• 依托单位: Schaeffler Technologies AG & Co. KG
• 依托单位国家: 德国
• 项目类别: Research Grants (Transfer Project)
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2020-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/386986567?language=en
• 关键词: Development; empirical; model; spindle; bearing

In fast-rotating main spindles of milling machines, spindle bearings are used almost exclusively because of their high speed capability, compact size and modest required peripherals. Due to their design as angular contact ball bearings, their static and dynamic behavior is highly dependent on the temperature, the speed and assembly conditions such as the preload. While the non-linear stiffness behavior can be calculated numerically with simulation programs, the damping behavior is difficult to predict due to the high complexity of the elastohydrodynamic and insufficiently known parameters such as the viscosity in the lubrication gap. The goal of this knowledge transfer project is to determine the damping parameters of selected spindle bearings depending on assembly and operating condition and to create an empirical model of the spindle bearing damping. The model development will be supported by using existing numerical computation programs of the bearing kinematics by correlating the empirically determined damping parameters with calculated parameters such as pressure in the ball contact. By implementing the model in the existing calculation programs, spindle and machine manufacturers as well as users are able to calculate the dynamic response of spindle systems to simulate dynamic compliances and machine-process interactions.

在铣床的快速旋转主轴中，几乎只使用主轴轴承，因为它们具有高速能力、紧凑的尺寸和所需的外围设备。由于其设计为角接触球轴承，其静态和动态行为高度依赖于温度、速度和预紧等装配条件。虽然可以使用模拟程序对非线性刚度行为进行数值计算，但由于弹流动力学的高度复杂性以及润滑间隙中的粘度等参数已知不足，因此阻尼行为很难预测。该知识转移项目的目标是根据装配和操作条件确定所选主轴轴承的阻尼参数，并创建主轴轴承阻尼的经验模型。通过将经验确定的阻尼参数与计算的参数（例如球接触中的压力）相关联，使用现有的轴承运动学数值计算程序来支持模型开发。通过在现有计算程序中实施该模型，主轴和机器制造商以及用户能够计算主轴系统的动态响应，以模拟动态合规性和机器过程交互。