齿轮泵泵体的加工工艺与专用夹具设计-毕业论文

哈尔滨理工大学毕业设计论文---1-齿轮泵泵体的加工工艺与专用夹具设计摘要本次设计内容涉及了机械制造工艺及机床夹具设计、金属切削机床、公差配合与测量等多方面的知识。阀体加工工艺规程及其钻孔的夹具设计是包括零件加工的工艺设计、工序设计以及专用夹具的设计三部分。在工艺设计中要首先对零件进行分析，了解零件的工艺再设计出毛坯的结构，并选择好零件的加工基准，设计出零件的工艺路线；接着对零件各个工步的工序进行尺寸计算，关键是决定出各个工序的工艺装备及切削用量；然后进行专用夹具的设计，选择设计出夹具的各个组成部件，如定位元件、夹紧元件、引导元件、夹具体与机床的连接部件以及其它部件；计算出夹具定位时产生的定位误差，分析夹具结构的合理性与不足之处，并在以后设计中注意改进。关键词工艺;工序;切削用量;夹紧;定位;误差哈尔滨理工大学毕业设计论文---2-GearpumpbodyprocessandspecialfixturedesignAbstractThisdesigncontenthasinvolvedthemachinemanufacturecraftandtheenginebedjigdesign,themetal-cuttingmachinetool,thecommondifferencecoordinationandthesurveyandsoonthevariousknowledge.Bodyprocessplanninganddrillingfixturewasdesignedtoincludepartmachiningprocessdesign,processdesign,anddedicatedfixturedesignofthreeparts.Inprocessdesign,analysisofthepartmustfirstunderstandthepartsoftheprocessre-engineeringthestructureofablank,andselectagoodpartoftheprocessingofthebasetodesignpartsprocessroute;followedbythevariousworkingstepsonthepartoftheproceduresforthesizeofthecalculation,thekeyistodeterminethevariousstagesofworkoutofprocessequipmentandcuttingconsumption;thendedicatedfixturedesign,selectionofdesignoutofallthecomponentpartsfixture,suchasthepositioningcomponents,clampingcomponents,guidingelements,thespecificfolderconnectionwiththemachinepartsandothercomponents;calculatethepositioningfixturepositioningerrorgenerated,analysisfixturestructureisreasonableanddeficiencies,andattentiontoimprovingthedesigninthefuture.KeywordsThecraft;theworkingprocedure;thecuttingspecificationsclamp;thelocalization;theerror哈尔滨理工大学毕业设计论文-III-目录摘要.............................................................................................................................IAbstract......................................................................................................................II第1章绪论..............................................................................................................11.1课题背景........................................................................................................1第2章零件的分析.................................................................................................22.1零件的作用....................................................................................................22.2零件的工艺分析............................................................................................2第3章工艺规程设计.............................................................................................43.1确定毛坯的制造形式...................................................................................43.2毛坯的设计....................................................................................................43.3选择定位基准................................................................................................53.3.1精基准的选择.........................................................................................53.3.2粗基准的选择.........................................................................................63.4制定工艺路线................................................................................................73.4.1工序的合理组合....................................................................................73.4.2工序的集中与分散................................................................................73.4.3加工阶段的划分....................................................................................83.4.4工艺路线.................................................................................................93.5机械加工余量、工序尺寸及毛坯尺寸的确定.......................................10第4章确定切削用量及基本工时......................................................................12第5章夹具设计...................................................................................................235.1设计夹具的目的..........................................................................................235.2夹具的分类..................................................................................................235.3专用夹具的组成..........................................................................................255.4典型的定位元件..........................................................................................255.5夹具中的夹紧机构.....................................................................................275.6夹具的发展趋势..........................................................................................285.7本课题夹具设计..........................................................................................295.7.1问题的提出...........................................................................................295.7.2定位基准的选择..................................................................................295.7.3切削力及夹紧力计算..........................................................................295.7.4定位误差分析.......................................................................................315.7.5定向键与对刀装置设计......................................................................31哈尔滨理工大学毕业设计论文-IV-5.7.6夹具设计及操作简要说明....................................................