1、第1页附录DEVELOPMENTANDAPPLICATIONOFPLASTICSMOLDINGCAD/CAM/CAESYSTEMYuHuaKongZhenyuAdvancedManufacturingTechnologyCenter/HarbininstituteoftechnologyABSTRACT/thispaperdescribesfeaturesofplasticsmoldingCAD/CAM/CAEintegratedsystemandprocessofapplyingthesystemtopractice/DevelopmentandapplicationofI-DEAS(int
2、egrateddesignengineeringsoftware)wereperformedinviewofactualplasticsmolding/TheresultsshowthatplasticsmoldingCAD/CAM/CAEsystemisapracticalandefficienttechniquewhichisworthspreading/KEYWORDS/plasticsmoldingCAD/CAM/CAE；integrated；I-DEAS1/introductionPlasticsmoldingisthemainmethodofproducingplasticspro
3、duct/Itdevelopsinhighspeedbutitshistoryisshort/Plasticsmoldingisalsousedextensively/Accordingtothestatistics/thequantityofplasticsmoldingisabout28%ofthatofallmolding/butthetraditionaldesignofplasticsmoldingislowefficient/longperiodicandwasteful/Itcontradictswiththedevelopmentofplasticsindustry/Witht
4、hedevelopmentoftechniqueincomputer/numericalcontrolandplasticsfluid/plasticsmoldingCAD/CAM/CAEhasbeenappliedextensivelyatpresent2/plasticsMoldingCAD/CAM/CAEsystem2/1processofplasticsmoldingCAD/CAM/CAETheintegrationofCAD/CAM/CAEchangesthetraditionalmodeofproducingmolding/Fig/1showtheintegratedprocess
5、/第2页Intraditionaldesign/itisrequiredtoproduceactualsolidmoldingtoevaluatetheappearanceandtestthefunctionofproductwhentheproductconstructionisfinished/Bycontrast/inCAD/CAM/CAEsystem/byusingsolidgeometrymodelinguserscandisplaythepictureofproductvividlyongraphicterminal/evaluatetheappearanceandmodeling
6、technologythroughobservingthescreen/andneednotproduceactualsolidmodeling/ByusingfiniteFig1processofplasticsmoldingCAD/CAM/CAEElementmethodanalysissoftware/userscanalsotestthemechanicalfunctionsofproduct/ThemainfeatureofCAD/CAMsystemisthegenerationofacommondatabasewhichisusedforalldesignandmanufactur
7、ingactivities/soanotherfunctionofgeometrymodelingistoprovidegeometrydataforthefamiliesofplasticsanalysisandgraphicnumericalcontrol/hencetheredundant第3页dataisavoided/andtheefficiencyandprevisionareimproved/Threedimensionalgeometrysolidscanalsobeconvertedintotwodimensionalengineeringdrawing/sodesigner
8、wouldberelaxedfromdraftingandcalculating/concentratedoncreativework/Whenfinishingthepreliminarydesign/userscouldcheckthemoldingtechnologyandtheextentofmoldingconstructionbyusingCAEsoftware/thatistosay/usersshouldsimulatetheprocessofplasticsinjectionbeforethemoldingismanufactured/Throughtheanalysisof
9、CAEsoftware/allkindsofresultsaregottenineachphaseofplasticsinjection/suchastemperature/pressure/stress/fillingtime/coolingtime/warpageandshrinkage/etc/theseresultsarealsoshownwithabundantmodesofpostprocess/Userscanperformaquantitativeorqualitativeanalysis/Iftherearesomeproblem/thedesigncouldbecorrec
10、tincomputer/theinteractionisoperatedbetweenCADandCAEuntilthereasonableresultsaregotten/Notasthetraditionalprocess/themoldingwouldbemodifiedwhenithasbeenmanufacturedifsomethingiswrong/soprocessperiodishortendramatically/andefficiencyandprevisionareimproved/Wheninjectingsimulationisfinished/iftheresul
11、tsarereasonable/itshowsthedesignisapplicable/Thenextstepistofinishdetaildesignandmanufacturingtechnology/preparetomanufacture/Recently/thetechniqueofnumericalcontrol(NC)makesagreatprogress/Theautomaticallyprogrammedtool(APT)appearedin1960spromotedthedevelopmentofNCtechnologydramatically/APTisalsouse
12、dwidelyatpresent/butitalsohassomedefects/suchaslowefficiency/etc/atpresent/thedevelopmentorientationofNCistomergeCADandCAMintoanorganicwhole/soCAD/CAMisaunifiedsoftwaresystem/inwhichtheCADportionisinterfacedinsidethecomputerwiththeCAMsystem/Thereforethetrackofcuttingtooliscreatedwiththemodeofman-mac
13、hineinteractionbyusingthegeometrydatafullywhichiscreatedinthephaseofCAD/Nowanewprogrammingtechniquehasbeencomeintousinggraphicnumericalcontrol第4页(GNC)basedongraphic/Inthesystem/cuttingtool/workpieceandfixturearedisplayedoncomputerscreenbygeneratinganimation/sothetrackoftoolisoptimumandsafety/Insum/G
14、NCsystemisveryefficientandconvenient/2/2applicationofI-DEASsoftwareinpracticeOuradvancedmanufacturingtechnologycenter(AMMTEC)ofharbininstituteoftechnologymakesanefforttodevelopintegratedsystemofCAD/CAM/CAE/AMTECwasfoundedin1992/itimportedmanyNCmachinesandlargestyleengineeringsoftwareIDEAS(integrated
15、-designengineeringanalysissoftware)withwhichequipsIBM-RISC6000workstation/sowehavetheconditiontoapplyplasticsmoldingCAD/CAM/CAEsystemtodesign/analysisandmanufacturingofplasticsmolding/I-DEASisatypeofsyntheticallyautomaticsoftware/Itintegratesthefunctionsofdesign/drawing/engineeringanalysis/digitalsi
16、mulationofplasticsmolding/numericalcontrolprogrammingandtest/Thefamiliesofgeometrymodeling/plasticsanalysisandgraphicnumericalcontrolconstituteaplasticsmoldingCAD/CAM/CAEsystem/Wewoulddesignandmanufactureasetofmoldingwhichproducestheplasticpedalof“jetta”car(productmaterialisnylon-66)forthefirstAutom
17、obileWorkofcityofchangchun/Itisdifficultytodesignandmanufacturethemoldingbecausetheshapeofpedalisverycomplicated/sowedecidedtoapplythefamiliesofI-DEAStodesign/analysisandNCprogramming/I-DEASsolidmodelingisanimportantcomponentofI-DEAS/Itsuppliesasetoffunctionaltoolforgeometrymodelinganddetailmechanicaldesign/Themethodofsolidmodelingisconstructivesolidgeometry(CSG)/Thestepsareinfollowing/(1)creatingbasicelements/suchascubic/cylinder/sphere/etc/(2)disposingthebasicelementsbyusingBooleanoperation/Sothecomplicatedgeometrycanbecreated/Usingthesesteps/thethreedimensionalgeometrymodelingofpedalcanbe
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