一种机床固定结合部的动力学参数化建模方法  

Dynamic and parameterized modeling of fixed joints in machine tools using surface response method

作　　者：毛宽民[1,2] 黄小磊[1,2] 李斌[1] 田红亮[1] 

机构地区：[1]华中科技大学机械科学与工程学院,湖北武汉430074 [2]华中科技大学数字制造装备与技术国家重点实验室,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2012年第4期49-53,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50975104);国家科技重大专项基金资助项目(2009ZX04014-024);国家高技术研究发展计划资助项目(2009AA04Z149)

摘　　要：在全面分析机床固定结合部动力学特性的影响因素(结合面接触长、宽、粗糙度和预紧力)基础上,根据正交试验理论设计了结合面动力学特性实验试件.利用机床固定结合部动力学建模及其参数识别理论,识别各种工况下试件的动力学模型参数.在对结合面动力学模型参数深入分析的基础上,利用曲面响应法,建立了机床固定结合部动力学参数化数学统计模型.实验验证了该模型的有效性,为数控机床整机动力学精确建模提供了理论基础.Dynamic influence factors of joints, such as length, width, roughness, and preload were analyzed comprehensively. Experiment samples were designed based on the orthogonal theory. Using the dynamic modeling and parameter identification theory of fixed joints, dynamic model parameters of experimental specimens were identified under a variety of conditions. The dynamic model parameters were analyzed, based on the response surface methodology, and a dynamic parameters mathematic statistics model of fixed joints in machine tools was built. The validity of the model is verified by the experimental results, so that it provides a theoretical basis for accurate modeling in a dynamic model for the dynamics of NC （numerical control） machine tools.

关 键 词：机床 固定结合面 动力学建模 刚度影响因子 曲面响应法 

分 类 号：TG502[金属学及工艺—金属切削加工及机床]