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I摘要机械加工行业作为一个传统而富有活力的行业，近些年取得了突飞猛进的发展，在新经济时代，行业呈现了新的发展趋势，由此对其它的质量，性能要求有了新的变化。现在机械加工行业发生着结构性变化，工艺工装的设计与改良已成为企业生存和发展的必要条件，工艺工装的设计与改良将直接影响加工产品的质量与性能。首先介绍了气门摇臂轴支座的作用和工艺分析，其次确定毛坯尺寸，然后进行了工艺规程设计，最后进行夹具设计。通过对气门摇臂轴支座进行研究，来进行加工工艺和夹具设计，气门摇臂轴支座零件为铸件，具有体积小，零件结构简单的特点，由于面比孔容易加工，所以在制定工艺规程时，就采用先加工面，再以面为基准来加工孔的方法，其中各工序夹具都采用专用夹具，其机构设计简单，方便且能满足要求。关键词：气门摇臂轴支座；工艺分析；工艺规程设计；夹具设计IIAbstractMachiningindustry,asatraditionalandvibrantindustry,hasbeenrapidlydevelopedforafewpastdecades.Intheneweconomicarea,theindustrypresentedanewdevelopmenttrend,andthetrendsalsochangesthequalityandtheperformanceoftheproductioninsomenewabstracts.Machiningindustryisnowtakingplaceinstructuralchanges,processdesignandimprovementofequipmenthasbecomethenecessaryconditionsoftheenterprisesurvivalanddevelopment,processequipmentdesignandimprovedproductsdirectlyaffectthequalityandperformance.Thisarticleintroducestheroleandprocessanalysisofthevalverockerarmbearingsupport,followedbydeterminingblanksize,andthenproceedtoorderthedesignprocess,thefinalfixturedesign.WhatwillbedesignedisThemachiningprocessandfixturedesignoftheValveRockerArmBearingsupport,whichhasthecharacteristicsofthreeabstract.itscomponentsforcastings,withasmallsize,simplestructureandthecharacteristicsofparts,becausethesurfaceiseasierthantheeasyprocessing,pointoforderinthedevelopmentprocess,thesurfaceonthefirstprocessing,andthentosurfaceasabenchmarktootherprocessing,includingtheprocessesusedspecialfixture,anditsdesignissimple,convenientandcanmeettherequirements.Keywords:Valverockerarmbearingsupport;Processanalysis；Processdesign；FixturedesignIII目录摘要.....................................................................................................................IAbstract..................................................................................................................II第1章绪论........................................................................................................11.1本设计的内容及意义...........................................................................11.1.1课题设计的意义........................................................................11.1.2设计内容....................................................................................11.2课题背景知识.......................................................................................21.2.1零件作用....................................................................................21.2.2柴油机相关知识介绍................................................................31.2.3机械加工工艺相关知识............................................................51.2.4夹具的设计与作用......................................................................6第2章气门摇臂轴支座的机械加工工艺规程设计......................................102.1零件的工艺分析及生产类型的确定.................................................102.1.1零件的作用..............................................................................102.1.2零件的工艺分析......................................................................102.1.3确定零件的生产类型..............................................................112.2选择毛坯种类绘制毛坯图.................................................................122.2.1选择毛坯种类..........................................................................122.2.2确定毛坯尺寸及机械加工总余量..........................................132.2.3设计毛坯图..............................................................................142.2.4绘制毛坯图..............................................................................152.3选择加工方法，制定工艺路线.........................................................152.3.1定位基准的选择......................................................................152.3.2零件的表面加工方法的选择..................................................172.3.3加工阶段的划分......................................................................172.3.4工序的集中与分散..................................................................182.3.5工序顺序的安排......................................................................182.3.6确定工艺路线..........................................................................192.3.7加工设备及工艺装备选择......................................................20IV2.3.8工序间加工余量的确定..........................................................212.3.9切削用量以及基本时间定额的确定......................................22第3章气门摇臂轴支座零件专用夹具的设计..............................................373.1确定夹具的结构方案.........................................................................373.1.1确定定位方案，选择定位元件..............................................373.1.2确定导向装置..........................................................................393.1.3确定夹紧机构..........................................................................403.1.4确定辅助定位装置..................................................................413.2设计夹具体.........................................................................................42结论....................................................................................................................45致谢................................................................................................................