机械外文翻译--机械设计概述.doc机械外文翻译--机械设计概述.doc

收藏 分享

资源预览需要最新版本的Flash Player支持。
您尚未安装或版本过低,建议您

ANOVERVIEWOFMECHANICALDESIGNTHEFIRSTSTEPINTHEMANUFACTUREOFANYPRODUCTISDESIGNMECHANICALDESIGNISTHEAPPLICATIONOFSCIENCEANDTECHNOLOGYTODEVISENEWORIMPROVEDPRODUCTSFORTHEPURPOSEOFSATISFYINGHUMANNEEDSITISAVASTFIELDOFENGINEERINGTECHNOLOGYWHICHNOTONLYCONCERNSITSELFWITHTHEORIGINALCONCEPTIONOFTHEPRODUCTINTERMSOFITSSIZE,SHAPEANDCONSTRUCTIONDETAILS,BUTALSOCONSIDERSTHEVARIOUSFACTORSINVOLVEDINTHEMANUFACTURE,MARKETINGANDUSEOFTHEPRODUCTPEOPLEWHOPERFORMTHEVARIOUSFUNCTIONSOFMACHINEDESIGNARETYPICALLYCALLEDDESIGNERS,ORDESIGNENGINEERSMECHANICALDESIGNISACREATIVEACTIVITYHOWEVER,INADDITIONTOBEINGINNOVATIVE,ADESIGNENGINEERMUSTALSOHAVEASOLIDBACKGROUNDINTHEAREASOFMECHANICALDRAWING,KINEMATICS,DYNAMICS,MATERIALSENGINEERING,STRENGTHOFMATERIALSANDMANUFACTURINGPROCESSESHEREWETAKETHESELECTIONOFMATERIALSASANEXAMPLEDURINGRECENTYEARSTHESELECTIONOFENGINEERINGMATERIALSHASASSUMEDGREATIMPORTANCEMOREOVER,THEPROCESSSHOULDBEONEOFCONTINUALREEVALUATIONNEWMATERIALSOFTENBECOMEAVAILABLEANDTHEREMAYBEADECREASINGAVAILABILITYOFOTHERSCONCERNSREGARDINGENVIRONMENTPOLLUTION,RECYCLINGANDWORKERHEALTHANDSAFETYOFTENIMPOSENEWCONSTRAINTSTHEDESIREFORWEIGHTREDUCTIONORENERGYSAVINGSMAYDICTATETHEUSEOFDIFFERENTMATERIALSPRESSURESFROMDOMESTICANDINTERNATIONALCOMPETITION,INCREASEDSERVICEABILITYREQUIREMENTS,ANDCUSTOMERFEEDBACKMAYALLPROMOTEMATERIALSREEVALUATIONTHEEXTENTOFPRODUCTLIABILITYACTIONS,OFTENTHERESULTOFIMPROPERMATERIALUSE,HASHADAMARKEDIMPACTINADDITION,THEINTERDEPENDENCEBETWEENMATERIALANDTHEIRPROCESSINGHASBECOMEBETTERRECOGNIZEDTHEDEVELOPMENTOFNEWPROCESSESOFTENFORCESREEVALUATIONOFTHEMATERIALBEINGPROCESSEDTHEREFORE,ITISIMPERATIVETHATDESIGNANDMANUFACTURINGENGINEERSEXERCISECONSIDERABLECAREINSELECTING,SPECIFYING,ANDUTILIZINGMATERIALSIFTHEYARETOACHIEVESATISFACTORYRESULTSATREASONABLECOSTANDSTILLASSUREQUALITYINMECHANICSPROCESSING,MILLINGANDGRINDINGAREALWAYSUNDERTHECONSIDERATIONOFTHEDESIGNERSWITHTHEEXCEPTIONSOFTURNINGANDDRILLING,MILLINGISUNDOUBTEDLYTHEMOSTWIDELYUSEDMETHODOFREMOVINGMETALWELLSUITEDANDREADILYADAPTEDTOTHEECONOMICALPRODUCTIONOFANYQUANTITYOFPARTS,THEALMOSTUNLIMITEDVERSATILITYOFTHEMILLINGPROCESSMERITSTHEATTENTIONANDCONSIDERATIONOFDESIGNERSSERIOUSLYCONCERNEDWITHTHEMANUFACTUREOFTHEIRPRODUCTGRINDINGISONEOFTHEMOSTWIDELYUSEDMETHODSOFFINISHINGPARTSTOEXTREMELYCLOSETOLERANCESANDLOWSURFACEROUGHNESSCURRENTLY,THEREAREGRINDERSFORALMOSTEVERYTYPEOFGRINDINGOPERATIONPARTICULARDESIGNFEATURESOFAPARTDICTATETOALARGEDEGREETHETYPEOFGRINDINGMACHINEREQUIREDWHEREPROCESSINGCOSTSAREEXCESSIVE,PARTSREDESIGNEDTOUTILIZEALESSEXPENSIVE,HIGHEROUTPUTGRINDINGMETHODMAYBEWELLWORTHWHILEFOREXAMPLE,WHEREVERPOSSIBLETHEPRODUCTIONECONOMYOFCENTERLESSGRINDINGSHOULDBETAKENADVANTAGEOFBYPROPERDESIGNCONSIDERATIONALTHOUGHGRINDINGISUSUALLYCONSIDEREDAFINISHINGOPERATION,ITISOFTENEMPLOYEDASACOMPLETEMACHININGPROCESSONWORKWHICHCANBEGROUNDDOWNFORMROUGHCONDITIONWITHOUTBEINGTURNEDOROTHERWISEMACHINEDTHUSMANYTYPESOFFORGINGSANDOTHERPARTSAREFINISHEDCOMPLETELYWITHTHEGRINDINGWHEELATAPPRECIABLESAVINGSOFTIMEANDEXPENSEBESIDES,THEAPPLICATIONOFNONTRADITIONALMANUFACTURINGPROCESSESWILLBRINGMOREBOLDANDINNOVATIVEDESIGNTHECONVENTIONALMANUFACTURINGPROCESSESINUSETODAYFORMATERIALREMOVALPRIMARILYRELYONELECTRICMOTORSANDHARDTOOLMATERIALSTOPERFORMTASKSSUCHASSAWING,DRILLING,ANDBROACHINGCONVENTIONALFORMINGOPERATIONSAREPERFORMEDWITHTHEENERGYFROMELECTRICMOTORS,HYDRAULICS,ANDGRAVITYLIKEWISE,MATERIALJOININGISCONVENTIONALLYACCOMPLISHEDWITHTHERMALENERGYSOURCESSUCHASBURNINGGASESANDELECTRICARCSINCONTRAST,NONTRADITIONALMANUFACTURINGPROCESSESHARNESSENERGYSOURCESCONSIDEREDUNCONVENTIONALBYYESTERDAY’SSTANDARDSMATERIALREMOVALCANNOWBEACCOMPLISHEDWITHELECTROCHEMICALREACTIONS,HIGHVELOCITYJETSOFLIQUIDSANDABRASIVESMATERIALSTHATINTHEPASTHAVEBEENEXTREMELYDIFFICULTTOFORM,ARENOWFORMEDWITHMAGNETICFIELDS,EXPLOSIVES,ANDTHESHOCKWAVESFROMPOWERFULELECTRICSPARKSMATERIALJOININGCAPABILITIESHAVEBEENEXPANDEDWITHTHEUSEOFHIGHFREQUENCYSOUNDWAVESANDBEAMSOFELECTRONSINTHEPAST50YEARS,OVER20DIFFERENTNONTRADITIONALMANUFACTURINGPROCESSESHAVEBEENINVENTEDANDSUCCESSFULLYIMPLEMENTEDINTOPRODUCTIONTHEREASONTHEREARESUCHALARGENUMBEROFNONTRADITIONALPROCESSESISTHESAMEREASONTHEREARESUCHALARGENUMBEROFCONVENTIONALPROCESSES;EACHPROCESSHASITSOWNCHARACTERISTICATTRIBUTESANDLIMITATIONS,HENCENOONEPROCESSISBESTFORALLMANUFACTURINGSITUATIONSINOTHERCASES,NONTRADITIONALPROCESSESAREUSEDTOREDUCETHENUMBEROFREJECTSEXPERIENCEDBYTHEOLDMANUFACTURINGMETHODBYINCREASINGREPEATABILITY,REDUCINGINPROCESSBREAKAGEOFFRAGILEWORKPIECES,ORBYMINIMIZINGDETRIMENTALEFFECTSONWORKPIECEPROPERTIESASSTATEDPREVIOUSLY,THEPURPOSEOFMECHANICALDESIGNISTOPRODUCEAPRODUCTWHICHWILLSERVEANEEDFORMANINVENTIONS,DISCOVERYANDSCIENTIFICKNOWLEDGEBYTHEMSELVESDONOTNECESSARILYBENEFITPEOPLE;ONLYIFTHEYAREINCORPORATEDINTOADESIGNEDPRODUCTWILLABENEFITBEDERIVEDITSHOULDBERECOGNIZED,THEREFORE,THATAHUMANNEEDMUSTBEIDENTIFIEDBEFOREAPARTICULARPRODUCTISDESIGNEDMECHANICALDESIGNSHOULDBECONSIDEREDTOBEANOPPORTUNITYTOUSEINNOVATIVETALENTSTOENVISIONADESIGNOFAPRODUCT,TOANALYZETHESYSTEMANDTHENMAKESOUNDJUDGMENTSONHOWTHEPRODUCTISTOBEMANUFACTUREDITISIMPORTANTTOUNDERSTANDTHEFUNDAMENTALSOFENGINEERINGRATHERTHANMEMORIZEMEREFACTSANDEQUATIONSTHEREARENOFACTSOREQUATIONSWHICHALONECANBEUSEDTOPROVIDEALLTHECORRECTDECISIONSREQUIREDTOPRODUCEAGOODDESIGNONTHEOTHERHAND,ANYCALCULATIONSMADEMUSTBEDONEWITHTHEUTMOSTCAREANDPRECISIONGOODDESIGNREQUIRETRYINGNEWIDEASANDBEINGWILLINGTOTAKEACERTAINAMOUNTOFRISK,KNOWINGTHATIFTHENEWIDEANOTWORKTHEEXISTINGMETHODCANBEREINSTATEDTHUSADESIGNERMUSTHAVEPATIENCE,SINCETHEREISNOASSURANCEOFSUCCESSFORTHETIMEANDEFFORTEXPENDEDCREATINGACOMPLETELYNEWDESIGNGENERALLYREQUIRESTHATMANYOLDANDWELLESTABLISHEDMETHODSBETHRUSTASIDETHISISNOTEASYSINCEMANYPEOPLECLINGTOFAMILIARIDEAS,TECHNIQUESANDATTITUDESADESIGNENGINEERSHOULDCONSTANTLYSEARCHFORWAYSTOIMPROVEANEXISTINGPRODUCTANDMUSTDECIDEWHATOLD,PROVENCONCEPTSSHOULDBEUSEDANDWHATNEW,UNTRIEDIDEASSHOULDBEINCORPORATEDDURINGTHEBEGINNINGSTAGESOFDESIGN,CREATIVITYSHOULDBEALLOWEDTOFLOURISHWITHOUTAGREATNUMBEROFCONSTRAINTSEVENTHOUGHMANYIMPRACTICALIDEASMAYARISE,ITISUSUALLYEASYTOELIMINATETHEMINTHEEARLYSTAGESOFDESIGNBEFOREFIRMDETAILSAREREQUIREDBYMANUFACTURINGINTHISWAY,INNOVATIVEIDEASARENOTINHIBITEDQUITEOFTEN,MORETHANONEDESIGNISDEVELOPED,UPTOTHEPOINTWHERETHEYCANBECOMPAREDAGAINSTEACHOTHERITISENTIRELYPOSSIBLETHATTHEDESIGNWHICHISULTIMATELYACCEPTEDWILLUSEIDEASEXISTINGINONEOFTHEREJECTEDDESIGNSTHATDIDNOTSHOWASMUCHOVERALLPROMISEANOTHERIMPORTANTPOINTWHICHSHOULDBERECOGNIZEDISTHATADESIGNENGINEERMUSTBEABLETOCOMMUNICATEIDEASTOOTHERPEOPLEIFTHEYARETOBEINCORPORATEDINITIALLY,THEDESIGNERMUSTCOMMUNICATEAPRELIMINARYDESIGNTOGETMANAGEMENTAPPROVALTHISISUSUALLYDONEBYVERBALDISCUSSIONSINCONJUNCTIONWITHDRAWINGLAYOUTSANDWRITTENMATERIALTOCOMMUNICATEEFFECTIVELY,THEFOLLOWINGQUESTIONSMUSTBEANSWERED1DOESTHEDESIGNREALLYSERVEAHUMANNEED2WILLITBECOMPETITIVEWITHEXISTINGPRODUCTSOFRIVALCOMPANIES3ISITECONOMICALTOPRODUCE4CANITBEREADILYMAINTAINED5WILLITSELLANDMAKEAPROFITBESIDES,FORTHEPRODUCERSANDADMINISTRATIVEPERSONNELOFTHEPRODUCTS,MECHATRONICSHASMANYADVANTAGESASFOLLOWS1HIGHCAPITALEQUIPMENTUTILIZATIONTYPICALLY,THETHROUGHPUTFORASETOFMACHINESINAMECHATRONICSSYSTEMWILLBEUPTOTHREETIMESTHATFORTHESAMEMACHINESINASTANDALONEJOBSHOPENVIRONMENT2REDUCEDCAPITALEQUIPMENTCOSTSTHEHIGHUTILIZATIONOFEQUIPMENTRESULTSINTHENEEDFORFEWERMACHINESINTHEMECHATRONICSYSTEMTODOTHESAMEWORKASINACONVENTIONALSYSTEM3REDUCEDDIRECTLABORCOSTSSINCEEACHMACHINEISCOMPLETELYUNDERCOMPUTERCONTROL,FULLTIMEOVERSIGHTISNOTREQUIRED4REDUCEDWORKINPROCESSINVENTORYANDLEADTIMETHEREDUCTIONOFWORKINPROCESSINAISQUITEDRAMATICWHENCOMPAREDTOAJOBSHOPENVIRONMENT5RESPONSIVENESSTOCHANGINGPRODUCTIONREQUIREMENTSAMECHATRONICSYSTEMHASTHEINHERENTFLEXIBILITYTOMANUFACTUREDIFFERENTPRODUCTSASTHEDEMANDSOFTHEMARKETPLACECHANGEORASENGINEERINGDESIGNCHANGESAREINTRODUCED6ABILITYTOMAINTAINPRODUCTIONMANYMECHATRONICSYSTEMSAREDESIGNEDTODEGRADERATIONALLYWHENONEORMOREMACHINESFAIL7HIGHPRODUCTQUALITYSOMETIMES,ANOVERLOOKEDADVANTAGEOFAMECHATRONICSYSTEMESPECIALLYWHENCOMPAREDTOMACHINESTHATHAVENOTBEENFEDERATEDINTOACOOPERATIVESYSTEM,ISIMPROVEDPRODUCTQUALITY8OPERATIONALFLEXIBILITYOPERATIONALFLEXIBILITYOFFERSASIGNIFICANTOFPRODUCTIVITY9CAPACITYFLEXIBILITYWITHREASONABLEPLANNINGFORAVAILABLEFLOOR,AMECHATRONICSYSTEMINITIALLYCANBEDESIGNEDFORLOWPRODUCTION,ANDPROVIDENECESSARYADDITIONALPRODUCTIVITYASWELLONLYTIMEWILLPROVIDETHETRUEANSWERSTOTHEPRECEDINGQUESTIONS,BUTTHEPRODUCTSHOULDBEDESIGNED,MANUFACTUREDANDMARKEDONLYWITHINITIALAFFIRMATIVEANSWERSTHEDESIGNENGINEERALSOMUSTCOMMUNICATETHEFINALIZEDDESIGNTOMANUFACTURINGTHROUGHTHEUSEOFDETAILANDASSEMBLYDRAWINGSQUITEOFTEN,APROBLEMWILLOCCURDURINGTHEMANUFACTURINGCYCLEITMAYBETHATACHANGEISREQUIREDINTHEDIMENSIONINGORTOLERANCEOFPARTSOTHATITCANBEMOREREADILYPRODUCEDTHISFALLSINTHECATEGORYOFENGINEERINGCHANGESWHICHMUSTBEAPPROVEDBYTHEDESIGNENGINEERSOTHATTHEPRODUCTFUNCTIONWILLNOTBEADVERSELYAFFECTEDINOTHERCASES,ADEFICIENCYINTHEDESIGNMAYAPPEARDURINGASSEMBLYORTESTINGJUSTPRIORTOSHIPPINGTHESEREALITIESSIMPLYBEAROUTTHEFACTTHATDESIGNISALIVINGPROCESSTHEREISALWAYSABETTERWAYTODOITANDTHEDESIGNERSHOULDCONSTANTLYSTRIVETOWARDSFINDINGTHATBETTERWAYTHECOMPETENTENGINEERSHOULDNOTBEAFRAIDOFTHEPOSSIBILITYOFNOTSUCCEEDINGINAPRESENTATIONINFACT,OCCASIONALFAILURESHOULDBEEXPECTEDBECAUSEFAILUREORCRITICISMSEEMSTOACCOMPANYEVERYREALLYCREATIVEIDEATHEREISAGREATDEALTOBELEARNEDFORMAFAILUREANDTHEGREATESTGAINSAREOBTAINEDBYTHOSEWILLINGTORISKDEFEATINTHEFINALANALYSIS,THEREALFAILUREWOULDLIEINDECIDINGNOTTOMAKETHEPRESENTATIONATALL
编号:201311171446166699    类型:共享资源    大小:41.50KB    格式:DOC    上传时间:2013-11-17
  
5
关 键 词:
专业文献 学术论文 精品文档 机械外文
  人人文库网所有资源均是用户自行上传分享,仅供网友学习交流,未经上传用户书面授权,请勿作他用。
关于本文
本文标题:机械外文翻译--机械设计概述.doc
链接地址:http://www.renrendoc.com/p-96699.html

当前资源信息

4.0
 
(2人评价)
浏览:63次
淘宝运营上传于2013-11-17

官方联系方式

客服手机:17625900360   
2:不支持迅雷下载,请使用浏览器下载   
3:不支持QQ浏览器下载,请用其他浏览器   
4:下载后的文档和图纸-无水印   
5:文档经过压缩,下载后原文更清晰   

精品推荐

相关阅读

人人文库
关于我们 - 网站声明 - 网站地图 - 资源地图 - 友情链接 - 网站客服客服 - 联系我们

网站客服QQ:2846424093    人人文库上传用户QQ群:460291265   

[email protected] 2016-2018  renrendoc.com 网站版权所有   南天在线技术支持

经营许可证编号:苏ICP备12009002号-5