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Local damping modeling for simulation and optimization of the dynamic behavior of machine tools

用于机床动态行为仿真和优化的局部阻尼建模

基本信息

批准号：
344540240
负责人：
Professor Dr.-Ing. Michael Friedrich Zäh
金额：
--
依托单位：
Lehrstuhl für Betriebswissenschaften und Montagetechnik
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 2019-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/344540240?language=en
关键词：
Local damping modeling simulation optimization

项目摘要

The performance and operating accuracy of machine tools is mainly determined by their dynamic behavior. Unbalanced dynamic properties of machine tools in interaction with process forces can result in unwanted vibrations whose consequences can be insufficient processing results, increased tool wear as well as damages to the machine tool. To avoid these effects while improving the performance of machine tools, a comprehensive optimization of the dynamic behavior is required in the development phase. Therefore, appropriate models for the various influencing factors are necessary. State of the art the mass- and stiffness properties can be simulated with sufficient accuracy, whereas often no appropriate models and parameters are available for the different damping effects in machine tools. In order to reduce this deficit, the research group "Damping effects in machine tools" is being funded by the German Research Foundation. Within the subproject "simulation of damping effects in the whole machine tool structure" at the Institute for Machine Tools and Industrial Management (iwb) a mechatronic basic structure of a machine tool was investigated and methods were developed to identify and to parametrize damping models for the various dissipation sources. Based on these results a modeling approach was developed to consider the various influencing factors, such as mass and stiffness properties, linear damping, friction, control and motion in the simulation and to predict their influences on the dynamic behavior with high accuracy. This opens up new possibilities for a comprehensive optimization of the dynamic behavior of machine tools. In this project, the achieved results and methods of the research group FOR 1087 are transferred to industry and used there to optimize the dynamic behavior of a machining center of the application partner. First, a mechatronic basic structure is investigated to transfer the methods for the identification of damping and friction models, for the consideration of variations and uncertainties in the simulation and for the modeling of the various influencing factors in a machine tool structure to industry. Based on the mechatronic structure the transition will be completed on the entire machine tool to identify and analyze further relevant dissipation sources. By using these insights and the results of the occurring uncertainties in the machine tool a comprehensive optimization considering the various influencing factors will be performed. The optimization is carried out with regard to the positioning accuracy and the dynamic compliance at the tool center point. The procedure includes the identification of optimization potential, the determination of improvement measures and the prototypical implementation and evaluation of the measures. From the obtained results, a generally applicable approach for a comprehensive optimization of the dynamic behavior of machine tools will be developed.

机床的动态特性是决定机床性能和工作精度的主要因素。与加工力相互作用的机床的不平衡动态特性可能导致不必要的振动，其后果可能是加工效果不佳、刀具磨损增加以及机床损坏。为了避免这些影响，同时提高机床的性能，在开发阶段需要对动态行为进行全面优化。因此，针对各种影响因素建立合适的模型是必要的。现有技术的质量和刚度特性可以以足够的精度进行模拟，而通常没有合适的模型和参数可用于机床中的不同阻尼效应。为了减少这一赤字，德国研究基金会资助了“机床阻尼效应”研究小组。在机床和工业管理研究所的子项目“整个机床结构中阻尼效应的模拟”中，研究了机床的机电一体化基本结构，并开发了识别和参数化各种耗散源的阻尼模型的方法。在此基础上，提出了一种考虑质量和刚度特性、线性阻尼、摩擦力、控制力和运动等影响因素的建模方法，并以较高的精度预测了这些因素对系统动态特性的影响。这为机床动态性能的全面优化开辟了新的可能性。在该项目中，FOR 1087研究小组的成果和方法被转移到工业中，并用于优化应用合作伙伴的加工中心的动态行为。首先，机电一体化的基本结构进行了研究，转移的阻尼和摩擦模型的识别方法，在模拟中的变化和不确定性的考虑，并在机床结构的各种影响因素的建模工业。基于机电一体化结构的过渡将在整个机床上完成，以识别和分析进一步相关的耗散源。通过使用这些见解和机床中发生的不确定性的结果，考虑到各种影响因素的综合优化将被执行。对刀具中心点的定位精度和动柔度进行了优化。该程序包括优化潜力的识别、改进措施的确定以及措施的原型实施和评估。从所获得的结果，一个普遍适用的方法，机床的动态性能的综合优化将开发。