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数控车床主轴参数化建模及频域分析论文[带图纸].doc

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数控车床主轴参数化建模及频域分析论文[带图纸].doc

西安文理学院机械电子工程系本科毕业设计(论文)题目数控车床主轴参数化建模及频域分析专业班级08机械2班学号08102080209学生姓名陈建伟指导教师刘凌设计所在单位西安文理学院数控车床主轴参数化建模及频域分析摘要本毕业设计是对CKA6140数控车床主轴进行参数化建模及频域分析,将现代化的设计方法应用于机床的设计,以数控系统设计方案的拟定为主线,通过对数控车床主轴伺服系统机械部分进行参数化设计,理论强度基础计算及其关键零件的校核,对车床进给伺服系统进行数学建模,然后使用ANSYS软件进行频域仿真,简要论述了频域方法和动力学分析的基本求解过程,建立机床主轴频域模型,合理的确定了载荷、轴承支承刚度和约束条件,选定了单元类型。采用Lanczos法对其进行自由模的具体研究内容,总结了机床、动态设计方法研究和机床主轴动静态研究的发展状况和发展趋势,在总结前人研究成果的基础上,结合当前的技术发展趋势,采用频域方法来进行研究,简要论述了模态分析,得到主轴的固有频率和振型,找出工作时容易发生共振的频率域,为进一步提高精度和转速提供理论依据。通过毕业设计进行了机电结合的全方面训练,从而培养设计计算的能力以及分析和处理生产过程中所遇到的问题的综合能力。关键词频域分析模态分析机床主轴振动FrequencyDomainAnalysisandParametricModelingofCNCLatheSpindleAbstractThisgraduationprojectistheCKA6140lathespindlemachineparametricmodelingandfrequencydomainanalysis,themainlinetotheformulationofthenumericalcontrolsystemdesign,Parametricdesign,CNClathespindlemachinefeedthemechanicalpartoftheservosystemandthecheckingofthetheoreticalstrengthcalculatedonthebasisofavailability,latheintothemathematicalmodelingoftheservosystem,andthenusetheANSYSsoftwareforfrequencydomainsimulation.Inthepaper,thedevelopmenttrendsofmachinetoolanddynamicdesignaresummarized.AndtheFEAmethodsaretakentouse.Thebasicresolvingprocessesaboutthemodalparametersidentifiertheory.Thebasicresolvingprocessesaboutstaticanalysisandkineticanalysis.Thesolidmodelofspindleisestablished.Duringthebuildingofthemodel,theloadonthespindle,thesupportingstiffnessofbearing,theboundaryandelementsareanalyzedcorrectly.ThemodalfrequencyandmodalshapecharacteristicsareobtainedbyFEMmodalanalysiswiththeLanczosmethod.Andthefrequencyregionoftheresonanceinworkisobtained.Graduatedesigntraininginallaspectsofmechanicalandelectricalintegration,inordertocultivatetheabilitytodesigncalculationsandtheproblemsencounteredintheproductionprocessoftheanalysisandprocessingcapabilities.KeywordsFiniteElementMethodModalAnalysisSpindlevibration目录1目录1绪论......................................................................................................................................11.1课题研究的背景及意义.............................................................................................11.2数控机床主轴国内外研究现状.................................................................................11.3本课题的研究内容.....................................................................................................22总体设计方案........................................................................................................................42.1设计要求.....................................................................................................................42.2设计参数.....................................................................................................................52.3总体设计方案图.........................................................................................................53数控系统选择........................................................................................................................63.1简介西门子802S数控系统......................................................................................63.2802S数控系统的组成...............................................................................................63.3数控机床伺服系统的选择.........................................................................................74主轴计算及校核....................................................................................................................84.1主轴设计.....................................................................................................................84.1.1电动机的选择..................................................................................................84.1.2带传动设计......................................................................................................84.2主轴的校核...............................................................................................................104.2.1传动组齿轮模数的确定和校核....................................................................104.2.2齿轮强度校核................................................................................................114.2.3主轴挠度的校核............................................................................................124.2.4主轴弯曲变形的校核....................................................................................134.2.5主轴扭转变形校核.........................................................................................134.3主轴最佳跨距的确定...............................................................................................144.3.1选择轴颈直径,轴承型号和最佳跨距............................................................144.3.2求轴承刚度.....................................................................................................144.4主轴支承处轴承的选择...........................................................................................154.5主轴图.......................................................................................................................165参数化建模..........................................................................................................................175.1理论基础....................................................................................................................175.1.1主轴的动力学模型........................................................................................175.2建立目标函数...........................................................................................................185.3约束条件....................................................................................................................195.3.1刚度约束........................................................................................................195.3.2强度约束........................................................................................................195.3.3转角的限制....................................................................................................205.3.4扭转变形的限制............................................................................................205.3.5切削力的限制................................................................................................206数控车床主轴的频域分析..................................................................................................216.1频域简介及ANSYS软件应用................................................................................216.1.1频域概述........................................................................................................216.1.2ANSYS软件应用...........................................................................................22目录26.2机床主轴频域分析模型...........................................................................................226.2.1构建几何模型................................................................................................226.2.2频域模型建立................................................................................................226.2.3单元类型选择和网格划分............................................................................236.3机床主轴振动模态分析...........................................................................................256.3.1ANSYS动力分析...........................................................................................256.3.2模态分析........................................................................................................25结论..........................................................................................................................................30致谢..........................................................................................................................................31参考文献..................................................................................................................................32附录..........................................................................................................................................33

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