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ID:50563699
大小:1.47 MB
页数:21页
时间:2020-03-11
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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
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