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HeatTreatmentofDieandMouldOrientedConcurrentDesign
LIXiong,ZHANGHong-bing,RUANXue—yu,LUOZhong—hua,ZHANGYan
Abstract:
Manydisadvantagesexistinthetraditionaldiedesignmethodwhichbelongstoserialpattern.Itiswellknownthatheattreatmentishighlyimportanttothedies.Anewideaofconcurrentdesignforheattreatmentprocessofdieandmouldwasdevelopedinordertoovercometheexistentshortcomingsofheattreatmentprocess.HeattreatmentCAD/CAEwasintegratedwithconcurrentcircumstanceandtherelevantmodelwasbuilt.Theseinvestigationscanremarkablyimproveefficiency,reducecostandensurequalityofRandDforproducts.
Keywords:
diedesign;
heattreatment;
mould
Traditionaldieandmoulddesign,mainlybyexperienceorsemi—experience,isisolatedfrommanufacturingprocess.Beforethedesignisfinalized,theschemeofdieandmouldisusuallymodifiedtimeandagain,thussomedisadvantagescomeintobeing,suchaslongdevelopmentperiod,highcostanduncertainpracticaleffect.Duetostrongdesiresforprecision,servicelife,developmentperiodandcost,moderndieandmouldshouldbedesignedandmanufacturedperfectly.Thereforemoreandmoreadvancedtechnologiesandinnovationshavebeenapplied,forexample,concurrentengineering,agilemanufacturingvirtualmanufacturing,collaborativedesign,etc.
Heattreatmentofdieandmouldisasimportantasdesign,manufactureandassemblybecauseithasavitaleffectonmanufacture,assemblyandservicelife.Designandmanufactureofdieandmouldhaveprogressedrapidly,butheattreatmentlaggedseriouslybehindthem.Asdieandmouldindustrydevelops,heattreatmentmustensuredieandmouldtherearegoodstateofmanufacture,assemblyandwear—resistantpropertiesbyrequest.Impertinentheattreatmentcaninfluencedieandmouldmanufacturingsuchasover—hardand—softandassembly.Traditionallytheheattreatmentprocesswasmadeoutaccordingtothemethodsandpropertiesbroughtforwardbydesigner.Thiscouldmakethedesignersofdieandmouldandheattreatmentdivergefromeachother,forthedesignersofdieandmouldcouldnotfullyrealizeheattreatmentprocessandmaterialsproperties,andcontrarilythedesignersrarelyunderstoodtheserviceenvironmentanddesigningthought.Thesedivergenceswillimpacttheprogressofdieandmouldtoagreatextent.Accordingly,iftheprocessdesignofheattreatmentisconsideredintheearlydesigningstage,theaimsofshorteningdevelopmentperiod,reducingcostandstabilizingqualitywillbeachievedandthesublimationofdevelopmentpatternfromserialtoconcurrentwillberealized.
Concurrentengineeringtakescomputerintegrationsystemasacarrier,attheverystartsubsequenteachstageandfactorshavebeenconsideredsuchasmanufacturing,heattreating,propertiesandsoforthinordertoavoidtheerror.Theconcurrentpatternhasdismissedthedefectofserialpattern,whichbringaboutarevolutionagainstserialpattern.
Inthepresentwork.theheattreatmentwasintegratedintotheconcurrentcircumstanceofthedieandmoulddevelopment,andthesystemicandprofoundresearchwasperformed.
1HeatTreatmentUnderConcurrentCircumstance
Theconcurrentpatterndiffersultimatelyfromtheserialpattern(seeFig.1).Withregardtoserialpattern,thedesignersmostlyconsiderthestructureandfunctionofdieandmould,yethardlyconsidertheconsequentprocess,sothattheformermistakesareeasilyspreadbackwards.Meanwhile,thedesigndepartmentrarelycommunicateswiththeassembling,costaccountingandsalesdepartments.Theseproblemscertainlywillinfluencethedevelopmentprogressofdieandmouldandthemarketforeground.Whereasintheconcurrentpattern,therelationsamongdepartmentsareclose,therelateddepartmentsalltakepartinthedevelopmentprogressofdieandmouldandhavecloseintercommunionwithpurchasers.Thisispropitioustoeliminationoftheconflictsbetweendepartments,increasetheefficiencyandreducethecost.
Heattreatmentprocessintheconcurrentcircumstanceismadeoutnotafterblueprintandworkpiecetakenbutduringdieandmoulddesigning.Inthisway,itisfavorabletooptimizingtheheattreatmentprocessandmakingfulluseofthepotentialofthematerials.
2IntegrationofHeatTreatmentCAD/CAEforDieandMould
ItcanbeseenfromFig.2thattheprocessdesignandsimulationofheattreatmentarethecoreofintegrationframe.AfterinformationinputviaproductdesignmoduleandheattreatmentprocessgeneratedviaheattreatmentCADandheattreatmentCAEmodulewillautomaticallydividethemeshforpartsdrawing,simulationtemperaturefieldmicrostructureanalysisafterheat—treatmentandthedefectofpossibleemerging(suchasoverheat,overburning),andthentheheattreatmentprocessisjudgediftheoptimizatio