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XZ25.50 变速箱箱体工艺规程、数控编程与组合夹具设计毕业论文.doc

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XZ25.50 变速箱箱体工艺规程、数控编程与组合夹具设计毕业论文.doc

I摘要在制造业信息化环境中,工艺设计是生产技术准备工作的第一步,工艺规程是进行工装设计制造和决定零件加工方法与加工路线的主要依据,它对组织生产、保证产品质量、提高劳动生产率、降低成本、缩短生产周期及改善劳动条件等都有直接的影响,是生产中的关键工作。工艺知识是制造企业中重要的知识资源之一,是使产品设计变为成品的整个制造过程中的基础资源,它对保证产品质量以及提高企业经济技术效益具有十分重要的作用。夹具的快速设计与制造,己经成为产品快速变换和制造系统新建成或重构后运行的瓶颈,严重地影响制造系统的设计建造周期、系统生产率、质量和成本。目前国内外使用的组合夹具是伴随着大批大量生产的发展而发展出现的,特别是和汽车工业的发展密切相关。组合夹具的使用,缩短了工序时间,降低了加工成本。因此,在何种生产条件下使用哪种类型的夹具才是经济合理的,也就是夹具的经济性,一直都是夹具结构发展和设计的一个主要问题。这次我毕业设计的课题就是制造业中XZ25.50的箱体加工工艺及加工中心、组合夹具设计和数控编程。关键字工艺加工中心组合夹具数控编程IIAbstractThemanufacturingindustrybecominganinformationbasedsocietyenvironment,theprocessplanningproducesisthefirststepinthetechnologypreparatorywork,theprocessplanningiscarriesontheworkclothesdesigntomakeandtodecidethecomponentsprocessingmethodwithprocessestheroutethemainbasis,itproduces,guaranteeproductquality,theenhancementlaborproductivitytotheorganization,reducesthecost,reducestheproductioncycleandtheimprovementworkconditionandsoonallhasthedirectinfluence,isintheproductionkeywork.Thecraftknowledgeismakesintheenterpriseoneofimportantknowledgeresources,iscausestheproductdesigntobecometheendproductintheentiremanufactureprocessfoundationresources,ittoguaranteedtheproductqualityaswellasenhancestheenterpriseeconomicaltechnologybenefittohavetheextremelyvitalrole.Thefastdesignandthemanufacture,oneselfafterbecomestheproductfasttransformationandthemanufacturesystemcompletesthebottlenecknewlywhichortheheavyconstructionmoves,seriouslyaffectsmanufacturesystemthedesignconstructioncycle,thesystemproductivity,thequalityandthecost.Atpresentthedomesticandforeignusesmodularfixturefollowslargequantitiesofmassproductionsdevelopmentbuttodevelopappears,speciallywithautomobileindustrydevelopmentclosecorrelation.Modularfixtureuse,reducedtheworkingproceduretime,reducedtheprocessingcost.Therefore,whichkindoftypeusesunderwhatkindofworkingconditionthejigistheeconomyreasonable,alsoisthejigefficiency,continuouslyallisthejigstructuredevelopmentandadesignmainquestion.TopicofthisstudyisinthemanufacturingindustryXZ25.50boxbodyprocessingcraftandmachiningcentersandthemodularfixturedesign,andthentheNCprogramming.KeywordsprocessplanningmachiningcentermodularfixtureNCprogrammingIIII目录序言1工艺分析..................................................................21.1零件的分析..........................................................................................................................21.1.1零件的功用...................................................................................................................21.1.2零件的工艺分析及技术要求.......................................................................................21.2零件的工艺规程设计..........................................................................................................51.2.1确定零件的生产类型...................................................................................................51.2.2确定零件的毛胚制造形式...........................................................................................51.2.3定位基准的选择...........................................................................................................51.2.4拟订工艺路线...............................................................................................................51.2.5毛坯余量与工序余量的确定.......................................................................................61.2.6确定主要表面的切削刀量及基本工时...................................72数控编程.................................................................252.1程序的编制........................................................................................................................252.1.1铣右端面.....................................................................................................................252.1.2铣左端面.....................................................................................................................262.1.3铣前端面.....................................................................................................................272.1.4铣削后端面.................................................................................................................282.1.5镗有端面的两孔.........................................................................................................292.1.6镗左端面的两孔.........................................................................................................302.1.7钻左平面上的个螺纹孔,通孔并攻丝.....................................................................312.1.8钻右平面上的螺纹孔,通孔及攻丝.........................................................................322.1.9钻前端面各螺纹孔及攻丝.........................................................................................342.1.10钻后端面上的各螺纹孔及攻丝...............................................................................352.2数控加工刀具卡................................................................................................................383组合夹具.................................................................393.1组合夹具及其应用特点....................................................................................................393.2夹具设计............................................................................................................................403.2.2基准的概念.................................................................................................................413.3工件的夹紧......................................................................................................................413.3.1夹紧的概念.................................................................................................................413.3.2夹紧力的大小.............................................................................................................423.3.3切削力的计算.............................................................................................................43

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