夹具设计外文翻译---采用遗传算法优化加工夹具定位和加紧位置.docx

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1、附录MachiningfixturelocatingandclampingpositionoptimizationusinggeneticalgorithmsNecmettinKaya*DepartmentofMechanicalEngineering,UludagUniversity,Go¨ru¨kle,Bursa16059,TurkeyReceived8July2004;accepted26May2005Availableonline6September2005AbstractDeformationoftheworkpiecemaycausedime

2、nsionalproblemsinmachining.Supportsandlocatorsareusedinordertoreducetheerrorcausedbyelasticdeformationoftheworkpiece.Theoptimizationofsupport,locatorandclamplocationsisacriticalproblemtominimizethegeometricerrorinworkpiecemachining.Inthispaper,theapplicationofgeneticalgorithms(GA

3、s)tothefixturelayoutoptimizationispresentedtohandlefixturelayoutoptimizationproblem.Ageneticalgorithmbasedapproachisdevelopedtooptimisefixturelayoutthroughintegratingafiniteelementcoderunninginbatchmodetocomputetheobjectivefunctionvaluesforeachgeneration.Casestudiesaregiventoillu

4、stratetheapplicationofproposedapproach.Chromosomelibraryapproachisusedtodecreasethetotalsolutiontime.DevelopedGAkeepstrackofpreviouslyanalyzeddesigns;thereforethenumbersoffunctionevaluationsaredecreasedabout93%.Theresultsofthisapproachshowthatthefixturelayoutoptimizationproblemsa

5、remulti-modalproblems.Optimizeddesignsdonothaveanyapparentsimilaritiesalthoughtheyprovideverysimilarperformances.Keywords:Fixturedesign;Geneticalgorithms;Optimization1.IntroductionFixturesareusedtolocateandconstrainaworkpieceduringamachiningoperation,minimizingworkpieceandfixture

6、toolingdeflectionsduetoclampingandcuttingforcesarecriticaltoensuringaccuracyofthemachiningoperation.Traditionally,machiningfixturesaredesignedandmanufacturedthroughtrial-and-error,whichprovetobebothexpensiveandtime-consumingtothemanufacturingprocess.Toensureaworkpieceismanufactur

7、edaccordingtospecifieddimensionsandtolerances,itmustbeappropriatelylocatedandclamped,makingitimperativetodeveloptoolsthatwilleliminatecostlyandtime-consumingtrial-and-errordesigns.Properworkpiecelocationandfixturedesignarecrucialtoproductqualityintermsofprecision,accuracyandfinis

8、hofthemachinedpart.Theoretically,the3-2-