解放牌汽车变速叉工艺规程与夹具设计

吉林化工学院本科毕业设计说明书解放牌汽车变速叉工艺规程及夹具设计Theliberationoflicensingautomobiletransmissionforkprocessandfixturedesign性质:□毕业设计□毕业论文教学院：机电工程学院系别：机械设计制造及其自动化学生学号：09410114学生姓名：关凯强专业班级：机自0901指导教师：谭丽辉职称：讲师起止日期：2013.3.1～2013.6.20吉林化工学院JilinInstituteofChemicalTechnology吉林化工学院本科毕业设计说明书-I-摘要此次毕业设是由谭丽辉老师亲自指导，设计一解放牌汽车配套变速箱，经过数个月的设计，基本完成此次设计的任务。此变速箱主要是变速叉的设计，采用铣端面、钻孔、铣拔叉内侧、铣拔叉两侧面、铣凸台上面、铣凸台侧面、铣槽等多种工序相结合的变速叉拔叉零件，本人经查阅相关书籍、资料以对此拔叉零件所用到的相关公式、数据做出了一个准确的依据。此零件的设计一共分为三章，和其他拔叉零件的设计一样，首先第一章是绪论对课题背景、意义、理论分析、国内外状况、课题研究主要问题作了介绍。第二章对零件进行了工艺分析，接着对工艺方案进行了比较，最终确定采用先铣拔叉拔爪后铣凸台的工艺方案，选择机床设备及工艺装备拔叉设计的计算。第三章是夹具设计的定位方式及元器件的选择、切削力和夹紧力的计算、定位误差的计算、液压缸的选择，然后是总结、参考文献。本人在设计过程中得到了其他同学的大力支持，并有谭老师的耐心指导，在此表示诚恳的感谢。由于本人水平有限，此次设计难免存在一些缺点和错误，恳请阅读者批评指正。关键词：变速叉；加工工艺；夹具设计关凯强：解放牌汽车变速叉工艺规程及夹具设计-II-AbstractThisgraduationdesignisbyTanLihuitheteacherpersonallyguide,designaJiefangautomobileaccessorygearbox,aftermonthsofdesign,completedthedesignofthetask.Thistransmissionisthemaintransmissionforkdesign,endmilling,drilling,millingthefork,theforktwosideinnermilling,milling,millinglugbossontheside,millingetc.combiningtheprocessesoftransmissionforkforkpartsby,Irefertotherelevantbooks,datafromthisforkpartsusedbytherelatedformula,datatomakeanaccuratebasis.Thisdesignisdividedintofourchapters,andtheotherforkpartsofthedesign,thefirstchapteristheintroductionofthebackground,significance,theoreticalanalysis,thesituationathomeandabroad,theresearchmainlyintroduce.Thesecondchapterofthepartsoftheprocessanalysis,andthentheprocessarecomparedandanalyzed,finallydeterminedbymillingforkpullclawaftermillingconvexprocessscheme,selectionofequipmentandmachinetoolingforkdesigncalculation.Thethirdchapteristhefixturedesignofthepositioningmethodandcomponentsselection,cuttingforceandclampingforcecalculation,thecalculationofthepositioningerror,theselectionofhydrauliccylinder.thensummarized,Ref.Iaminthedesignprocesstogettheotherclassmatestosupportenergetically,andTanteacher'spatientinstructions,toexpresssincerethanks.Becausemyselflevelislimited,thedesignwillinevitablyexistsomeshortcomingsandmistakes,pleasereadercriticism.Keywords:shiftingfork;processingtechnology;fixturedesign吉林化工学院本科毕业设计说明书-III-目录摘要............................................................................................................................................IAbstract..............................................................................................................................................II第一章绪论....................................................................................................................................11.1变速器变速叉的介绍.......................................................................................................11.2变速器行业概况................................................................................................................21.3变速器行业面临挑战......................................................................................................3第二章零件的加工工艺.................................................................................................................52.1零件的作用.......................................................................................................................52.2零件的工艺性分析...........................................................................................................62.2.1零件的加工表面及其要求..................................................................................62.2.2零件材料选择.......................................................................................................62.3毛坯选择...........................................................................................................................72.3.1毛坯的种类...........................................................................................................72.3.2选择毛坯时应考虑的因素..................................................................................82.3.3毛坯形状与尺寸的确定........................................................................................92.4工艺基准选择................................................................................................................102.4.1零件的加工定位原理.......................................................................................102.4.2定位基准的选择原则.......................................................................................102.5拟订加工路线................................................................................................................112.5.1确定各加工表面的加工方法及加工路线.......................................................112.5.2拟定加工路线方案............................................................................................112.6确定机械加工余量、工序尺寸及公差......................................................................132.7选择机床设备及工艺装备............................................................................................142.8确定切削用量和基本工时...........................................................................................142.8.1工序I铣凸台端面........................................................................................