Using the orthogonal array with grey relational analysis to(7)

Using the orthogonal array with grey relational analysis to optimize the laser hybrid welding of a 6

Usingtheorthogonalarraywithgreyrelationalanalysis987

4CONCLUSIONS

ANd:YAGlaser–gasmetalarchybridwelding

experimentwasperformedwiththeexperimental

directionsdictatedbyanL18orthogonalarrayas

suggestedbyTaguchi.Theultimatetensilestrength

wasmeasuredinordertoevaluatetheweldability.

Agreyrelationalanalysisapproachwasadoptedto

optimizethehybridweldingperformancecharacter-

isticsintoasingleperformancecharacteristic,called

thegreyrelationalgrade.Thistechniquesimplifies

theoptimizationofcomplicatedperformancechar-

acteristics.Theanalyticalresultofthegreyrelational

analysisshowsanexcellentagreementwiththe

TaguchiDOEapproachandthemostsignificant

hybridweldingparametersarethelaserfocus,the

weldingwirefeedrate,andtheweldingwiretype.

Theexperimentalresultfortheoptimumsetting

givesmuchbetterweldingconditionsthanthe

preliminarysetting.

ACKNOWLEDGEMENT

Thisworkwassupportedbygrant10024116-2007-13

fromtheKoreaInstituteofIndustrialTechnology

EvaluationandPlanning(ITEP).

REFERENCES

1Magee,K.H.,Merchant,V.E.,andHyatt,ser

assistedgasmetalarcweldcharacteristics.InProceedings

oftheNinthInternationalCongressonApplicationsof

lasersandelectro-optics,Boston,1990,pp.382–399(Laser

InstituteofAmerica,Orlando,FL).

2Beyer,I.R.,Neuenhahn,J.,andBehler,K.Newaspects

inlaserweldingwithanincreasedefficiency.In

Proceedingsofthe13thInternationalCongressonApp-

licationsoflasersandelectro-optics,Orlando,1994,

pp.183–192(LaserInstituteofAmerica,Orlando,FL).3Dilthey,U.andWieschemann,A.Prospectsbycombin-ingandcouplinglaserbeamandarcweldingprocesses.InternationalInstituteofWelding,1999,IIWDoc.XII,1565–1599.4Ishide,T.,Tsubota,S.,andWatanabe,testMIG,TIGarc-YAGlaserhybridweldingsystemsforvariousweldingproducts.InProceedingsoftheFirstInterna-tionalSymposiumonHigh-powerlasermacroproces-sing,Taos,NM,2003,pp.347–352(SPIE,Bellingham,WA).5Bagger,C.andOlsen,serAppl.,2005,17(1),2–14.6Taguchi,G.Introductiontoqualityengineering,1990(AsianProductivityOrganization,Tokyo).7Ross,P.J.Taguchitechniquesforqualityengineering,1995(McGrawHill,NewYork).8Deng,J.Introductiontogreysystemtheory.J.GreySyst.,1989,1,1–24.9Deng,J.Acourseongreysystemtheory,1990(HuazhongUniversityPress,Wuhan).10Deng,J.Theessentialmethodsofgreysystems,1992(HuazhongUniversityPress,Wuhan).11Lin,J.L.andLin,C.L.Theuseoftheorthogonalarraywithgreyrelationalanalysistooptimizetheelectricaldischargemachiningprocesswithmultipleperfor-mancecharacteristics.Int.J.Mach.ToolsManuf.,2002,42,237–244.12Lin,J.L.andLin,C.L.Theuseofgrey-fuzzyfortheoptimizationofthemanufacturingprocess.J.Mater.Process.Technol.,2005,160,9–14.13Fung,C.P.Manufacturingprocessoptimizationforwearpropertyoffiber-reinforcedpolybutylenetereph-thalatecompositeswithgreyrelationalanalysis.Wear,2003,254,298–306.14AmericanWeldingSociety.Structuralweldingcode-aluminum,AWSD1.2/D1.2M,2003.15AmericanWeldingSociety.Specificationforbarealu-minumandaluminum-alloyweldingelectoredsandrods,AWSA5.10M.16Fisher,R.A.Statisticalmethodsforresearchworkers,1925(Oliver&Boyd,London).17Pan,L.K.,Wang,C.C.,Hsaio,Y.C.,andHo,K.C.OptimizationofNd:YAGlaserweldingontomagnesiumalloyviaTaguchianalysis.OpticsLaserTechnol.,2004,37,33–42.

JEM1070ÓIMechE2008Proc.IMechEVol.222PartB:J.EngineeringManufacture