Asa毕业设计—精密数控车床进给系统设计及精度分析

四川大学本科毕业设计精密数控车床进给系统设计及精度分析I本科生毕业论文（设计）题目精密数控车床进给系统设计及精度分析学院制造科学与工程学院专业机械设计制造及其自动化专业学生姓名胡小林学号0743021249年级2007级指导教师樊庆文教务处制表二Ο一一年六月三日四川大学本科毕业设计精密数控车床进给系统设计及精度分析II精密数控车床进给系统及精度分析专业：机械设计制造及其自动化学生：胡小林指导教师：樊庆文摘要：伺服进给系统是数控机床的重要组成部分，对机床整体性能有着决定性的影响。越来越多的研究人员在进给伺服系统的研究中投入大量精力。研究设计进给系统的结构，并进行误差计算和精度分析，有利于深入了解进给系统的原理和设计方法，进而探求可能的优化设计。设计了以滚珠丝杠螺母副为核心元件的精密数控车床十字工作台进给系统。通过机床设计和精密机械设计理论，首先进行了进给系统的总体方案设计，选择合适的滚珠丝杠螺母副，并通过计算选择进给系统的其他相关元器件；其次对传动系统的刚度、惯量匹配等进行了校核验算；然后进行了滚珠丝杠螺母副传动系统的误差来源分析，计算了所设计系统的定位精度，证明计算得出的结果较好得满足了提出的设计要求。研究了进给系统的误差来源，叙述了现有的误差补偿技术，分析了其补偿原理，对比了不同补偿方法的优缺点；最后利用AutoCAD软件绘制了相关的零件图和装配图。论文系统研究了精密数控车床的进给系统，得出了一个较为合理的设计结果，并完成了其结构的图纸绘制，研究了各种因素对进给系统性能，特别是系统精度的影响，较为清晰地理解了进给系统的结构、设计方法和精度原理，达到了预期的目的。关键词：精密数控车床进给伺服系统滚珠丝杠螺母副精度分析四川大学本科毕业设计精密数控车床进给系统设计及精度分析IITheDesignandPrecisionAnalysisofCNCLathesFeedingSystemMajor：MachineDesignManufactureandAutomationUndergraduate：HuXiaoLinTutor：FanQingWenAbstract:ServosystemisanimportantpartofNCmachinetools,havingadecisiveinfluenceontheoverallperformanceofmachinetool.Moreandmoreresearchersdevoteagreatdealofenergyinthestudyofservosystem.Studyingondesignoffeedingsystemstructure,errorcalculationandprecisionanalysisarehelpfulforunderstandingthefeedsystemprincipleanddesignmethod,thenexploringpossibleoptimizationdesign.DesignedfeedingsystemofcoreprecisionCNClathecrossworkbenchwithballscrewnutpairofcomponents.Throughthemachinedesignandprecisionmechanicaldesigntheory,firsthavingtheoverallschemedesignofthefeedingsystem,selectedtheappropriateballscrewnutvice,andthroughthecomputationselectedfeedingsystemotherrelatedcomponents;Secondcheckedtheinertiamatchingofthetransmissionsystemsuchasthestiffness;analysiserrorsourcesofballscrewnutpairoftransmissionsystem,designedlocationaccuracyandrepositioningprecisionofthesystem,proofedthegoodresultcalculatedmeetingthedesignrequirementsoftheproposed.Studiedtheerrorsourcesoffeedsystem,andintroducedtheexistingerrorcompensationtechnology,analyzesitscompensationprinciple,comparedtheadvantagesanddisadvantagesofdifferentcompensationmethod;Finally,usingtheAutoCADsoftwarerenderingtherelatedpartsgraphandassemblydrawing.PaperstudiedprecisionCNClathesystemoffeedingsystem,obtainedareasonabledesignresults,andcompleteditsstructuredrawing,studyofthevariousfactorsonfeedingsystemproperties,especiallytheinfluenceofsystemprecision,relativelyclearlyunderstandthefeedingsystemstructure,thedesignmethodandaccuracyprinciple,achievedtheexpectedpurpose.Keywords:PrecisionCNClathesServoSystemBallscrewpairAccuracyAnalysis四川大学本科毕业设计精密数控车床进给系统设计及精度分析IV第1章绪论.....................................................................................................................................11.1数控机床概述.....................................................................................................................11.2伺服进给传动系统............................................................................................................21.2.1数控机床伺服进给系统的基本组成......................................................................31.2.2进给伺服系统的基本要求......................................................................................31.2.3进给伺服系统的设计要求......................................................................................4第2章机床精度要求和进给系统的总体设计.............................................................................52.1机床的主要性能参数........................................................................................................52.2进给系统的精度要求及主要工作参数.............................................................................62.3进给传动方案设计............................................................................................................72.4伺服方案设计....................................................................................................................8第3章Z轴（纵向）进给系统设计...............................................................................................93.1滚珠丝杠螺母副的选择与计算........................................................................................93.1.1主切削力的计算.....................................................................................................93.2.2滑板质量估计及摩擦力的确定...........................................................................103.1.3滚珠丝杠螺母副的静态设计[4].............................................................................103.2滚珠丝杠支承轴承的选择..............................................................................................143.3Z轴进给伺服电机的选择计算........................................................................................153.3.1扭矩计算................................................................................................................153.3.2功率计算................................................................................................................163.4联轴器的选择...................................................................................................................163.5导轨的选择计算...............................................................................................................173.6相关验算和校核........