绪论夹具在机械制造过程中运用广泛，指的是在整个制造工艺流程中发挥定位的功能，找准夹紧工件、确定工件与机床、刀具的相对位置的装置；此装置可以达到提升精度和效率的作用。现代社会中，科学技术作为第一生产力，始终保持高效飞速的发展；现代机械制造产业也随之不断提升到新的高度，而夹具作为机械产业的重要装置，也被大量运用到相应的加工操作中，如刀具制造、检测设备的制造、模具的选择和设计等等，这些制造过程都无法离开夹具，其重要作用可见一斑，可以说社会的进步依赖于科技的发展，科技的发展离不开制造业的创新和进步，而制造业飞跃的基石正是以夹具为代表的各种重要零件、装置的有机组合。故而，在制造过程中，夹具有着极为重要的作用。具体来说，在机械制造过程中，夹具既可以进行有机加工，同时也可以应用到装配与检验之中，其品质的高低将对加工质量、生产效率和制造成本产生本质影响。IntroductionThefixtureiswidelyusedintheprocessofmechanicalmanufacturing,whichreferstothefunctionofpositioninginthewholemanufacturingprocess,tofindtheclampingworkpiece,todeterminetherelativepositionoftheworkpieceandthetoolandtool,andtoachievetheeffectoftheliftingprecisionandefficiency.Inmodernsociety,asthefirstproductiveforce,scienceandtechnologyhavealwaysmaintainedhighspeedandrapiddevelopment,andthemodernmachinerymanufacturingindustryhasalsobeenpromotedtoanewheight.Asanimportantdeviceforthemechanicalindustry,thefixtureisalsowidelyusedinthecorrespondingprocessingoperations,suchastoolmanufacturing,testingequipmentmanufacturing,mold.Selectionanddesignandsoon,thesemanufacturingprocessescannotleavethefixture,itsimportantrolecanbeseen.Itcanbesaidthattheprogressofthesocietydependsonthedevelopmentofscienceandtechnology,thedevelopmentofscienceandtechnologycannotbeseparatedfromtheinnovationandprogressofthemanufacturingindustry,andthecornerstoneoftheleapofmanufacturingistheorganiccombinationofvariousimportantpartsanddevicesrepresentedbythefixture..Therefore,thefixtureplaysanimportantroleintheprocessequipmentofthemanufacturingprocess.Specifically,intheprocessofmechanicalmanufacturing,fixtureshouldbeusedintheprocessoforganicprocessing,welding,assemblyandinspection.Thequalityofthefixturewillhaveanessentialinfluenceonthequalityofprocessing,productionefficiencyandmanufacturingcost.目录一、镗孔夹具模型的概况和设计目的....................................................11、镗孔夹具模型的概况.......................................................................................12、镗孔夹具模型的设计目的...............................................................................3二、连杆零件主样件的确定....................................................................41、连杆零件的结构特征.......................................................................................42、连杆零件加工重点技术要求分析...................................................................5（1）大、小头孔的尺寸精度、形状精度....................................................................6（2）大、小头孔轴心线在两个互相垂直方向的平行度.............................................6（3）大、小头孔中心距................................................................................................6（4）连杆大头孔两端面对大头孔中心线的垂直度.....................................................6（5）大、小头孔两端面的技术要求.............................................................................7（6）螺栓孔的技术要求...................................................
