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题目：专用镗床夹具设计班级：姓名：专业：机械设计指导教师：答辩日期：i专用镗床夹具设计摘要机床夹具是机械加工工艺系统的重要组成部分，是机械制造中的一项重要工艺装备。机床夹具在机械加工中起着重要的作用，它直接影响机械加工的质量、生产率和生产成本以及工人的劳动强度等。因此机床夹具设计是机械加工工艺准备中的一项重要工作。在专用夹具的设计中，根据设计任务主要就连杆、泵体的装用镗床夹具进行了设计，完成了对夹具用的定位件、导向件对刀件、导引件等夹具中用到的零件的设计，并用Soidworks进行了三维建模。夹具的设计，根据所设计出的工件外形及加工要求，设计出合适的夹具。考虑到泵体的外形较大，故应在选用夹具的定位件时使用支承板，而连杆的工件尺寸较小，但加工精度要高。本文设计的夹具，基本上可以满足工程需要，本文使用的设计方法，也可为同类夹具的设计提供参考。关键词：镗床夹具；SolidWorks；专用夹具；泵体；连杆iiDesignofSpecialBoringFixtureAbstractToolfixturemachiningprocessisanimportantcomponentofthesystemisanimportantmechanicalmanufacturingtechnologyandequipment.Toolfixtureinmachiningplaysanimportantrole,whichdirectlyaffectmachiningquality,productivityandproductioncostsandlaborintensityandsoon.Therefore,thedesignofjigsandfixturesmachiningprocessisanimportantworkinpreparation.Dedicatedfixturedesign,basedmainlyontheconnectingroddesigntask,thepump'sinstallationjigboringmachinehasbeendesignedwithcompletefixturewiththepositioningofparts,piecesofguidancedocumentsontheknife,guidancedocumentsandotherpartsusedinfixturesdesign,andconductedathree-dimensionalmodelingwithSoidworks.Fixturedesign,basedonthedesignoftheworkpieceshapeandprocessingrequirements,designasuitablefixture.Takingintoaccounttheshapeofalargerpump,itshouldbeintheselectionofthepositioningfixtureusedpartsbearingplates,andconnectingrodworkpiecesizesmaller,buthigherprecision.Thisfixturewasdesignedtobasicallymeettheengineeringneedsofthedesignusedinthismethodcanalsobedesignedforsimilarreferencefixture.KeyWords：boringfixture；SolidWorks；specialfixtures；pμmp；linkiii目录摘要.............................................................iAbstract...........................................................ii主要符号表.....................................................i1绪论...........................................................11.1研究的目的及意义.............................................11.2国内外的发展及研究状况.......................................11.3本课题研究的内容.............................................21.3.1研究内容...............................................21.3.2研究意义...............................................32镗床夹具设计的基本理论...........................................42.1夹具设计基本过程.............................................42.2镗床夹具的基本组成与设计特点.................................42.2.1镗床夹具的设计要点.....................................52.2.2镗床类夹具主要技术条件.................................72.2.3镗床规格和主要联系尺寸.................................82.2.4镗床类典型刀具.........................................92.3镗孔加工主要特点.............................................92.4连杆、泵体工件的典型结构....................................102.4.1连杆的零件结构分析....................................102.4.2泵体零件结构分析......................................112.5镗床夹具的典型结构分析......................................112.6工件在夹具中的定位..........................................123精镗连杆小头孔夹具设计...........................................133.1设计任务....................................................133.1.1连杆工艺分析..........................................133.1.2连杆的技术要求........................................133.2确定各表面的加工方案........................................143.2.1加工方案的拟定........................................143.2.2最优方案的确定........................................143.3连杆各工序加工余量和毛坯尺寸的确定..........................143.3.1毛坯的工艺要求........................................14iv3.3.2连杆的加工余量及毛坯尺寸的确定........................153.4连杆的夹具设计..............................................183.4.1定位基准的选择........................................183.4.2误差分析..............................................193.4.3夹具使用操作简介......................................193.5夹具结构设计................................................193.6夹紧机构设计................................................213.7夹具装配图..................................................224精镗连杆大头孔夹具...............................................234.1设计任务....................................................234.1.1连杆工艺分析..........................................234.1.2连杆的技术要求........................................244.2确定各表面的加工方案........................................244.2.1加工方案的拟定........................................244.2.2最优方案的确定........................................254.3连杆各工序加工余量和毛坯尺寸的确定..........................254.3.1毛坯的工艺要求........................................254.3.2连杆的加工余量及毛坯尺寸的确定........................254.4连杆的夹具设计..............................................284.4.1定位基准的选择........................................284.4.2切削力和夹紧力的计算..................................294.4.3.零件加工工艺过程......................................304.5夹具结构设计................................................304.5.1定位设计..............................................304.6其它元件设计................................................314.7夹具装配图..................................................315镗泵体两相垂直孔夹具.............................................325.1设计任务....................................................325.1.1泵体工艺分析..........................................325.1.2泵体的技术要求........................................335.2确定各表面的加工方案........................................335.2.1加工方案的拟定..........