壳体机械加工工艺及其夹具设计

攀枝花学院本科毕业设计（论文）壳体机械加工工艺及其夹具设计学生姓名：周勇均学生学号：200910601170院（系）：机械工程学院年级专业：09级机械设计制造及其自动化指导教师：杨光春二〇一三年六月攀枝花学院本科毕业设计（论文）摘要I摘要本课题的主要研究内容是某种壳体零件的机械加工工艺及夹具设计。壳体零件是一种很重要的零件，它起到了支承和包容传动的作用。本课题的主要任务就是设计一种加工成本低，加工时间短，加工合理的一种方案，还要设计一种专用夹具。在设计初，首先要看懂零件图，并对零件的结构和工艺进行分析，明确粗基准和精基准的选择，确定零件的加工余量与毛坯的尺寸，从而明确零件的加工工艺过程，最后再计算各工序的切削用量及工时。夹具是零件加工的夹紧装置，是加工零件的一种必不可少的装置。随着零件的尺寸变化，越来越多的夹具被淘汰了，因此，设计一套专用夹具是十分有必要的。在设计专用家具时要考虑工件的定位方案（如:定位原理分析、定位方法、定位元件及其装置），工件的夹紧方案和设计夹紧机构，家具的其他组成部分，夹具的结构形式等。关键字：壳体，工艺分析，专用夹具攀枝花学院本科毕业设计（论文）AbstractIIAbstractThemainresearchcontentsofthissubjectismechanicalprocessingtechnologyandfixturedesignofsomeoftheshellparts.Theshellpartsisakindofpartsisveryimportant,anditplaysasupportingandembracingtransmissionfunction.Themaintaskofthisprojectistodesignalowcost,shortprocessingtime,aschemeofreasonable,butalsotodesignaspecialfixture.Atthebeginningofthedesign,firstofalltounderstandthepartdrawing,andthestructureandprocessofpartsisanalyzed,clearandbenchmarkcrudebenchmarksselection,determinationofmachiningallowanceandblankpartssize,machiningprocesssoastocleartheparts,thencalculatetheamountofcuttingandworkinghoursofeachworkingprocedure.Fixtureclampingdevicepartsprocessing,isadeviceforprocessingparts.Alongwiththechangeinthesizeofthefixtureparts,moreandmoretobeeliminated,therefore,todesignaspecialfixtureisverynecessary.InthedesignofspecialfurnituretoconsidertheworkpiecepositioningProgramme(suchas:positioningprincipleanalysis,positioningmethod,positioningdeviceanddevice),workpiececlampingschemeandthedesignofclampingmechanism,theotherpartofthefurniture,fixturestructureetc..Keywords:Housing:ProcessAnalysis:specialfixture.攀枝花学院本科毕业设计（论文）目录目录摘要.......................................................................IAbstract.........................................................II前言.............................................................11零件的分析.............................................................................................................................21.1零件的作用........................................................................................................................21.2零件的工艺分析................................................................................................................22工艺规程设计........................................................................................................................32.1确定毛坯的制造形式........................................................................................................32.1.1基面的选择.............................................................................................................32.1.2粗基准的选择.........................................................................................................32.1.3精基准的选择.........................................................................................................32.2制定工艺路线....................................................................................................................42.2.1路线1......................................................................................................................42.2.2路线2......................................................................................................................52.2.3工艺方案的比较与分析.........................................................................................53机械加工余量及毛坯的尺寸确定....................................................................................63.1确定各加工面的加工余量................................................................................................63.1.1粗铣各表面的加工余量.........................................................................................63.2确定切削用量及基本工时................................................................................................83.2.1铣φ175mm左圆端面............................................................................................83.2.2镗φ145mm的内圆及铣底面..............................................................................103.2.3粗铣上面34×34mm的凹槽及其64×62mm的凹槽.......................................133.2.4镗2—φ155mm的内圆及其铣底面...................................................................153.2.5镗φ50mm的孔....................................................................................................183.2.6镗φ90mm的孔....................................................................................................183.2.7钻扩铰φ30mm的孔............................................................................................193.2.8钻扩铰φ40mm孔................................................................................................213.2.9钻铰φ5mm孔.....................................................................................................233.2.10钻铰φ3mm孔....................................................................................................253.2.11钻铰φ10mm孔..................................................................................................263.2.12钻铰φ11mm孔................................................................................