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摘要差速器壳是汽车差速器的一个主要零件，它使差速器及其部件中的轴、轴承、套和齿轮等零件按一定的相互位置关系装配成一个整体，并按预定传动关系协调其运动。首先，根据图纸分析零件的技术要求和难加工方面,零件类型的可以确定毛坯的材料和铸件余量及形状,然后分析加工工艺选择粗细基准以及拟订工艺过程。通过上述分析选择工艺装备。对两种工艺方案进行优化选择，使工艺方案更加完善。此零件有些尺寸需要专用量具，所以需要设计专用的孔轴量具，对零件进行机械加工时，为保证工件加工精度，先要保证工件在机床上占有正确的位置，然后通过夹紧机构使工件在正确位置上固定不动，这一任务就是由机床夹具完成，此钻孔夹具也需要专用夹具，通过对专用夹具知识的理解，对定位误差与加工误差的分析，采用标准件和设计其他专用零部件。关键词：差速器壳，工艺，夹具1ABSTRACTDifferentialcarrierisamajorautomobileparts,itmakesdifferentialandtheircomponentsintheshaft,bearings,gearsandothersparepartskitsandthelocationofcertainmutualrelationsbetweentheassemblyasawhole,andscheduledtodrivetocoordinatetheirrelationsCampaign.First，allpartsofthedrawingsinaccordancewiththetechnicalrequirementsanddifficultprocess,theroughpartstodeterminethetypesofmaterialsandcastingcushionandshape,andprocessingtechnologyofchoiceofsizeandtheformulationofthebenchmarkprocess.Throughthechoiceoftechniqueandequipment.Twooftheprogrammetooptimizethechoiceofprogrammessothatmoreperfect.Somepartsofthissizeneedspecialmeasuringtool,soitisnecessarytodesignspecial-axismeasuringtools,sparepartsformachineryprocessing,toensuretheaccuracyoftheworkpieceprocessing,mustensurethattheworkpieceonthemachineoccupiestherightplace,andthenthroughthebodytoclamptheworkpieceCorrectpositiononthefixed-fixed,thistaskiscompletedbythemachinetoolfixture,thisfixturealsoneedspecialdrillingjigthroughthefixturefortheunderstandingofknowledge,thepositioningerrorandprocessingerroranalysis,usingstandardpartsanddesignandotherspecialcomponents.Keywords:differentialcarrier，technologicalanalysis，clampingdevice2目录第1章绪论···········································································11.1概述···························································································11.2机械制造工艺的进展和发展趋势························································21.3机械加工工艺规程的作用·································································2第2章分析零件图··································································42.1零件的专用··················································································42.2零件的工艺分析············································································42.3确定生产类型···············································································52.4确定毛坯种类················································································52.5确定铸件余量及形状······································································5第3机械加工工艺过程设计·······················································63.1选择定位基准···············································································64.1.1选择精基准·········································································64.1.2选择粗基准·········································································63.2拟定工艺过程···············································································64.2.1选择表面加工方法································································64.2.2确定工艺过程方案································································7第4章选择加工设备和工艺设备··············································104.1选择机床···················································································104.2选择夹具···················································································104.3选择刀具···················································································104.4选择量具···················································································115.4.1工序010粗加工可选通用量具···············································115.4.2工序070铣两侧平面···························································11第5章确定工序尺寸·····························································125.1径向工序尺寸·············································································125.2轴向工序尺寸·············································································125.2.1按规定建立轴向工序尺寸联系表············································1235.2.2查表确定工序基本余量························································125.2.3由最终工序向前推算工序基本尺寸及毛坯尺寸·························125.2.4查表确定工序尺寸的加工精度···············································125.2.5由各加工方法的经济精度确定工序尺寸偏差·····························125.2.6校核设计尺寸····································································13第6章确定切削用量·····························································156.1工序010切削用量·······································································156.1.1工步1粗车内外端面T1、T2、T3的切削用量······························156.1.2工步2粗镗内孔D1、D2、D3的切削用量····································166.2工序020切削用量·······································································206.2.1选择刀具··········································································206.2.2确定背吃刀量····································································206.2.3确定进给量f·····································································206.2.4确定切削速度v··································································206.2.5校核机床功率····································································216.2.6工步2粗车外圆D5、D6、D8以及镗内孔ø40+0.33+0.17的切削用量······