TOLERANCE BUDGETING IN A NOVEL小说中地宽容预算 微装配coarse-fine策略.pdf

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1、TOLERANCEBUDGETINGINANOVELCOARSE-FINESTRATEGYFORMICRO-ASSEMBLYVincentHennekenandMarcelTichemPrecisionManuicturingandAssembly,3mE,TUDew,Mekelweg2,2628CDDelff,TheNetherlandsAbstract:Thispaperpresentsthetolerancebudgetingforthecoarseassemblystepinanovelcoarse-finestrategyformicro-assembly.Thefin

2、alassemblystepistobeperformedusingMEMS-basedfimctionalitythatremainspartoftheproduct.Totaltolerancebuild-upduetothecoarseassemblyanddimensionalinaccuracieshasbeendeterminedforthealignmentofasinglemodeopticalfibretoalaserdiode,achallengingprobleminopticaltelecommunication.Keywords:tolerancebud

3、geting;product-internalassemblyfunctions;MEMStechnology;fibre-chipcoupling;siliconopticalbench(SiOB);mechanicalstop;fluidself-alignment.1.INTRODUCTIONThepurposeofthispaperistodiscusskeyissuesconcerningthecoarseassemblystepinanovelcoarse-finestrategyformicro-assembly,ofwhichthefeasibilityisbei

4、nginvestigatedinastructuredapproach.Theneedforreducingeffortrelatedtothehandlingofsmallpartsexplainstheideaforfocusingonquitedifferentmethodsforassembly'.Thisresearchfocusesontheinvestigationofthemethodofmicro-assemblybymeansofprodzrct-internalassemblyfunctions.Inthismethodassemblyfunctionali

5、tyiscreated,whichisintegratedwiththeproducttobeassembled,andwhichremainsaspartoftheproduct.Thisfunctionalityincludespartactuation,positionsensingandpartfreezing.Themethodisappliedinatwo-stageprocess.Inthefirststagecoarsepositioningofcomponentsisachievedusingproduct-externalassemblyfunctions,t

6、ypicallybya(semi)automaticproductionmachineorahumanoperator.Thefinal,accuratepositioningisperformed156VincentHennekenandMarcelTichemonbasisofproduct-internalassemblyfunctions.Overall,thisaimstoresultinlowertotalproductioncostand/orimprovedproductquality.MicroElectroMechanicalSystem(MEMS)techn

7、ologyhasbeenselectedforuseassupportingfabricationtechnology,becauseofthesmallattainablefeaturesizesandveryhighaccuracy,anditispotentiallylow-costduetoitspossibilityofbatch-wiseprocessing.ThepotentialuseofMEMS-basedstructuresforthepurposeofmic