中英文对照外文文献控制系统基础论文中英文资料外文翻译文献

《中英文对照外文文献控制系统基础论文中英文资料外文翻译文献》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。

1、中英文对照外文文献控制系统基础论文中英文资料外文翻译文献导读:就爱阅读网友为您分享以下“控制系统基础论文中英文资料外文翻译文献”资讯，希望对您有所帮助，感谢您对92to.com的支持!控制系统基础论文中英文资料外文翻译文献文献翻译原文：NumericalControlOneofthemostfundamentalconceptsintheareaofadvancedmanufacturingtechnologiesisnumericalcontrol(NC).Priortotheadventof

2、NC，allmachinetoolsweremanualoperatedandcontrolled.Amongthemanylimitationsassociatedwithmanualcontrolmachinetools,perhapsnoneismoreprominentthanthelimitationofoperatorskills.Withmanualcontrol,thequalityoftheproductisdirectlyrelatedtoandlimitedtotheski

3、llsoftheoperator•Numericalcontrolrepresentsthefirstmajorstepawayfromhumancontrolofmachinetools.Numericalcontrolmeansthecontrolofmachinetoolsandothermanufacturingsystemsthoughtheuseofprerecorded,writtensymbolicinstructions.Ratherthanoperatingamachinet

4、ool,anNCtechnicianwritesaprogramthatissuesoperationalinstructionstothemachinetool,Foramachinetooltobenumericallycontrolled，itmustbeinterfacedwithadeviceforacceptinganddecodingthep2ogrammedinstructions,knownasareader.Numericalcontrolwasdevelopedtoover

5、comethelimitationofhumanoperator，andithasdoneso・Numericalcontrolmachinesaremoreaccuratethanmanuallyoperatedmachines，theycanproducepartsmoreuniformly，theyarefaster,andthelong-runtoolingcostsarelower.ThedevelopmentofNCledtothedevelopmentofseveralotheri

6、nnovationsinmanufacturingtechnology:1.Electricaldischargemachining.2.Lasercutting.1.Electronbeamwelding.Numericalcontrolhasalsomademachinetoolsmoreversatilethantheirmanuallyoperatedpredecessors.AnNCmachinetoolcanautomaticallyproduceawidevarietyofpar4

7、s，eachinvolvinganassortmentofundertaketheproductionofproductsthatwouldnothavebeenfeasiblefromaneconomicperspectiveusingmanuallycontrolledmachinetoolsandprocesses.Likesomanyadvancedtechnologies，NCwasborninthelaboratoriesoftheMassachusettsInstituteofTe

8、chnology•TheconceptofNCwasdevelopedintheearly1950swithfundingprovidedbytheU.SAirForce.Initsearlieststages，NCmachineswereabletomakestraightcutsefficientlyandeffectively.However,curvedpathswereaproblembecausethemachinetoolhadtobeprogrammedtoundertakeas