汽车后桥壳

I摘要汽车后桥壳是汽车的重要组成部分，它与主减速器、差速器和车轮传动装置组成驱动桥。驱动桥处于动力传动系的末端，其机动功能是增大由传动轴或变速器传来的转矩，并将动力合理的分配给左、右驱动轮，另外驱动桥桥壳是汽车上重要的承载件和传力件。驱动桥的桥壳不仅支承汽车重量，将载荷传递给车轮，而且还承受由驱动车轮传递过来的牵引力、制动力、侧向力、垂向力的反力以及反力矩，并经悬架传给车架或车身。在汽车行驶过程中，由于道路条件的千变万化，桥壳受到车轮与地面间产生的冲击载荷的影响，可能引起桥壳变形或折断。因此，驱动桥壳应具有足够的强度、刚度和良好的动态特性，合理地设计制造驱动桥壳是提高汽车行驶稳定性的重要措施，汽车后桥壳广泛应用于各种车辆当中。所设计的后桥壳夹具可广泛应用于卡车的后桥壳加工中，后桥壳起保护和支撑的作用，其主要加工表面为端面外圆、法兰平面、弹簧座平面、以及内孔等。本次设计的内容主要包括机械加工工艺规程、夹具的设计。结合本次设计零件的特点，在设计中完成工艺规程一套，夹具一套。铣床夹具，采用手动夹紧。通过对汽车后桥壳夹具的学习和设计，可以更好的学习并掌握现代夹具设计与机械设计的全面知识和技能。关键词：汽车后桥；工艺规程；夹具IIAbstractAutomobilerearbridgeisanimportantpartofthecar,withthemainreducer,differentialandintegraldriveaxlewheeltransmissiondevice.Drivebridgeattheendofpowertransmissionlines,themotorfunctionisincreasedbytransmissionorgearboxtransmissionoftorque,andpowerdistributiontotheleftandrightdrivingwheel,andtheautomobiledriveaxlehousingistheimportantloadbearingandpowertransmission.Driveaxlehousingnotonlysupportstheweightofthecar,willloadtothewheel,andalsobearthedrivewheelspassoverthetractionforce,brakingforce,lateralforce,verticalforcereactionforceandtorque,andthesuspensiontotheframeorbody.Intheprocessofmovingvehicle,themyriadsofchangesduetoroadconditions,thebridgeshellunderwheelandthegroundproduceseffectofimpactload,maycausetheaxlecasingdeformationorbreaking.Therefore,driveaxlehousingshouldhaveenoughstrength,stiffnessandgooddynamiccharacteristics,reasonabledesignandmanufactureofdriveaxlehousingistheimportantmeasuretoimprovevehiclestability,autorearbridgeshelliswidelyusedinvariousvehicles.Thedesignofrearaxlehousingclampcanbewidelyusedintruckrearaxleshellprocessing,rearaxlehousingforprotectionandsupportrole,itsmainworkingsurfacetofacecircular,flatflange,springseat,andtheinnerholeoftheplane.Thisdesigncontentmainlyincludestheprocess,fixturedesign.Combinedwiththedesignofpartsofthecharacteristics,inthedesignofasetofcompleteprocedure,asetofclamps.Millingfixture,manuallyclamping.Theautomobilerearaxlehousingclampstudyanddesign,canbeabetterlearningandmasteryofmoderndesignandthemechanicaldesignofthecomprehensiveknowledgeandskills.Keywords:therearaxleofautomobile；thecrafuanaluses；machinetoolfixtureIII目录摘要.............................................................................................................................IAbstract.........................................................................................................................II第1章绪论.................................................................................................................11.1机床夹具及其组成.........................................................................................11.1.1概述.......................................................................................................11.1.2机床夹具的组成...................................................................................11.2机床夹具的分类.............................................................................................21.3机床夹具的国内外发展现状.........................................................................21.3.1国内发展现状.......................................................................................31.3.2国外发展现状.......................................................................................31.4机床夹具的发展方向.....................................................................................4第2章后桥壳工艺方案总体设计.............................................................................62.1汽车后桥发展趋势.........................................................................................62.1.1我国汽车后桥制造业的现状及其发展趋势.......................................62.1.2汽车后桥壳体的构造及性能要求.......................................................62.2后桥壳零件的分析.........................................................................................72.2.1后桥壳的作用.......................................................................................72.2.2后桥壳的工艺分析...............................................................................72.2.3后桥壳生产类型及毛坯制造形式的确定...........................................92.2.4加工后桥壳基面的选择.......................................................................9第3章后桥壳机械加工工艺规程设计...................................................................113.1机械加工工艺路线的选择...........................................................................113.1.1工艺方案拟定.....................................................................................113.1.2工艺方案比较分析.............................................................................123.1.3加工余量、工序尺寸、毛坯尺寸的确定.......................................133.2确定切削用量及机动时间...........................................................................143.2.1工序一的切削用量及机动时间.........................................................143.2.2工序二的切削用量及机动时间.........................................................193.2.3工序三的切削用量及机动时间.........................................................203.2.4工序四的切削用量及机动时间.........................................................233.2.5工序五的切削用量及机动时间.........................................................243.2.6工序七的切削用量及机动时间