基于proe剃齿刀齿廓修形样条方法优化研究

eeI基于proe剃齿刀齿廓修形样条方法优化研究作者：ee(ee)指导教师：ee[摘要]：剃齿加工作为齿轮精加工的方法之一，因其效率高、成本低而被广泛的应用于齿轮制造领域。然而用标准渐开线齿形剃齿刀剃齿后，在工件齿形节点附近会出现不同程度的“中凹”现象。这样剃后齿形不仅影响齿轮的传动精度，而且会增大传动噪声，缩短齿轮的使用寿命。虽然现阶段对于剃齿机理的研究有了突破性进展，但由于剃齿过程的复杂性，仍然没有给出误差产生的主要因素与误差量之间的定量解释。因此必须对剃齿中凹机理进行深入研究，并找到更有效的方法和措施来解决这一问题。本论文基于目前剃齿修形的现状以及发展趋势做了以下研究工作：１．以传统剃齿加工原理为基础，分析并总结了国内外剃齿工艺研究领域的主要成果，阐述了造成中凹误差的主要原因，以及目前解决中凹误差的主要措施。2．在PRO/E平台上，对剃齿刀及齿轮实现了三维参数化实体造型并对它们进行了啮合装配；提出了渐开线齿廓以样条曲线表示，并参数化了此样条曲线，以达到对渐开线齿廓的自由修改。3．基于ANSYS对剃齿刀／齿轮的无侧隙啮合加工过程进行了接触仿真分析，得出了沿齿廓曲线上的接触压力分布结果。4.在ANSYS环境的DESIGNXPIDRER模块下，以尽量满足整个齿廓曲线等接触压力为目标，对剃齿刀／齿轮啮合的最大接触压力进行了基于实验设计的技术优化，从而修形了齿廓曲线。[关键词]：剃齿刀，样条，参数化，接触分析，实验设计ModelingStudytoToothSurfaceModificationofShavingCutterCandidate:ee（ee）Tutor:eeAbstract:Gearshavingisoneofgearfinishingoperations,whichiswidelyusedforgear-makingfactoriesbecauseofitshighefficiencyandlowcost.Howeveraftershavedbyshavingcutterwithtrueinvoluteprofiles,therearethe“mid-concave”phenomenaonthepitchpointsofshavedgeartoothprofileinevitably,gearshavedlikethiswillnotonlyinfluencegearstransmissionaccuracy,butalsogeneratemuchmorenoisewhilerunning,andshortengreatlytheoperatinglifeofthegear.Atpresent,althoughmuchhasbeenachievedontheresearchofmechanicsofshavingprocess,thereisnotmuchquantitativedescriptionabouttheweighofeacherror-generatingfactortothegenerationofmid-concaveerrorduetothecomplexityofshavingprocess.soitisnecessarytostudytheshavingprincipleandtakeeffectivemeasurementstosolveit.thedissertationmakesstudiesontoothsurfacemodificationofshavingcutterbasedonpresentstateandtrendofdevelopmentareasfollows:1Basedonconventionalshavingtheorythepapersystematicallyanalysisandsummarizeshavingprocessprimeachievementsofdomesticandforeign,andexpoundmainfactsleadingtomid-concaveerrorsmainmethodstosolvemid-concaveerrorsatpresent.2Haveimplementedthree-dimessionalparameterizationentitymodelingofshavingcutterandgearbasedonPro/E.putforwardinvoluteprofileisexpressedbysplinewhichcanbeparameterized.inthewayinvoluteprofilecanbemodifiedoptionally.ee3BasedonANSYSexecutecontactsimulationanalysisofno-backlashengagementprocessbetweenshavingcutterandgear,andobtaindistributioncureofcontactpressurealongthetoothprofilecurve.4BasedondesignxplorermoduleinANSYSenvironment,takecontactpressurewhilemostprobableletentiretoothprofilecurvepressuretodistributeequalobject,executemaximumcontactondesignofexperiment,andmodifytoothprofilecurve.Keywords:shavingcutter,spline,parameterization,contactanalysis,designofexperiment目录1绪论...........................................................................................................11.1剃齿加工概述..............................................................................................11.1.1剃齿加工原理.....................................................................................11.1.2剃齿产生中凹误差的原因....................................................................21.1.3影响齿形中凹误差的主要因素.............................................................31.1.4目前对减小或消除齿形中凹误差的措施...............................................41.2样条曲线概述..............................................................................................51.3本课题的提出及研究内容.............................................................................61.3.1课题提出的依据.................................................................................61.3.2课题的研究方法及主要内容................................................................72三维实体造型及有限元法.........................................错误!未定义书签。2.1实体造型.....................................................................错误!未定义书签。2.1.1基于特征的参数化实体造型................................错误!未定义书签。2.1.2Pro/ENGINEER简介............................................错误!未定义书签。2.2有限元法.....................................................................错误!未定义书签。2.2.1关于接触分析.....................................................错误!未定义书签。2.2.2ANSYSWorkbench简介.........................................错误!未定义书签。2.3技术路线及选用ANSYS原因..........................................错误!未定义书签。2.3.1技术路线的最初构想..........................................错误!未定义书签。2.3.2选用ANSYSWorkbench的原因.............................错误!未定义书签。ee3剃齿刀及齿轮参数化实体建模..................................错误!未定义书签。3.1三维参数化绘图...........................................................错误!未定义书签。3.2渐开线齿廓方程的建立.................................................错误!未定义书签。3.3剃齿刀参数化实体造型.................................................错误!未定义书签。3.3.1剃齿刀的选定及参数计算....................................错误!未定义书签。3.3.2剃齿刀齿廓渐开线转化为样条曲线表示...............错误!未定义书签。4剃齿刀的实体造型.....................................................错误!未定义书签。4.1创建齿廓基准点...........................................................错误!未定义书签。4.2建立基体并创建单个轮齿.............................................错误!未定义书签。4.2.1创建容屑槽及退刀孔..........................................错误!未定义书签。4.2.2生成剃齿刀模型.................................................错误!未定义书签。4.3齿轮参数化造型...........................................................错误!未定义书签。4.3.1齿轮的选定及参数计算.......................................错误!未定义书签。4.3.2齿轮的实体造型.................................................错误!未定义书签