【作者】 万海波；

【导师】 杨世锡；

【作者基本信息】 浙江大学 ， 机械制造及其自动化， 2011， 硕士

【摘要】 数控机床主轴系统作为数控加工装备的关键部件,其性能劣化直接影响产品的加工精度。主轴系统性能劣化和误差补偿研究对提高数控机床加工精度和可靠性具有重要的应用价值。本论文结合国家科技重大专项项目“数控机床故障预警诊断技术及基于功能部件的可重构监测诊断系统”(项目编号2009ZX04014-101-01),研究了主轴系统的动态特性,分析了性能劣化原因,构建了劣化分析和可靠性评估体系,开发了基于特征参数提取的可靠性监测系统,并针对主轴性能劣化产生的动态误差设计了在线检测系统和提出了动态误差软件补偿方法,并通过实验验证了该检测系统和补偿方法的有效性。论文的主要研究内容和相关章节安排如下：第一章论述了数控机床主轴系统性能劣化及补偿技术研究的重要意义,综述了机械系统性能劣化、主轴系统特性和补偿技术的研究现状,最后给出了本文主要研究内容和总体结构。第二章分析数控机床主轴系统结构,建立了主轴系统的动力学和仿真模型。通过仿真模型进行模态分析和谐响应分析,分析了主轴系统模态振型和不同激励力作用下的动态响应,为数控机床主轴系统特征参数提取和误差分析提供了理论依据。第三章分析了数控机床主轴系统性能劣化的原因,提出了一种自回归的数控机床主轴系统性能劣化建模方法,结合可靠性评估方法研究提出了一种数控机床主轴系统可靠性评估方法,在此基础上构建了主轴系统性能劣化可靠性分析体系第四章分析了可靠性监测系统的需求,设计了数控机床主轴系统性能劣化可靠性分析系统的总体框架,并开发了包含数据采集、状态监测、信号分析与特征参数提取、性能劣化分析、可靠性分析等五个模块的可靠性监测系统,测试验证了该系统的有效性、实时性和稳定性。第五章分析了主轴系统性能劣化后动态误差产生的原因,设计了动态误差的检测系统,提出了该误差的软件补偿方法,验证了在线检测系统和补偿方法的有效性。第六章回顾与总结本文的工作,展望了下一步工作。更多还原

【Abstract】 The spindle system of CNC machine tool, performed as the key component of the NC, the performance of which affects the machining accuracy directly. Researches on the mechanism of the performance deterioration and also the machining accuracy compensation are conducted, which are practically necessary and important.The research is founded by the Important National Science & Technology Specific Projects(no.2009ZX04014-101-01).In this paper,research on the performance deterioration mechanism of the spindle system is conducted with dynamic characteristics analysis.The reliability evaluation method is proposed based on the characteristic parameter monitoring.The reliability evaluation system is built up based on the state detection.The dynamic compensation is conducted with the analysis of those detected characteristic parameter, which is experimentally validated.Chapters of this paper are as follows:In Chapter l,the research status concerning the mechanical system performance deterioration, the spindle system properties and the dynamic compensation technology are introduced. The main contents of this paper are introduced generally.In chapter 2,the dynamic analysis of the spindle system is conducted using software ANSYS.The modal analysis and harmonic response analysis are conducted using the simulation model, through which, the dynamic characteristics of the spindle system are obtained.In chapter 3, the performance degradation modeling and the reliability evaluation method are analyzed in detail for the present spindle system.In chapter 4, the performance degradation monitoring system is developed, which functions through the analysis of those state parameters detected by the reliability evaluation system. The monitoring system is improved by the joint debugging of software and hardware systems.In chapter 5, the performance deterioration induced errors are compensated. The errors are detected online and compensated through by software. The online detecting system and dynamic compensation system are validated experimentally.In chapter 6, the research work are reviewed and summarized, the preliminary assumptions for future works are proposed.更多还原