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基于CAPP的XZ25.50箱体零件及专用夹具设计毕业论文.doc

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基于CAPP的XZ25.50箱体零件及专用夹具设计毕业论文.doc

图书分类号密级毕业设计基于CAPP的XZ25.50箱体工艺规程及专用夹具设计TECHNOLOGICALPROCEDUREOFTHEXZ25.50BOXBASEDONCAPPANDTHESPECIALFIXTUREDESIGN学生姓名学院名称机电工程学院专业名称机械设计制造及其自动化指导教师2008年6月2日徐州工程学院毕业设计I摘要这次我毕业设计的课题就是基于CAPP的箱体加工工艺及专用夹具设计。先针对箱体零件的特点设计工艺规程,再设计专用夹具,最后对箱体零件进行分类编码。CAPP是通过向计算机输入被加工零件的原始数据,加工条件和加工要求,由计算机自动地进行编码,编程直至最后输出经过优化的工艺规程卡片的过程。计算机辅助工艺规划常是联结计算机辅助设计CAD和计算机辅助制造CAM的桥梁。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。专用夹具的使用,一方面缩短了工序时间,降低了加工成本另一方面,夹具本身的设计制造工时、材料消耗等又增加了工件的成本。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。关键词CAPP工艺设计专用夹具徐州工程学院毕业设计IIAbstractThismyGraduationDesignisbasedontheCAPPXZ25.50boxoftechnologicalprocedureandSpecialfixturedesign.Firstdirecatedagainstthepeculiarityofthepartscasedesigntechnologicalprocedure,anddesignthespecialfixture,finallyclassificationcodingpartsbox.CAPP,throughtheimportationofcomputerpartswereprocessingtherawdata,processingconditionsandprocessingrequirements,carriedoutautomaticallybycomputercoding,programmingoptimizedoutputuntiltheendoftheprocessofordercardprocess.ComputeraidedprocessplanningisoftenlinkedcomputeraideddesignCADandcomputeraidedmanufacturingCAMasabridge.Themanufacturingindustrybecominganinformationbasedsocietyenvironment,theprocessplanningproducesisthefirststepinthetechnologypreparatorywork,theprocessplanningiscarriesontheworkclothesdesigntomakeandtodecidethecomponentsprocessingmethodwithprocessestheroutethemainbasis,itproduces,guaranteeproductquality,theenhancementlaborproductivitytotheorganization,reducesthecost,reducestheproductioncycleandtheimprovementworkconditionandsoonallhasthedirectinfluence,isintheproductionkeywork.Thecraftknowledgeismakesintheenterpriseoneofimportantknowledgeresources,iscausestheproductdesigntobecometheendproductintheentiremanufactureprocessfoundationresources,ittoguaranteedtheproductqualityaswellasenhancestheenterpriseeconomicaltechnologybenefittohavetheextremelyvitalrole.Thefastdesignandthemanufacture,oneselfafterbecomestheproductfasttransformationandthemanufacturesystemcompletesthebottlenecknewlywhichortheheavyconstructionmoves,seriouslyaffectsmanufacturesystemthedesignconstructioncycle,thesystemproductivity,thequalityandthecost.Unitclampuse,ontheonehandreducedtheworkingproceduretime,reducedtheprocessingcostOntheotherhand,thejigitselfdesignmanufacturemanhour,thematerialconsumptionandsoonincreasedtheworkpiececost.Therefore,whichkindoftypeusesunderwhatkindofworkingconditionthejigistheeconomyreasonable,alsoisthejigefficiency,continuouslyallisthejigstructuredevelopmentandadesignmainquestion.KeywordsCAPPProcessDesignSpecialFixtur徐州工程学院毕业设计III目录1绪论..............................................................................................................................................12零件加工工艺规程.....................................................................................................................32.1概述......................................................................................................................................32.2零件的作用..........................................................................................................................32.3零件的工艺分析.................................................................................................................32.4确定工艺方案的原则及注意问题......................................................................................32.4.1粗、精加工分开原则...................................................................................................32.4.2工序集中与分散的原则...............................................................................................42.4.3制定工艺方案应注意的其它问题...............................................................................52.5工艺规程的设计..................................................................................................................52.5.1确定毛坯材料及尺寸...................................................................................................52.5.2定位基准的选择...........................................................................................................52.5.3制定工艺路线...............................................................................................................62.6工序尺寸的基本要求..........................................................................................................72.7确定切削用量和基本工时.................................................................................................82.8切削用量的选择依据.......................................................................................................222.8.1铣削.............................................................................................................................222.8.2钻孔.............................................................................................................................222.8.3扩孔和铰孔.................................................................................................................232.8.机床精度及机床参数....................................................................................................232.9各种加工工艺和加工方法...............................................................................................242.9.1平面加工工艺.............................................................................................................242.9.3螺纹加工工艺.............................................................................................................242.10常用工艺主要工序能达到的精度和表面粗糙度..........................................................242.10.1平面加工...................................................................................................................242.10.2螺纹孔加工...............................................................................................................253专用夹具的设计.......................................................................................................................263.1对铣床夹具体的要求.......................................................................................................263.2夹具体的毛坯结构...........................................................................................................263.3夹具元件的选择与设计....................................................................................................263.4专用夹具的设计步骤.......................................................................................................273.5绘制夹具总装配图...........................................................................................................27

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