拨叉夹具设计说明书

II摘要随着科技的发展，机械制造行业已经是我国技术进步和社会发展的支柱产业之一。无论是传统产业，还是新兴的机械制造产业，都离不开形式各样的机械制造设备。本次毕业设计的内容主要内容就是对CA6140机床拨叉的工艺规程制定和对其中孔及若干平面加工工序的夹具设计进行研究和探讨。在工艺规程编制方面，主要通过仔细分析拨叉零件图和相关技术要求，查阅零件相关资料，考虑了零件的工艺结构要求、批量生产要求、经济性、可行性等多方面因素，最终安排工序，并完成加工，其中包括各道工序的加工方法，机床、刀具、夹具、辅具、量具的选择，基准面的选取，定位和夹紧方案的拟定，并将其编入工序卡片，清晰明了的表达出了整个加工过程。另外，在专用夹具设计方面，主要对一孔、一平面的加工工序进行了夹具方案的分析，计算和最终完成设计任务。关键词：拨叉；工艺路线；定位与夹紧；专用夹具设计IIIIAbstractWiththedevelopmentofscienceandtechnology,machinerymanufacturingindustryofChinahasbeentechnologicalprogressandsocialdevelopmentofpillarindustries.Whetherintraditionalindustriesornewindustries,itisinseparablefromawiderangeofmachineryandequipment.Thisgraduationofcontentwhichisthestudyabouttheprotocoldevelopmentprocessandthefixturedesignoftheholeandsomeplaneprocessingprocedure.Intermsofprocessrules,primarilythroughacarefulanalysisoftheproductpartsandrelatedtechnicalrequirements,checkthepartsrelevantinformationconsideredpartoftheprocessofstructuralrequirements,batch,andeconomics,feasibility,andmorefactors.Thefinalarrangementsfortheoperationstofinishprocessing,includingtheoperationsofprocessingmethod,machinetools,tooling,fixtures,assistivedevices,measurementapparatusselection,selectdatum,positioningandclampauthoring,andprocesscard,clarityofexpressionoutthewholeprocessingprocedure.Inaddition,infixturedesign,themaindesignaboutahole,aflatandagroovemachiningprocesshasbeenanalysised,computationandfinallytocompletethedesigntask.Keywords:Plectrum;processroute;positioningandclamping;dedicatedfixturedesign11目录摘要........................................................................................................IAbstract.....................................................................................................II第1章绪论.............................................................................................11.1夹具设计的意义...........................................................................31.2夹具设计研究概述.......................................................................41.2.1夹具的定义........................................................................41.2.2夹具发展概况....................................................................41.2.3夹具设计要解决的主要问题...............................................51.3夹具的功能..................................................................................61.4夹具组成.....................................................................................61.4.1夹具的基本组成部分..........................................................61.4.2夹具的其他组成部分..........................................................71.5夹具的分类..................................................................................71.5.1按夹具的通用特性分类......................................................71.5.2按夹具使用的机床分类......................................................71.6夹具使用优点..............................................................................91.7夹具设计要求..............................................................................91.7.1夹具设计基本要求.............................................................91.7.2生产对其提出的新要求....................................................101.8夹具设计特点............................................................................101.9现代夹具的发展发向..................................................................11第2章工艺规程的编制..........................................................................122.1零件的分析................................................................................122.1.1零件的作用......................................................................122.1.2零件的工艺分析...............................................................132.2确定毛坯的制造形式..................................................................142.3基面的选择................................................................................152.4制定工艺路线............................................................................162.5选择加工设备及刀具、夹具、量具............................................17222.6机械加工余量、工序尺寸及毛坯尺寸的确定..............................182.7确立切削用量及基本工时..........................................................21第3章工序70的夹具设计....................................................................393.1问题的提出.........................................................................393.2夹具设计............................................................................393.3定位误差的分析..................................................................423.4夹具设计及操作的简要说明................................................42第4章机床夹具优化设计及经济效益....................................................434.1优化设计分析..............................................................................434.1.1成组夹具成本.....................................................................434.1.2优化设计的现实意义.........................................................444.2机床夹具柔性化..........................................................................444.3机床夹具经济效益分析................................................................45结论.................................................................................