阀体零件加工工艺规程及夹具设计

毕业设计论文题目：学生：指导教师：专业：班级：I阀体零件加工工艺规程及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。节流阀体零件的加工工艺规程及其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：阀体；工艺；工序；夹紧；定位；误差IIThedesignofbodypartsprocessingtechnicalprocessandfixtureAbstractThedesigncontentofthemechanicalmanufacturingtechnologyandmachinetoolfixturedesign,metalcuttingmachinetool,tolerancematchingandmeasurementofaspectsofknowledge.Throttlebodypartsprocessingproceduresandfixturedesignisincludingpartsprocessingprocessdesign,processdesignandspecialfixturedesignthreeparts.Shouldfirstanalyzethepartsintheprocessdesign,understandpartsoftechnologytodesignthestructureofblank,andchoosethegoodpartsprocessingbenchmark,designprocessoftheparts;Thenthepartssizeofeachworkstepoftheprocess,thekeyistodeterminetheprocessequipmentforeachprocessandcuttingparameter;Forthedesignofspecialfixture,thenselectdesignoutofthecomponentpartsofthefixture,suchasthepositioningdevice,clampingdevice,ledcomponents,specificconnectionwithmachinepartsandotherparts;Calculatedattheexitoffixturelocatingpositionerror,analysistherationalityofthefixturestructureanddeficiency,andpayattentiontotheimprovementinthelaterdesigning.Keywords:Thevalvebody;Thecraft;theworkingprocedure;clampthelocalization;theerrorI目录摘要.........................................................................................................................................IAbstract..................................................................................................................................II1绪论....................................................................................................................................12夹具的概述.........................................................................................................................12.1夹具的发展趋势...................................................................................................22.2夹具的组成............................................................................................................32.3夹具的作用与意义...............................................................................................43PROE设计软件介绍.........................................................................................................63.1PROE设计软件介绍............................................................................................63.2PRO/E的CAM功能应用...................................................................................73.3设计任务及要求...................................................................................................73.4加工环境介绍.......................................................................................................84阀体零件加工工艺的基本理论.......................................................................................94.1阀体零件机械技工工艺过程及组成....................................................................94.1.1工艺过程......................................................................................................94.1.2工艺过程的组成..........................................................................................94.2阀体制造专业的工艺文件..................................................................................105阀体加工工艺规程的设计..............................................................................................135.1阀体的作用..........................................................................................................135.2阀体的工艺性分析.............................................................................................135.2.1阀体材料的选择及毛坯成型....................................................................135.2.2工艺路线的分析及拟订............................................................................135.2.3刀具的选择及切削用量的确定...............................................................166夹具的设计.......................................................................................................................186.1设计夹具应该注意的问题..............................................错误！未定义书签。6.2定位和夹紧方案的确定...................................................错误！未定义书签。6.3定位误差的计算...............................................................错误！未定义书签。II6.4螺母的夹紧力....................................................................错误！未定义书签。6.5钻模的钻孔精度计算.......................................................错误！未定义书签。6.6钻套的设计........................................................................错误！未定义书签。6.6.1钻套内孔直径的确定..............................................错误！未定义书签。6.6.2钻套材料的选择.......................................................错误！未定义书签。6.6.3钻套与工件间的距离h的确定..............................错误！未定义书签。7夹具的三维建模过程......................................................................................................237.1钻套的建模........................................................................错误！未定义书签。7.2垫脚的建模.....................................