CA6140型普通车床刀架中部转盘机械加工工艺规程

I摘要在机械加工中使用着大量的夹具，用以安装加工对象，使之占有正确的位置，以保证工件的加工质量。根据零件本身的特点、生产类型以及零件在具体工作时的作用选择工艺规程和夹具。在工艺规程方面：通过对普通车床的研究对刀架中部转盘及工艺参数采取一个优化策略，研制一个好的转盘。从而缩短生产周期，降低制造成本，提高加工精度，延长刀具寿命，而且依据优化了的工艺及刀具参数，可以建立或完善高速切削工艺数据库，将切削工艺实践中积累的合理选择切削参数与刀具的经验和数据收集起来，为现场加工提供准确及优化的高速切削数据，从而更大程度上提高切削加工水平，获得更大的经济利益；在夹具设计方面，因为是盘类零件，加工两侧面，选择立式铣床加工，考虑诸多因素拟订最优方案：有效的减少工件加工的基本时间和辅助时间、提高劳动生产率、有效减低工人劳动强度，最终完成本次设计。关键词：转盘；转盘机械加工工艺；专用夹具设计IIAbstractInmachiningusealargenumberoffixturetoinstallprocessingobject,tohavethecorrectposition,toensurethattheprocessingquality.Accordingtothecharacteristicsofitself,productionpartsandpartsinthespecificworktypetheroleofselectionprocessplanningandfixtures.Intheprocessplanningaspects:basedontheresearchoftheordinarylathetoolcentralwheelandtheprocessparameterstotakeaoptimizationstrategy,developedagoodturntable.Soastoshortentheproductioncycle,reducemanufacturingcostsandimprovemachiningprecisionandextendthelifeofcutter,andbasedontheoptimizationofprocessparametersandtools.Canestablishorperfectprocessdatabasehigh-speedcutting,cuttingprocesswillaccumulateinpracticethereasonableselectionofcuttingparametersofthetoolandtheexperienceanddatacollected,andtheprocessingtoprovideaccurateandoptimizationofhighspeedcuttingdata,moredegreeincreasecuttingprocessinglevelandgetmoreeconomicinterests；Thefixturedesign,becauseitisdishpartsprocessing,twoside,choiceofverticalmillingmachine,soconsideringmanyfactorsdrawuptheoptimumscheme:reducetheprocessingofprimetimeandauxiliarytime,improvelaborproductivity,reducelaborintensity,finallycompletethedesign.Keywords:turntable；Makinguptheprocessofmachineworkmanship；SpecialjigdesignIII目录摘要............................................................................................................................................IAbstract........................................................................................................................................II第1章绪论................................................................................................................................11.1现代机床夹具国内外发展概况...................................................................................11.1.1国内发展概况....................................................................................................11.1.2国外发展概况....................................................................................................21.2CA6140普通车床刀架中部转盘概述.........................................................................31.2.1转盘的用途........................................................................................................31.2.2转盘的技术要求................................................................................................41.2.3转盘的工艺性....................................................................................................41.2.4转盘的生产类型确定........................................................................................4第2章转盘机械加工工艺规程设计........................................................................................62.1分析零件图...................................................................................................................62.1.1零件的作用........................................................................................................62.1.2零件的工艺分析................................................................................................62.2选择毛坯制造形式.......................................................................................................62.3拟定工艺路线...............................................................................................................72.3.1划分加工阶段....................................................................................................72.3.2选择基准............................................................................................................72.3.3确定加工方案....................................................................................................82.4确定加工余量及工序尺寸...........................................................................................92.4.1确定各表面的加工余量....................................................................................92.5确定切削用量及工时定额.........................................................................................112.5.1铣燕尾面A、B及D面、空刀面F...............................................................112.5.2铣尺寸237.5两侧面Q...................................................................................162.5.3车Φ70h6外圆面N，端面，倒角，Φ186外圆，端面D............................172.5.4钻、扩、铰Φ35H7孔，钻2×Φ13孔...........................................................252.5.5铣斜面E，磨燕尾面.......................................................................................28第3章铣床夹具设计..............................................................................................................313.1问题的提出.................................................................................................................31IV3.2夹具设计.................................................................................