前端齿轮罩盖工艺工装设计说明书[带图纸].doc -- 45 元

编号无锡太湖学院毕业设计（论文）题目前端齿轮罩盖工艺工装设计信机系机械工程及自动化专业学号学生姓名指导教师（职称高工）2013年5月25日无锡太湖学院本科毕业设计（论文）诚信承诺书本人郑重声明所呈交的毕业设计（论文）前端齿轮罩盖工艺工装设计是本人在导师的指导下独立进行研究所取得的成果，其内容除了在毕业设计（论文）中特别加以标注引用，表示致谢的内容外，本毕业设计（论文）不包含任何其他个人、集体已发表或撰写的成果作品。班级机械97学号0923805作者姓名2013年5月25日II摘要齿轮罩盖目前是一种普遍的机械装置，应用于大批量生产领域，具有相当大的作用，主要是起到对产品的一个保护作用，可以避免杂质进入机械，也对操作者的安全有极大的保护，所以罩盖的设计要求还是很高的本文就是社会生产的实际需要提出的设计题目，罩盖的设计是要根据你所要配置的机械设备的尺寸，这里加工的前端齿轮罩盖外形不是规整的，我们通过数控铣床还是比较容易加工的，在编程的过程中弧形指令用的多一点。加工小孔只需要选择对应的麻花钻，有的需要攻丝，大孔我们需要在镗床上进行加工本文在夹具设计上还是费了时间的，由于我们的零件是薄壁零件，外形不规则，所以增加了夹具设计的难度，我们第一个选择的是通过一个大孔的夹紧定位，采用的一面俩銷，这也是常用的定位方式，由于我们粗糙度要求不高，这样的定位可以满足我们的加工。一套夹具是不能够很好的加工的，所以我们还做了一副铣床上的第二副夹具，便于加工出更精准的零件最后希望此次设计的夹具能达到预期的设计要求，并能在实际的应用中取得良好的效果。关键词铣床镗床钻孔夹具IIIAbstractGearcovercapisakindofgeneralmachinery,appliedinmassproduction,haveconsiderableeffect,mainlyplayaprotectiveroleofproductsItcanavoidimpuritiesintothemachinery,anditcanprotecttheoperatorsafetygreatly.SothedesignofthecovercaprequirementisveryhighThispaperistodesigntopic,putforwardbytheproductionofthepracticalneedofsocietyLidisdesignedaccordingtoyoutoconfigurethesizeofthemechanicalequipment.Thisprocessingandthefrontendofthegearcovercapisnotneatappearance.ButweareeasytoprocessingbyCNCmillingmachine.Intheprocessofprogrammingarccommandwithalittlemore.Processingholesonlyneedtoselectthecorrespondingtwistdrill,someneedtotapping.ButbigholesweneedontheboringmachineforprocessingThisarticleonthefixturedesignstillhadtime.Asaresultofourpartsarethinwalledpartsandithasirregularshape.Soincreasingthedifficultyoffixturedesign.Wearethefirstchoiceisthroughaclampingpositioningholeanduseonesideofthetwopins.Thisisalsoacommonwayofclamping,duetoourroughnessrequirementisnothigh.Soitspositioningcanmeetourprocessing.Asetoffixtureisnotabletoverygoodprocessing,sowealsoadoptthehydraulicsystemdrivesthesecondfixture,itseasytoworkoutmoreaccuratepartsLasthopethedesignofthefixturecanachievethedesireddesignrequirements,andcanachievegoodeffectinpracticalapplication.KeywordsmillingmachineboringmachinedrillingfixtureV目录摘要...........................................................................................................................................IIABSTRACT.................................................................................................................................III1绪论............................................................................................................................................11.1本课题的研究内容和意义.....................................................................................................................11.2国内外的发展概况..................................................................................................................................11.3本课题应达到的要求..............................................................................................................................12分析零件....................................................................................................................................32.1零件作用....................................................................................................................................................32.2零件结构分析...........................................................................................................................................32.3零件技术要求分析..................................................................................................................................32.4零件的三维造型......................................................................................................................................43确定毛坯零件类型....................................................................................................................73.1毛坯选择....................................................................................................................................................73.2铸件加工余量...........................................................................................................................................74拟定工艺路线............................................................................................................................84.1零件表面孔加工方法.............................................................................................................................84.2工序的合理组合......................................................................................................................................84.2加工顺序的选择......................................................................................................................................84.3确定工艺路线...........................................................................................................................................84.3.1工艺路线一....................................................................................................................84.3.2工艺路线二.....................................................................................................................94.3.3最终工艺路线三..........................................................................................................105选择定位基准..........................................................................................................................115.1粗基准选择..............................................................................................................................................115.2精基准选择..............................................................................................................................................116．确定机械加工余量，工序尺寸............................................................................................126.1各工序加工余量....................................................................................................................................126.2确定各工序加工余量和基本工时.....................................................................................................137．夹具设计................................................................................................................................267.1镗夹具设计.............................................................................................................................................267.1.1镗夹具的选择与设计...................................................................................................277.1.2夹紧机构定位方案的选择..........................................................................................287.1.3夹紧机构方案的选择...................................................................................................297.1.4夹具体的设计...............................................................................................................30