数控铣削中刀具磨损的可视化仿真技术研究

南京航空航天大学硕士学位论文数控铣削中刀具磨损的可视化仿真技术研究姓名：刘西卉申请学位级别：硕士专业：航空宇航制造工程指导教师：张臣2011-03I1.Dexel2.3.4.IIAbstractInrecentyears,withthedevelopmentofsimulationtechnologyofNCmillingprocess,simulationoftoolwearasanimportantresearchitemhasgainedmoreandmoreattention.Thispaperestablishedatoolwearmodelaccordingtomeasuredtoolwearbasedonmulti-axisNCmillingsimulationtechnology,andstudiedontoolwearsimulation.Themainachievementsareasfollows:1.Arapidsimulationmethodcalledlocalmodeltransformationformulti-axisNCmillingprocesswasdesignedinthispaper.InNCmillingsimulation,rapidtransformationforlocalareawascarriedoutduringtheprocessoftransformingDexelmodeltotrianglemeshmodeloftheworkpiece,whichprovidedthebasisofsimulationoftoolwear.2.Wearmodelformillingtoolwasestablishedinbasisofmillingparametersandtoolparameters.Radialtoolwearwasmeasuredbyshape-mappingmethod,andthemeasuringdatawereprocessedtogetflankwear.Coefficientsoftoolwearmodelwerefinallydeterminedaccordingtoflankwearandpartialleast-squaresregression.3.Millingcutterwasdispersedintotrianglemeshes,andBooleanoperationsbetweenthemillingcutterandworkpiecewerefinishedtoshowtoolwearconditiononthecuttertopredicttoolwearoff-lineaccordingtotoolwearmodel,basedonrapidsimulationmethodoflocalmodeltransformation.4.Amethodbasedoncoloredgraphicfortoolwearsimulationwasdeveloped,bywhichthedegreeoftoolwearfordifferentpositiononthetoolcanbeshown,andtoolwearconditioncanbeclearlyseenfromthegraphic.KeyWords:Multi-axisNCmillingmachining,Millingsimulation,Toolwearmeasurement,Toolwearmodeling,ToolwearsimulationV2.1CSG.........................................................................................................112.2Z-buffer.......................................................................................................122.3.........................................................................................132.4.................................................................................................132.5..................................................................................................142.6......................................................................................................142.7OpenGL...........................................................................................................153.1Dexel...............................................................................................................193.2.................................................................................................213.3.................................................................................................213.4.....................................................................................213.5.................................................................................233.6.................................................................233.7.............................................................................243.8.........................................................................................243.9Dexel.....................................................................................263.10DexelDexel............................................................273.11Dexel.............................................................................................283.12Dexel.....................................................................................................293.13................................................................................................313.14Dexel.............................................................323.15...........................................................333.16.......................................................................................................343.17...........................................354.1..........................................................................384.2.................................................................................................................394.3.............................................................................394.4.................................................................................414.5.....................................................................................414.612mm.........................................................................42VI4.716mm.........................................................................435.1.................................................................................................515.2.............................................................................................525.3.................................................................................................525.4.....................................................................................535.5.................................................................................................535.6....................................................................