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主轴箱箱体工艺及工装设计论文[带图纸].doc

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主轴箱箱体工艺及工装设计论文[带图纸].doc

编号无锡太湖学院毕业设计(论文)题目主轴箱箱体工艺及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(职称副教授)(职称)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)主轴箱箱体工艺及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92学号0923058作者姓名2013年5月25日III摘要本文是对箱体零件三维造型及零件的机械加工工艺路线进行设计,并按照加工工序的要求进行了夹具设计。三维造型主要表达了零件的造型过程,并可根据零件三维图样自动生成零件的数控加工程序。主轴箱作为箱体类零件,其主要加工表面是平面及孔。其加工路线长,加工时间多,加工成本较高,零件的加工精度要求也较高。按照机械加工工艺要求,遵循先面后孔的原则,并将孔与平面的加工明确划分成粗加工和精加工阶段以保证加工精度。基准选择以底面作为粗基准,以底面与两个工艺孔作为精基准,确定了其加工的工艺路线和加工中所需要的各种工艺参数。在零件的夹具设计中,主要是根据零件加工工序要求,分析应限的自由度数,进而根据零件的表面特征选定定位元件,再分析所选定位元件能否限定应限自由度。确定了定位元件后还需要选择夹紧元件,最后就是确定专用夹具的结构形式。关键词主轴箱加工工艺工序专用夹具IVAbstractThisarticleistothebodyparts3dmodellingandpartsmachiningprocessroutedesign,andaccordingtotherequirementsofmachiningprocessforfixturedesign.3dmodellingmainlyexpressedthemouldingprocessoftheparts,andcanaccordingtotheparts3ddrawingsofncmachiningprogramautomaticallygenerateparts.Themainspindlebox,aboxbodyparts,themainprocessingsurfaceisflatandhole.Itsprocessingroute,longprocessingtime,processingcostishigher,themachiningprecisionofpartsrequestalsoishigher.Accordingtothemachiningprocessrequirement,followtheprincipleofsurfaceholeafterfirst,andwillbeintheplaneoftheholeandprocessingintoroughmachiningandfinishmachiningstagetoensurethemachiningaccuracy.Crudebenchmark,thebenchmarkchoiceonbottomasthebottomwithtwoholeasabenchmark,todeterminetheprocessingtechnologyandprocessingrequiredinthevariousprocessparameters.Inpartsoffixturedesign,mainlyaccordingtothepartsprocessingprocessrequirements,theanalysisshouldlimitthefreedomdegree,andaccordingtothesurfacefeaturesofpartspositioningelementselected,thenanalysistheselectedcomponentscanlimitshouldbethelimitofdegreesoffreedom.Determinethepositioningcomponentsalsoneedtoselectafterclampingdevice,thestructureofspecialfixtureisdeterminedintheend.KeywordsspindleboxProcessingtechnologyProcessSpecialfixture.主轴箱箱体工艺工装设计V目录摘要.................................................................................................................................................................IIIAbstract............................................................................................................................................................IV目录......................................................................................................................................................................V1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............................................................................................................................22零件的造型.......................................................................................................................................................33零件的分析.......................................................................................................................................................63.1零件的作用............................................................................................................................................63.2零件的工艺分析...................................................................................................................................73.2.1零件图样分析............................................................................................................................73.2.2工艺分析...................................................................................................................................84工艺规程设计.................................................................................................................................................104.1确定毛坯的制造形式.........................................................................................................................104.2定位基准的选择.................................................................................................................................114.2.1粗基准的选择.........................................................................................................................114.2.2精基准的选择.........................................................................................................................124.3拟定工艺路线.....................................................................................................................................134.3.1划分加工阶段.........................................................................................................................134.3.2安排加工顺序.........................................................................................................................134.3.3拟定加工工艺路线.................................................................................................................144.4机械加工余量、工序尺寸及毛坯尺寸的确定.................................................................................164.5确定切削用量及工时定额.................................................................................................................185专用夹具设计.................................................................................................................................................335.1问题的指出.........................................................................................................................................335.1.1机床夹具的作用.....................................................................................................................335.1.2铣床夹具的主要类型及结构形式.........................................................................................335.1.3机床夹具的组成.....................................................................................................................345.2夹具设计.............................................................................................................................................345.2.1夹具体设计..............................................................................................................................345.2.2定位基准的选择.....................................................................................................................345.2.3定位方案和元件设计.............................................................................................................345.2.4定位误差的计算.....................................................................................................................355.2.5铣削切削力计算.....................................................................................................................355.2.6夹紧机构的设计.....................................................................................................................365.2.7对刀装置.................................................................................................................................376结论与展望.....................................................................................................................................................386.1结论......................................................................................................................................................386.2不足之处及未来展望..........................................................................................................................38设计小结.............................................................................................................................................................39致谢.....................................................................................................................................................................40参考文献.............................................................................................................................................................41

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