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1、机床切削加工技术（Machiningtechnologyofmachinetool）NCprogrammingisthewholeprocessfromthepartsdrawingtotheNCprogram.Themaintaskistocalculatethetoolposition(cutterlocation)PointabbreviationCLpoint).Toolpointisusuallytakenastheintersectionpointbetweentoolaxisand
2、toolsurface,andthecutteraxisvectorisalsoneededinmultiaxismachining.ThedevelopmentofNCMachiningTechnologyClick:364,articleentrydate:2008-08-1117:57:41,source:www.picavr.com-------------------------------------------------------------------------------
3、-1.CNCmachiningtechnologydevelopmentprocessIn1949,theAmericanParsoncompanystartedcooperationwithMassachusettsInstituteofTechnology.Afterthreeyears,itdevelopedaCNCmillingmachineprototypewiththreeaxiscontrol,named"NumericalControl"".In1953,Massachusett
4、sInstituteofTechnologydevelopedanautomaticprogramminglanguagethatonlyneededtodeterminetheoutlineofthepartsandspecifythecuttingpathtogeneratetheNCprogram.TheUnitedStatesKeaney&Treckercompanysuccessfullydevelopedin1959withaknife,automatictoolexchange,a
5、fixturethatcanmaketheCNCmilling,drilling,boring,tappingandothermachiningfunction,thisisthenewtypesofCNCmachinetools,machiningcenter.In1968,theUnitedKingdomforthefirsttimeanumberofCNCmachinetools,unmannedhandlingcarsandautomaticwarehouseundercomputerc
6、ontroltoconnectautomaticprocessingsystem,whichisflexiblemanufacturingsystemFMS.In1974,microprocessorbegantobeusedinCNCsystemofmachinetools.Fromthenon,CNC(computernumericalcontrolsystem)softwireCNCtechnologydevelopedrapidlywiththedevelopmentofcomputer
7、technology.In1976,Lockheadbegantouseimageprogramming.TheuseofCAD(ComputerAidedDesign)drawthepartsoftheprocessingmodelonthedisplay"pointing"processedparts,processinputparametersrequiredbythecomputer,canautomaticallycalculatethetoolpath,machiningsimula
8、tion,NCprogram.DNC(directnumericalcontrol)technologybeganinthelate1960s.Itisageneralcomputer,directlycontrolandmanageagroupofCNCmachinetoolsandCNCmachiningcenter,formultivariety,multiprocessautomaticprocessing.DNCgroupcontroltechnologyisFMSbasedflexi
