中英文翻译--工业机器人-精品Word文档下载推荐.doc
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中英文翻译--工业机器人-精品Word文档下载推荐.doc
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Industrialrobots@#@Therearevarietyofdefinitionsofthetermrobot.Dependingonthedefinitionused,thenumberofrobotinstallationsworldwidevarieswidely.Numeroussingle-purposemachinesareusedinmanufacturingplantsthatmightappeartoberobots.Thesemachinesarehardwriedtoperformasinglefunctionandcannotbereprogrammedtopreformadifferentfunction.Suchsingle-purposemachinesdonotfitthedefinitionforindustrialrobotsthatisbecomingwidelyaccepted.thisdefinitionwasdevelopedbytheRobotInstituteofAmerica.@#@Arobotisareprogrammablemultifunctionalmainipulatordesignedtomovematerial,parts,tools,orspecializeddevicesthroughvariableprogrammedmotionsfortheperformanceofavarietyoftasks.@#@Notethatthisdefinitioncontainsthewordsreprogrammableandmultifunctional.Itisthesetwocharacteristicsthatseparatethetureindustrialrobotfromthevarioussingle-purposemachinesusedinmodernmanufacturingfirms.Theterm“reprogrammable”impliestwothings:
@#@Therobotoperatesaccordingtoawrittenprogram,andthisprogramcanberewrittentoaccommodateavarietyofmanufactureingtasks.@#@Theterm“multifunctional”meansthattherobotcan,throughreprogrammingandtheuseofdifferentend-effectors,performanumberofdifferentmanufacturingtasks.Definitionswrittenaroundthesetwocriticalcharacteristicsarebecomingtheaccpteddefinitionsamongmanufacturingprofessionals.@#@Thefirstarticulatedarmcameaboutin1951andwasusedbytheU.S.AtomicEnergyCommission.In1954,thefirstprogrammablerobotwasdesignedbyGeorgeDevol.Itwasbasedontwoimportanttechnologies:
@#@@#@
(1)Numericalcontrol(NC)technology.@#@
(2)Romotemanipulatortechnology.@#@Numericalcontorltechnologyprovidedaformofmachinecontrolideallysuitedtorobots.Itallowedforthecontrolofmotionbystoredprograms.Theseprogramscontaindatepointstowhichthesequentiallymoves,timingsignalsinitiateactionandtostopmovement,andlogicstaementstoallowfordecisionmaking.@#@RemotemanipulatortechnologyallowedamachinetobemorethanjustanotherNCmachine.Itallowedsuchmachinestobecomerobotsthatcanperformavarietyofmanufacturingtasksinbothinaccessibleandunsafeenvironments.Bymergingthesetwotechnologies,Devoldevelopedthefirstindustrialrobot,anunsophisticatedprogrammablematerialshandlingmachine.@#@Thefirstcommericallyproducedrobotwasdevelopedin1959.In1962,GeneralMotorsCorporation.ThisrobotwasproducedbyUnimation.Amajorstepforwordinrobotcontroloccurredin1973withthedevelopmentoftheT-3industrialrobotbyCincinnatiMilacron.TheT-3robotwasthefirstcommerciallyproducedindustrialrobotcontrolledbyaminicomputer.@#@Numericalcontrolandremotemanipulatortechnologypromptedthewide-scaledevelopmentanduseofindustrialrobots.Butmajortechnologicaldevelopmentsdonottakeplacesimplybecauseofsuchnewcapabilities.Somethingmustprovidetheimpetusfortakingadvantageofthesecapabilities.Inthecaseofindustrialrobots,theimpetuswaseconomics.@#@Therapidinflationofwagesexperiencedinthe1970stremendouslyincreasedthepersonnelcostsofmanufacturingfirms.Atthesametime,foreigncompetitionbecameaseriousproblemforU.S.manufacturers.Foreignmanufacturerswhohadundertakenautomationonawide-scalebasis,suchasthoseinJapan,begantogainanincreasinglylargeshareoftheU.S.andworldmarketformanufacturedgoods,particularlyautomobiles.@#@Throughavarietyofautomationtechniquesincludingrobots,Japanesemanufacturers,beginninginthe1970s,wereabletoproducebetterautomobilesmorecheaplythannonautomatedU.S.manufacturers.Consequently,inordertosurvive,U.S.manufacturerswereforcedtoconsideranytechnologicaldevelopmentsthatcouldhelpimproveproductivity.@#@Itbecameimperativetoproducebetterproductsatlowercostsinordertobecompetitivewithforeignmanufacturers.Otherfactorssuchastheneedtofindbetterwaysofperformingdangerousmanufacturingtaskscontributedtothedevelopmentofindustialrobots.However,theprincipalrationalehasalwaysbeen,andisstill,improvedproductivity.@#@Oneoftheprincipaladvantagesofrobotsisthattheycanbeusedinsettingsthataredangeroustohumans.Weldingandpartingareexamplesofapplicationswhererobotscanbeusedmoresafelythanhumans.Eventhoughrobotsarecloselyassociatedwithsafetyintheworkplace,theycan,inthemselves,bedangerous.@#@Robotsandrobotcellsmustbecarefullydesignedandconfiguredsothattheydonotendangerhumanworkersandothermachines.Robotworkenvelopsshouldbeaccuratelycalculatedandadangerzonesurroundingtheenvelopeclearlymarkedoff.Redflooringstripsandbarriescanbeusedtokeephumanworkersoutofarobot’sworkenvelope.@#@Evenwithsuchprecautio
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