会员注册 | 登录 | 微信快捷登录 支付宝快捷登录 QQ登录 微博登录 | 帮助中心 人人文库renrendoc.com美如初恋!
站内搜索 百度文库

热门搜索: 直缝焊接机 矿井提升机 循环球式转向器图纸 机器人手爪发展史 管道机器人dwg 动平衡试验台设计

   首页 人人文库网 > 资源分类 > DOC文档下载

外文翻译--现代设计与制造.doc

  • 资源星级:
  • 资源大小:44.00KB   全文页数:9页
  • 资源格式: DOC        下载权限:注册会员/VIP会员
您还没有登陆,请先登录。登陆后即可下载此文档。
  合作网站登录: 微信快捷登录 支付宝快捷登录   QQ登录   微博登录
友情提示
2:本站资源不支持迅雷下载,请使用浏览器直接下载(不支持QQ浏览器)
3:本站资源下载后的文档和图纸-无水印,预览文档经过压缩,下载后原文更清晰   

外文翻译--现代设计与制造.doc

ModernDesignandManufacturing1.TheComputerandManufacturingThecomputerisbringingmanufacturingintotheInformationAge.Thisnewtool,longafamiliaroneinbusinessandmanagementoperations,ismovingintothefactory,anditsadventischangingmanufacturingascertainlyasthesteamenginechangedit100yearsago.Thebasicmetalworkingprocessesarenotlikelytochangefundamentally,buttheirorganizationandcontroldefinitelywillInonerespect,manufacturingcouldbesaidtobecomingfullcircle.Thefistmanufacturingwasacottageindustrythedesignerwasalsothemanufacturer,conceivingandfabricatingproductsoneatatime.Eventually,theconceptoftheinterchangeabilityofpartswasdeveloped,productionwasseparatedintospecializedfunctions,andidenticalpartswereproducedthousandsatatime.Today,althoughthedesignerandmanufacturermaynotbecomeoneagain,thefunctionsarebeingdrawncloseinthemovementtowardanintegratedmanufacturingsystem.Itisperhapsironicthat,atatimewhenthemarketdemandsahighdegreeofproductdiversification,thenecessityforincreasingproductivityandreducingcoatsisdrivingmanufacturingtowardinegrationintoacoherentsystem,acontinuousprocessinwhichpartsdonotspentasmuchas95ofproductiontimebeingmovedaroundorwaitingtobeworkedon.Thecomputeristhekeytoeachofthesetwinrequirements.Itistheonlytoolthatcanprovidethequickreflexes,theflexibilityandseed,tomeetadiversifiedmarket.Anditistheonlytoolthatenablesthedetailedanalysisandtheaccessibilityofaccuratedatanecessaryfortheintegrationofthemanufacturingsystem.Itmaywellbethat,inthefuture,thecomputermaybeessentialtoacompanyssurvial.Manyoftodaysbusinesseswillfadeawaytobereplacedbymoreproductivecombinations.Suchmoreproductivecombinationsaresuperquality,superproductivityplants.Thegoalistodesignandoperateaplantthatwouldproduce100satisfactorypartswichgoodproductivity.Asophisticated,competitiveworldisrequiringthatmanufacturingbegintosettleformore,tobecomeitselfsophisticated.Tomeetcompetition,forexample,acompanywillhavetomeetthesomewhatconflictingdemandsforgreaterproductdiversification,higherquality,improvedproductivity,higherquality,improvedproductivityandprices.Thecompanythatseekstomeetthesedemandswillneedasophisticatedtool,onethatwillallowittorespondquicklytocustomerneedswhilegettingthemostoutofitsmanufacturingresources.Thecomputeristhattool.Becomingasuperquality,superproductivityplantrequirestheintegrationofanextremelycomplexsystem.Thiscanbeaccomplishedonlywhenallextremelycomplexsystem.Thiscanbeaccomplishedonlywhenallelementsofmanufacturingdesign,fabricationandassembly,qualityassurance,management,materialshandingarecomputerintegrated.Inproductdesign,forexample,interactivecomputeraideddesignCADsystemsallowthedrawingandanalysistaskstobeperformedinafractionofthetimeallowthedrawingandanalysistaskstobeperformedinafrationofthetimepreviouslyrequiredandgreateraccuracy.Andprogramsforprototypetestingtestingandevaluationfurtherspeedthedesignprocess.Inmanufacturingplanning,computeraidedprocessplanningpermitstheselection,fromthousandsofpossiblesequencesandschedules,oftheoptimumprocess.Ontheshopfloor,distributedintlligenceintheformofmicroprocessorscontrols,runsautomatedloadingandunloadingequipment,andcollectsdataoncurrentshopconditions.Butsuchisolatedrevolutionsarenotenough.Whatisnendedisatotallyautomatedsystem,linkedbycommonsoftwarefromfrontdoortoback.Thebenefitsrangethoughoutthesystem.Essentially,computerintegrationprovideswidelyandinstantaneouslyavailable,accurateinformation,improvingcommunicationbetweendepartments,permittingtightercontrol,andgenerallyenhancingtheoverallqualityandefficiencyoftheentiresystem.Improvedcommunicationcanmean,forexample,designsthataremoreproducible.TheNCprogrammerandthetooldesignerhaveachangtoinfluencetheproductdesigner,andviceversa.Engineeringchanges,canbereduced,andthosethatarerequiredcanbehandledmoreefficiently.Notonlydosethecomputerpermitthemtobespecicifiedmorequickly,butitalsoalerssubsequentusersofthedatatothefactthatachangehasbeenmade.Theinstantaneousupdatingofproductioncontroldatapermitsbetterplanningandmoreeffectivescheduling.Expensiveequipment,therefore,isusedmoreproductively,andpartsmovemoreefficientlythroughproduction,reducingworkinprocesscoats.Productquality,too,canbeimproved.Notonlyaremoreaccuratedesignsproduced,forexample,buttheuseofdesigndatabythequalityassurancedepartmenthelpseliminateerrorsduetomisunderstandings.Peopleareenabledtodotheirjobsbetter.Byeliminatingtediouscalculationsandpaperworknottomentiontimewastedsearchingforinformationthecomputernotonlyallowsworkerstobemoreproductivebutalsofreesthemtodowhatonlyhumanbeingcandothinkcreatively.Computerintegrationmayalsolurenewpeopleintomanufacturing.Peopleareattractedbecausetheywanttoworkinamodern,technologicallysophisticatedenviroment.Inmanufacturingengineering,CAD/CAMdecreasestooldesign,NCprogramming,andplanningtimeswhilespeedingtheresponserate,whichwilleventuallypermitinhousstafftoperformworkthatiscurrentlybeingcontractedout.2.CAD/CAMCAD/CAMisatermwhichmeanscomputeraidedandcomputeraidedmanufacturing.itisthetechnologyconcernedwiththeuseofdigitalcomputerstoperformcertainfunctionsindesignandproduction.Thistechnologyismovinginthedirectionofgreaterintegrationofdesignandmanufacturing,twoactivitieswhichhavetraditionallybeentreatedasdistinctandseparatefunctionsinaproductionfirm.Ultimately,CAD/CAMwillprovidethetechnologybaseforthecomputerintegratedfactoryofthefuture.ComputeraideddesignCADcanbedefinedastheuseofcomputerstytemstoassistinthecreation,modification,analysis,oroptimizationofadesign.Thecomputersystemsconsistofthehardwareandsoftwaretoperformthespecializeddesignfunctionsrequiredbytheparticularuserfirm.TheCADhardwaretypicallyincludedthecomputer,oneormoregraphicsdisplayterminals,keyboards,andotherperipheralequipment.TheCADsoftwareconsistsofthecomputerprogramstoimplementcomputergraphicstofacilitatetheengineeringfunctionsoftheusercompany.Examplesoftheseapplicationprogramsincludestressstrainanalysisofcomponents,dynamicresponseofmechanisms,heattransfercalculations,andnumericalcontrolpartprogrammingThecollectionofapplicationprogramswillvaryfromoneuserfirmtothenextbecausetheirproductlines,manufacturingprocesses,andcustomermarketsaredifferentThesefactorsgiverisetodifferencesinCADsystemrequirements.ComputeraidedmanufacturingCAMcanbedefinedastheuseofcomputersystemstoplan,manufacturingplantthrougheitherdirectorindirectcomputerinterfacewiththeplansproductionresources.Asindicatedbythedefinition,theapplicationsofcomputeraidedmanufacturingfallintotwobroadcategories1.Computermonitoringandcontrol.2.Manufacturingsupportapplications.Thedistinctionbetweenthetwocategoriesisfundamentaltoanunderstandingofcomputeraidedmanufacturing.Inadditiontotheapplicationsinvolvingadirectcomputerprocessinterfaceforthepurposeofprocessmonitoringandcontrol,computeraidedmanufacturingalsoincludesindirectapplicationsinwhichthecomputerservesasupportroleinthemanufacturingoperationsoftheplant.Intheseapplications,thecomputerisnotlinkeddirectlytothemanufacturingprocess.Instead,thecomputerisusedofflinetoprovideplans,schedules,forecasts,instructions,andinformationbywhichthefirmsproductionresourcescanbemanagedmoreeffectively.Theformoftherelationshipbetweenthecomputerandtheprocessisrepresentedsymbolicallyinthefiguregivenbelow.Dashedlinesareusedtoindicatethatthecommunicationandcontrollinkisanofflineconnection,withhumanbeingsoftenrequiredtoconsummatetheinerface.However,humanbeingsarepresentlyrequiredintheapplicationeithertoprovideinputtothecomputerprogramsortointerpretthecomputeroutputandimplementtherequiredaction.3.VoiceNCProgrammingVoiceprogrammingofNCmachinesabbreviatedVNCinvolvesvocalcommunicationofthemachiningproceduretoavoiceinputNCtapepreparationofthemachingproceduretoavoiceinputNCtapeprepartionsystem.VNCallowstheprogrammertoavoidstepssuchasOneoftheprincipalcompaniesspecializinginvoiceinputsystemsisThresholdTechnology,Inc,ofDelran,Newjersey.turn,ToperformthepartprogrammingprocesswithVNC,theoperatorspeaksintoaheadbandmicrophonedesignedtoreducebackgroundacousticalnoise.Communicationoftheprogramminginstructionsisinshoplanguagewithsuchterms

注意事项

本文(外文翻译--现代设计与制造.doc)为本站会员(英文资料库)主动上传,人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知人人文库网([email protected]),我们立即给予删除!

温馨提示:如果因为网速或其他原因下载失败请重新下载,重复下载不扣分。

copyright@ 2015-2017 人人文库网网站版权所有
苏ICP备12009002号-5