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ID:5928231
大小:33.50 KB
页数:4页
时间:2017-12-28
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1、IndustrialrobotsTherearevarietyofdefinitionsofthetermrobot.Dependingonthedefinitionused,thenumberofrobotinstallationsworldwidevarieswidely.Numeroussingle-purposemachinesareusedinmanufacturingplantsthatmightappeartoberobots.Thesemachinesarehardwriedtoperfo
2、rmasinglefunctionandcannotbereprogrammedtopreformadifferentfunction.Suchsingle-purposemachinesdonotfitthedefinitionforindustrialrobotsthatisbecomingwidelyaccepted.thisdefinitionwasdevelopedbytheRobotInstituteofAmerica.Arobotisareprogrammablemultifunctiona
3、lmainipulatordesignedtomovematerial,parts,tools,orspecializeddevicesthroughvariableprogrammedmotionsfortheperformanceofavarietyoftasks.Notethatthisdefinitioncontainsthewordsreprogrammableandmultifunctional.Itisthesetwocharacteristicsthatseparatethetureind
4、ustrialrobotfromthevarioussingle-purposemachinesusedinmodernmanufacturingfirms.Theterm“reprogrammable”impliestwothings:Therobotoperatesaccordingtoawrittenprogram,andthisprogramcanberewrittentoaccommodateavarietyofmanufactureingtasks.Theterm“multifunctiona
5、l”meansthattherobotcan,throughreprogrammingandtheuseofdifferentend-effectors,performanumberofdifferentmanufacturingtasks.Definitionswrittenaroundthesetwocriticalcharacteristicsarebecomingtheaccpteddefinitionsamongmanufacturingprofessionals.Thefirstarticul
6、atedarmcameaboutin1951andwasusedbytheU.S.AtomicEnergyCommission.In1954,thefirstprogrammablerobotwasdesignedbyGeorgeDevol.Itwasbasedontwoimportanttechnologies:(1)Numericalcontrol(NC)technology.(2)Romotemanipulatortechnology.Numericalcontorltechnologyprovid
7、edaformofmachinecontrolideallysuitedtorobots.Itallowedforthecontrolofmotionbystoredprograms.Theseprogramscontaindatepointstowhichthesequentiallymoves,timingsignalsinitiateactionandtostopmovement,andlogicstaementstoallowfordecisionmaking.Remotemanipulatort
8、echnologyallowedamachinetobemorethanjustanotherNCmachine.Itallowedsuchmachinestobecomerobotsthatcanperformavarietyofmanufacturingtasksinbothinaccessibleandunsafeenvironments.Bymergingthesetwotechnologies,Devoldevelo
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