数控车床自动回转刀架英文文献以及翻译.doc

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1、Booleanoperationsfor3DsimulationofCNCmachiningofdrillingtoolsDaniTost*,AnnaPuig,Lluı´sPe´rez-VidalSoftwareDepartment,PolytechnicalUniversityofCatalonia,SpainAccepted25April2003AbstractThispaperaddressesthesimulationofdrillingtoolsCNCmachining.Itdescribesanovelapproachfort

2、hecomputationoftheboundaryrepresentationofthemachinedtools.MachiningconsistsofasequenceofBooleanoperationsofdifferencebetweenthetoolandthegrindingwheelsthroughtime.TheproposedmethodperformsthedynamicBooleanoperationsoncrosssectionsofthetoolanditreconstructsthe3Dmodelbytil

3、ingbetweenthecrosssections.Themethodisbasedonclassicalcomputationalgeometryalgorithmssuchasintersectiontests,hullcomputations,2DBooleanoperationsandsurfacetiling.Thisapproachisefficientanditprovidesusercontrolontheresolutionoftheoperations.AbstractThispaperaddressesthesim

4、ulationofdrillingtoolsCNCmachining.Itdescribesanovelapproachforthecomputationoftheboundaryrepresentationofthemachinedtools.MachiningconsistsofasequenceofBooleanoperationsofdifferencebetweenthetoolandthegrindingwheelsthroughtime.TheproposedmethodperformsthedynamicBooleanop

5、erationsoncrosssectionsofthetoolanditreconstructsthe3Dmodelbytilingbetweenthecrosssections.Themethodisbasedonclassicalcomputationalgeometryalgorithmssuchasintersectiontests,hullcomputations,2DBooleanoperationsandsurfacetiling.Thisapproachisefficientanditprovidesusercontro

6、lontheresolutionoftheoperations.q2003ElsevierLtd.Allrightsreserved.Keywords:CNCsimulations;Boresmachining;Computationalgeometry;Booleanoperations;Surfacetiling1.IntroductionMostoftheresearchonCNCinCADiscenteredontheautomaticcomputationoftoolpaths[5,13].Givenafinaltooldesi

7、gn,theoptimaltrajectoriesofthetoolandthegrindingwheelsmustbecomputedyieldingasfinalresulttheCNCcode.Machiningsimulationandverificationhasexactlytheoppositegoal:tocalculatethetoolstartingfromtheCNCcodeandfromageometricalmodelofthemachine,thewheelsandthetoolbeforemachining.

8、Thissimulationhasthreemainapplications[6].First,itdetectseventualcollisionsbetweenthetooloranyof