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+独创性声明本人声明所呈交的学位论文是我个人在导师指导下进行的研究工作及取得的研究成果。尽我所知，除文中已经标明引用的内容外，本论文不包含任何其他个人或集体已经发表或撰写过的研究成果。对本文的研究做出贡献的个人和集体，均已在文中以明确方式标明。本人完全意识到，本声明的法律结果由本人承担。学位论文作者签名：日期：年月日学位论文版权使用授权书本学位论文作者完全了解学校有关保留、使用学位论文的规定，即：学校有权保留并向国家有关部门或机构送交论文的复印件和电子版，允许论文被查阅和借阅。本人授权学校可以将本学位论文的全部或部分内容编入有关数据库进行检索，可以采用影印、缩印或扫描等复制手段保存和汇编本学位论文。保密□，在____年解密后适用本授权书。不保密□。（请在以上方框内打“√”）学位论文作者签名：指导教师签名：日期：年月日日期：年月日本论文属于√湖北汽车工业学院毕业（设计）论文-1-摘要本毕业设计的课题是康明斯发动机飞轮壳的加工工艺及其夹具设计，关键的工作任务有两个：一是飞轮壳零件加工工艺规程的设计；二是飞轮壳零件的工装夹具的设计。对于发动机飞轮壳工艺设计时，首先要做的是对零件进行结构和加工工艺的分析，做了第一步分析以后，根据飞轮壳的生产纲领，材料及其加工要求等来确定毛坯到底应该以什么样的方式来制造，另外就是基准选择和工艺路线的制定，最后进行机床和刀具的选择，加工余量、工序尺寸及切削用量等计算与确定。第二篇夹具设计中，设计了一套车端面、内孔的夹具，首先是定位基准的选择，根据各自工序的不同特点来进行定位基准的选择，其次进行切削力及夹紧力的计算，最后进行误差分析。关键字：飞轮壳康明斯工艺规程定位工装夹具湖北汽车工业学院毕业（设计）论文-2-AbstractThegraduatedesignissueistheprocessofCumminsEngineflywheelhousingandfixturedesign,twokeytasks:First,theflywheelhousingpartsprocessplanningdesign;flywheelhousingpartsfixturedesign.Fortheprocessdesignoftheengineflywheelhousing,thefirstthingtodoisstructureandprocessanalysisoftheparts,thefirststep,accordingtotheflywheelhousingproductionprogram,materialsandtheirprocessingrequirementstodeterminetheroughintheendshouldbewhatkindofapproachtomanufacturing,theotheristhecalculationofthereferenceselectionandformulationoftheprocessroute,thefinalchoiceofmachinesandtools,allowance,stepsizeandcuttingOK.Thesecondfixturedesign,thedesignofacarfacetheinnerholeofthejig,thefirstisthechoiceofthepositioningreference,accordingtothedifferentcharacteristicsoftherespectivesteptothechoiceofpositioningreference,followedbythecalculationofthecuttingforceandtheclampingforce,Finally,erroranalysis.Keywords:FlywheelhousingCumminsPositioningLocateFixture湖北汽车工业学院毕业（设计）论文-3-目录摘要........................................................................................................(1)Abstract....................................................................……………………..(2)1.绪论1.1本课题的来源、目的及意义............................................................(5)1.2国内外概况、预测.............................................................................(6)2.零件分析2.1飞轮壳的结构工艺性分析.................................................................(8)2.2飞轮壳加工方案设计........................................................................(8)2.3飞轮壳的加工特点..........................................................................(9)2.4飞轮壳的技术要求分析....................................................................(9)3.工艺规程设计3.1确定生产纲领和生产类型...............................................................(11)3.2确定毛坯制造形式...........................................................................(11)3.3制定工艺路线...................................................................................(11)4.机械加工余量、工序尺寸、及毛坯尺寸的确定4.1确定加工余量...................................................................................(17)4.2确定工序尺寸...................................................................................(17)5.切削用量及工时的计算工序一粗车端面、内孔.........................................................................(21)工序二粗铣顶面.....................................................................................(22)工序三钻、扩、铰定位孔.....................................................................(27)工序四半精车内孔、端面.....................................................................(30)工序五精车内孔、止口、端面.............................................................(35)工序六粗铣悬挂面.................................................................................(39)工序七精铣顶面.....................................................................................(43)工序八精铣悬挂面.................................................................................(44)工序九粗镗油封孔、油封孔下台、马达孔.........................................(47)工序十半精镗油封孔、油封孔下台、马达孔.....................................(50)工序十一精镗Φ160mm油封孔下台、精镗马达孔...........................(53)工序十二扩、铰Φ29.6孔.....................................................................(55)工序十三钻6-Φ13.5孔........................................................................(57)工序十四钻、攻3-M10螺纹和钻、攻2-M8螺纹.............................(58)湖北汽车工业学院毕业（设计）论文-4-工序十五钻、攻8-M12螺纹................................................................(62)工序十六钻Φ23.3孔、攻管螺纹.........................................................(64)工序十七钻、攻M18螺纹孔...............................................................(65)工序十八钻、攻12-M10螺纹底孔......................................................(68)6.夹具设计6.1夹具的设计......................................................................................(70)6.2零件的定位分析和基准选择..........................................................(70)6.3零件的夹紧分析..............................................................................(71)6.4零件的夹紧力和夹紧力计算..........................................................(71)6.5定位误差分析..................................................................................(73)总结....................................................................................................(74)致谢..........................................................................................