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XZ25.50变速箱箱体制造工艺规程及专用夹具设计(镗)毕业论文.doc

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XZ25.50变速箱箱体制造工艺规程及专用夹具设计(镗)毕业论文.doc

I摘要本课题进行XZ2550变速箱零件精镗孔专用机床夹具设计,主要内容分为首先是对箱体零件工艺设计,在分析了XZ2550变速箱箱体的具体结构及技术要求的基础上,详细制定了两种箱体加工整体加工工艺路线,并比较其优劣选择最优的方案进行加工。根据各道工序的技术要求,选定各道工序的背吃刀量、进给量、切削速度以及所采用的机床、刀具、夹具等,确定各道工序的时间定额,从而绘制工艺过程卡片。然后对精镗孔专用夹具进行设计,对专机进行总体设计-三图即为零件工序图、加工示意图、机床联系尺寸图的设计。根据被加工零件的结构特点、加工内容的尺寸和精度要求,对夹具的定位方案、导向装置、夹紧装置进行合理的设计。关键词组合镗床工艺精镗专用夹具IIABSTRACTThistopiccarriesondesignwiththecombinedboringmachineintheXZ2550gearbox,themaincontentdividedintoFirst,aboutboxbodypartsprocessplanning,atthebaseofanalyzingtheXZ2550gearboxbodysconcretestructureandthetechnologicalspecification.Iformulatedtwokindofboxbodyprocessingprocessrouteindetail,andcomparedthemtochoosethemostsuperiorprocessroutetocarryontheprocessing.Accordingtoeachproceduresspecification.Idesignatedthepenetrationofacuttingtool,thefeedquantity,thecuttingvelocityaswellas,thecuttingtool,thejigandsoon,whichdeterminethetimequota,andmaketheprocesscard.Second,roughboringmachinefixturedesignforgearboxparts,Ideterminedthatcombinedboringmachinesdispositionplan,carriedonasystemdesignthreedrawingsnamelythecomponentsworkingprocedurechart,theprocessingschematicdrawing,thetoolrelationdimensionaldrawingdesign.Third,Accordingtothefeatureofprocessedparts,processingrequest,accurayrequestandsoon,doingthepositionfixtureprogramme,orienteddevices,clampingdevicesrationaldesign.KeywordCombinedboringmachineProcessBoringwithahighaccuracySpecialfixtureIII徐州工程学院毕业设计论文I目录绪论.................................................................................................................................................11箱体零件加工工艺规程设计.....................................................................................................21.1XZ2550变速器壳体的用途..............................................................................................21.2零件的工艺分析...................................................................................................................21.3确定箱体的生产类型..........................................................................................................21.4确定箱体毛坯制造形式和尺寸..........................................................................................21.4.1确定毛坯的制造种类和制造方法...............................................................................21.4.2毛坯余量和工序余量的确定.......................................................................................31.5定位基准的选择..................................................................................................................31.5.1粗基准的选择...............................................................................................................31.5.2精基准的选择...............................................................................................................31.6确定箱体零件各加工表面的加工方案..............................................................................31.7确定工艺方案的原则及注意问题......................................................................................41.7.1粗、精加工阶段分开原则...........................................................................................41.7.2工序集中和分散原则...................................................................................................41.8工艺路线的确定..................................................................................................................61.9确定各表面的切削用量和基本工时..................................................................................61.9.1工序50粗精铣上表面.................................................................................................61.9.2工序60钻上表面各螺纹底孔以及孔.........................................................................71.9.3工序70攻上表面各螺纹以及铰孔.............................................................................81.9.4工序80粗精铣左右表面.............................................................................................81.9.5工序90粗镗半精镗精镗左右面上轴承孔,扩铰倒档孔.....................................91.9.6工序100钻左右面上的螺纹底孔以及孔.................................................................121.9.7工序110攻左右面上的螺纹.....................................................................................141.9.8工序120粗精铣前后各面和倒档孔内端面以及铣倒档孔内槽.............................151.9.9工序130钻前后面上的螺纹底孔以及孔.................................................................161.9.10工序140攻前后面上的螺纹孔以及孔...................................................................182专用夹具的设计........................................................................................................................212.1对镗床夹具的具体的要求................................................................................................212.2夹具体的毛坯结构............................................................................................................212.3夹具元件的选择与设计.....................................................................................................212.3.1定位元件的选择与设计..............................................................................................212.3.2夹紧元件的选择与设计..............................................................................................22

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