毕业设计中英文-模具设计与制造

毕业设计外文文献MOULDDESIGNANDMANUFACTURING模具设计与制造学生姓名学号系别机械工程与自动化系专业机械设计制造及其自动化指导教师2013年6月MOULDDESIGNANDMANUFACTURING模具设计与制造MOULDDESIGNANDMANUFACTURINGCADANDCAMAREWIDELYAPPLIEDINMOULDDESIGNANDMOULDMAKINGCADALLOWSYOUTODRAWAMODELONSCREEN,THENVIEWITFROMEVERYANGLEUSING3DANIMATIONANDFINALLY,TESTINGITBYINTRODUCINGVARIOUSPARAMETERSINTOTHEDIGITALSIMULATIONMODELSPRESSURE,TEMPERATURE,IMPACT,ETCCAM,ONTHEOTHERHAND,ALLOWSYOUTOCONTROLTHEMANUFACTURINGQUALITYTHEADVANTAGESOFTHESECOMPUTERTECHNOLOGIESARELEGIONSHORTERDESIGNTIMESMODIFICATIONSCANBEMADEATTHESPEEDOFTHECOMPUTER,LOWERCOST,FASTERMANUFACTURING,ETCTHISNEWAPPROACHALSOALLOWSSHORTERPRODUCTIONRUNS,ANDTOMAKELASTMINUTECHANGESTOTHEMOULDFORAPARTICULARPARTFINALLY,ALSO,THESENEWPROCESSESCANBEUSEDTOMAKECOMPLEXPARTSCOMPUTERAIDEDDESIGNCADOFMOULDTRADITIONALLY,THECREATIONOFDRAWINGSOFMOULDTOOLSHASBEENATIMECONSUMINGTASKTHATISNOTPARTOFTHECREATIVEPROCESSDRAWINGSAREANORGANIZATIONALNECESSITYRATHERTHANADESIREDPARTOFTHEPROCESSCOMPUTERAIDEDDESIGNCADMEANSUSINGTHECOMPUTERANDPERIPHERALDEVICESTOSIMPLIFYANDENHANCETHEDESIGNPROCESSCADSYSTEMSOFFERANEFFICIENTMEANSOFDESIGN,ANDCANBEUSEDTOCREATEINSPECTIONPROGRAMSWHENUSEDINCONJUNCTIONWITHCOORDINATEMEASURINGMACHINESANDOTHERINSPECTIONEQUIPMENTCADDATAALSOCANPLAYACRITICALROLEINSELECTINGPROCESSSEQUENCEACADSYSTEMCONSISTSOFTHREEBASICCOMPONENTSHARDWARE,SOFTWARE,USERSTHEHARDWARECOMPONENTSOFATYPICALCADSYSTEMINCLUDEAPROCESSOR,ASYSTEMDISPLAY,AKEYBOARD,ADIGITIZER,ANDAPLOTTERTHESOFTWARECOMPONENTOFACADSYSTEMCONSISTSOFTHEPROGRAMSWHICHALLOWITTOPERFORMDESIGNANDDRAFTINGFUNCTIONSTHEUSERISTHETOOLDESIGNERWHOUSESTHEHARDWAREANDSOFTWARETOPERFORMTHEDESIGNPROCESSBASEDONTHE3DDATAOFTHEPRODUCT,THECOREANDCAVITYHAVETOBEDESIGNEDFIRSTUSUALLYTHEDESIGNERBEGINSWITHAPRELIMINARYPARTDESIGN,WHICHMEANSTHEWORKAROUNDTHECOREANDTHECAVITYCOULDCHANGEMODERNCADSYSTEMSCANSUPPORTTHISWITHCALCULATINGASPLITLINEFORADEFINEDDRAFTDIRECTION,SPLITTINGTHEPARTINTHECOREANDCAVITYSIDEANDGENERATINGTHERUNOFFORSHUTOFFSURFACESAFTERTHECALCULATIONOFTHEOPTIMALDRAFTOFTHEPART,THEPOSITIONANDDIRECTIONOFTHECAVITY,SLIDESANDINSERTSHAVETOBEDEFINEDTHENINTHECONCEPTUALSTAGE,THEPOSITIONSANDTHEGEOMETRYOFTHEMOULDCOMPONENTSSUCHASSLIDES,EJECTIONSYSTEM,ETCAREROUGHLYDEFINEDWITHTHISINFORMATION,THESIZEANDTHICKNESSOFTHEPLATESCANBEDEFINEDANDTHECORRESPONDINGSTANDARDMOULDCANBECHOSENFROMTHESTANDARDCATALOGIFNOSTANDARDMOULDFITSTHESENEEDS,THESTANDARDMOULDTHATCOMESNEARESTTOTHEREQUIREMENTSISCHOSENANDCHANGEDACCORDINGLYBYADJUSTINGTHECONSTRAINTSANDPARAMETERSSOTHATANYNUMBEROFPLATESWITHANYSIZECANBEUSEDINTHEMOULDDETAILINGTHEFUNCTIONALCOMPONENTSANDADDINGTHESTANDARDCOMPONENTSCOMPLETETHEMOULDFIG231THISALLHAPPENSIN3DMOREOVER,THEMOULDSYSTEMPROVIDESFUNCTIONSFORTHECHECKING,MODIFYINGANDDETAILINGOFTHEPARTALREADYINTHISEARLYSTAGE,DRAWINGSANDBILLOFMATERIALSCANBECREATEDAUTOMATICALLYTHROUGHTHEUSEOF3DANDTHEINTELLIGENCEOFTHEMOULDDESIGNSYSTEM,TYPICAL2DMISTAKESSUCHASACOLLISIONBETWEENCOOLINGANDCOMPONENTS/CAVITIESORTHEWRONGPOSITIONOFAHOLECANBEELIMINATEDATTHEBEGINNINGATANYSTAGEABILLOFMATERIALSANDDRAWINGSCANBECREATEDALLOWINGTHEMATERIALTOBEORDEREDONTIMEANDALWAYSHAVINGANACTUALDOCUMENTTODISCUSSWITHTHECUSTOMERORABIDFORAMOULDBASEMANUFACTURERTHEUSEOFASPECIAL3DMOULDDESIGNSYSTEMCANSHORTENDEVELOPMENTCYCLES,IMPROVEMOULDQUALITY,ENHANCETEAMWORKANDFREETHEDESIGNERFROMTEDIOUSROUTINEWORKTHEECONOMICALSUCCESS,HOWEVER,ISHIGHLYDEPENDENTUPONTHEORGANIZATIONOFTHEWORKFLOWTHEDEVELOPMENTCYCLESCANBESHORTENEDONLYWHENORGANIZATIONALANDPERSONNELMEASURESARETAKENTHEPARTDESIGN,MOULDDESIGN,ELECTRICDESIGNANDMOULDMANUFACTURINGDEPARTMENTSHAVENOCONSISTENTLYWORKTOGETHERINATIGHTRELATIONSHIPCOMPUTERAIDEDMANUFACTURINGCAMOFMOULDONEWAYTOREDUCETHECOSTOFMANUFACTURINGANDREDUCELEADTIMEISBYSETTINGUPAMANUFACTURINGSYSTEMTHATUSESEQUIPMENTANDPERSONNELTOTHEIRFULLESTPOTENTIALTHEFOUNDATIONFORTHISTYPEOFMANUFACTURINGSYSTEMISTHEUSEOFCADDATATOHELPINMAKINGKEYPROCESSDECISIONSTHATULTIMATELYIMPROVEMACHININGPRECISIONANDREDUCENONPRODUCTIVETIMETHISISCALLEDASCOMPUTERAIDEDMANUFACTURINGCAMTHEOBJECTIVEOFCAMISTOPRODUCE,IFPOSSIBLE,SECTIONSOFAMOULDWITHOUTINTERMEDIATESTEPSBYINITIATINGMACHININGOPERATIONSFROMTHECOMPUTERWORKSTATIONWITHAGOODCAMSYSTEM,AUTOMATIONDOESNOTJUSTOCCURWITHININDIVIDUALFEATURESAUTOMATIONOFMACHININGPROCESSESALSOOCCURSBETWEENALLOFTHEFEATURESTHATMAKEUPAPART,RESULTINGINTOOLPATHOPTIMIZATIONASYOUCREATEFEATURES,THECAMSYSTEMCONSTRUCTSAPROCESSPLANFORYOUOPERATIONSAREORDEREDBASEDONASYSTEMANALYSISTOREDUCETOOLCHANGESANDTHENUMBEROFTOOLSUSEDONTHECAMSIDE,THETRENDISTOWARDNEWERTECHNOLOGIESANDPROCESSESSUCHASMILLINGTOSUPPORTTHEMANUFACTURINGOFHIGHPRECISIONINJECTIONMOULDSWITH3DSTRUCTURESANDHIGHSURFACEQUALITIESCAMSOFTWAREWILLCONTINUETOADDTOTHEDEPTHANDBREADTHOFTHEMACHININGINTELLIGENCEINHERENTINTHESOFTWAREUNTILTHECNCPROGRAMMINGPROCESSBECOMESCOMPLETELYAUTOMATICTHISISESPECIALLYTRUEFORADVANCEDMULTIFUNCTIONMACHINETOOLSTHATREQUIREAMOREFLEXIBLECOMBINATIONOFMACHININGOPERATIONSCAMSOFTWAREWILLCONTINUETOAUTOMATEMOREANDMOREOFMANUFACTURINGSREDUNDANTWORKTHATCANBEHANDLEDFASTERANDMOREACCURATELYBYCOMPUTERS,WHILERETAININGTHECONTROLTHATMACHINISTSNEEDWITHTHEEMPHASISINTHEMOULDMAKINGINDUSTRYT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，将零件分成模芯和型腔两侧，并生成出流表面和截流表面。在计算出零件的最佳设计草案后，再确定型腔、滑道和嵌件的位置和方向。然后在初步设计阶段，粗略地定出模具部件的位置和几何形状例如滑动装置、喷出系统等。有了这些信息，便可确定板的大小和厚度，并从产品标准目录中选取相应的标准模具。如果没有一个标准的模具能满足需要，则选择和要求最接近的标准模具并做相应修改通过调整限制和参数使得任意数量的任意尺寸的板子都能用于设计中。对功能部件进行细化，并加入标准部件完成整个模具的设计。这一切均在三维空间中进行。此外，模具系统还提供了对零件进行检查、修改和细化的功能。早在这个阶段，就可以自动生成图纸和材料清单了。通过运用模具设计系统的三维设计及功能，可在开始阶段就消除二维设计中的典型错误例如冷却系统和部件/型腔间的碰撞或孔的位置错误。在任何阶段都能生成材料和图纸的清单从而能够准确定购材料，并且总是具备实际的文件可用来与客户进行探讨，或者对模具基制造商来说总是能给出报价。一个特定的三维模具设计系统的使用能缩短研发周期，提高模具质量，增进团队合作，使设计人员从沉闷的日常工作中解脱出来。但是经济上的成功主要取决于工作流程的组织。只有采取了适当的组织方法和人员评估策略才能缩短研发周期。零件设计、模具设计、电气设计以及模具制造部门必须紧密合作，协同工作。模具的计算机辅助制造减少制造费用和研发周期的一个方法是建立能够充分发挥设备和人员潜能的制造系统。这类制造系统的基础是采用CAD数据来帮助对主要工艺做出决策，使得最终能够提高机器精度并减少不直接从事生产的时间。这就被称为计算机辅助制造（CAM）。CAM的目的是，如果可能的话，通过从计算机工作站启动机器运作，从而直接生产出模具断面而不需要经过中间步骤。对于一个好的CAM系统，自动化不仅仅体现在某个独立的细节上。加工工艺的自动化还体现在组成一个零件的各个侧面之间，最终导致方法路径的最优化。当你要生产多种特征时，CAM系统将为你构建一个工艺规划，它会在系统分析的基础上指定操作步骤以减少工具的变动以及所采用的工具的数目。在CAM方面，发展趋势是新技术和新工艺，例如微研磨，以支持带复杂三维结构和高表面质量的高精度注塑模具的制造。CAM软件将继续在软件本身固有的智能化加工的深度和广度上发展，直至计算机数值控制CNC编程工艺变成完全自动化。对于要求加工操作步骤能更灵活地组合在一起的先进的多功能加工工具来说尤其如此。CAM软件在保持机械师所需要的控制的同时，将继续使冗余的制造工艺逐渐自动化，使其通过计算机更快更精确地进行操作。在强调模具制造业在维持质量的同时还要以最高效的方式制造模具的今天，模具制造商们需要紧跟最新的软件技术包，以便使他们能够快速地规划并制造出复杂的模具，从而减少模具生产时间。简言之，模具制造业正朝着提高