XZ25-50变速箱零件精镗孔专用机床夹具设计.doc

毕业设计I1.XZ25-50箱体变速箱工艺及精镗夹具设计2.小套注塑模具设计1.XZ25-50BOXBODYGEARBOXCRAFTANDFINISHEDBORINGJIGDESIGN2.SMALLWRAPINJECTIONMOLDDESIGN摘要题目一：本课题进行XZ25-50变速箱零件精镗孔专用机床夹具设计，主要步骤和内容分为：（1）箱体零件工艺设计在分析了被加工箱体具体结构及主轴孔精度要求的基础上，依据生产纲领详细制订了箱体加工整体加工工艺路线和工序加工工艺流程(包括工件定位、夹紧、加工刀具的选择、切削用量的确定、切削力与切削功率的计算等)。（2）变速箱零件精镗孔专用夹具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：变速箱；精镗；工艺；专用夹具题目二：本课题进行锥形套注塑模具的设计，主要步骤和内容分为：（1）锥形套注塑模具设计主要内容分析了锥形套注射成型时的工艺特点，介绍了锥形套模具结构及其各个子系统的设计特点。重点设计了锥形套注射结构中浇注系统和脱模机构。毕业设计II（2）锥形套注塑模具设计主要特点本模具采用了“一模十腔”点浇口注塑模具，在脱模机构中采用的是推板和推杆复合推出机构。关键词：注射成型；成型工艺；浇注系统；脱模机构题目一：ABSTRACTThisstudycarriesondesignwiththeSpecialfixtureofroughboringlatheintheXZ25-50gearbox,themainstepandthecontentdividedinto:（1）BoxbodypartsprocessplanningInanalyzingtheprocessingboxbodysconcretestructureandthemainaxleholeprecisionrequest,formulatedwholeprocessingcraftrouteintheboxbodyprocessingandboringworkingprocedureprocessingtechnicalprocessindetail(includingworkpiecelocalization,clamps,processescuttingtoolsseletian,cuttingspecificationsdetermination,cuttingforceandcuttingpowerscomputationandsoon).（2）FinishedboringmachinefixturedesignforgearboxpartsAccordingtothefeatureofprocessedparts,processingrequest,accurayrequestandsoon,doingthepositionfixtureprogramme,orienteddevices,clampingdevicesrationaldesign.Keyword:GearboxFinishedboringProcessplanningSpecialfixture题目二：ABSTRACTThisstudycarriesondesignwiththecone-thimbleinjectionmold,themainstepandthe毕业设计IIIcontentdividedinto:（1）Maincontentofcone-thimbleinjectionmoldingdesignThetechnologycharactersduringcone-thimbleinjectionmoldingareanalyzed,thestructureofcone-thimblemoldanddesignspecialtyineachofitssub-systemsareintroducedseparately.Importantly,todesignthedemouldingmechanismandpouringsysteminthestructureofcone-thimblemold.（2）Maincharacterofcone-thimbleinjectionmoldingdesignThemoldadopt“amoldtencavity”pointgateinjectionmoldandadoptthepushing-plateandputterscompoundpushing-mechanisminthedemouldingmechanism.Keyword:InjectionmouldingMouldingtechnologyCastingsystemDemouldingmechanism毕业设计I目录绪论.1课题一.11工艺分析.11.1零件的功用.21.2零件的工艺分析及技术要求.21.3零件的工艺规程设计.31.3.1粗基准的选择.31.3.2零件各表面加工顺序的确定.41.4毛坯余量与工序余量的确定.41.5确定主要表面的切削刀量及基本工时.51.5.1上平面.51.5.2上平面各孔.61.5.3左端面.71.5.4右端面.81.5.5铣前端面.81.5.6铣后端面.91.5.7粗镗轴承孔,扩倒挡轴孔粗镗.91.5.8精轴承孔,铰挡轴孔.121.5.9后端面螺纹底孔.141.5.10前端面螺及底孔.151.5.11右端面螺纹底孔及通孔.151.5.12左端面各孔.172精镗孔专用夹具设计.222.1定位机构的设计.222.1.1精镗孔定位基准及定位方案.232.2夹紧机构设计.242.2.1切削力的计算.242.2.3夹紧力计算.252.2.4夹紧油缸的选择.262.2.5液压系统的选择.262.3夹具导向装置的设计.272.3.1参数选择.27