焊接学报 梁志芳, 史清宇, 康旭 试验方法 分析与讨论 TRANSACTIONSOFTHECHINAWELDINGINSTITUTION. Vol. No. February 年 月. (frictionstirweld, FSW) (TWI), mm, FSW, GB/T WDW.

Transkript

1 第 卷第 期 年 月 焊接学报 TRANSACTIONSOFTHECHINAWELDINGINSTITUTION Vol. No. February A, 梁志芳, 史清宇, 康旭 (.,., ; ) :, A,,, n, v d eta,, n/v.,. MPa. : ; ; :TG :A : - X( ) - - 梁志芳 序 言 (frictionstirweld, FSW) (TWI),, [ -]. ( ),,, FSW. FSW, ( ) [,, - ]. A,,,,. 试验方法 A, (, %)Fe., Si., : - - Mn., Cu., Mg., Ni., Cr., Zn., Ti., Zr., Al; mm mm mm. FSW, a FSW, b. mm,, mm.,.., s. ( ) ~ r/min(,,,,,,,,,,, ); ~ mm/min(,,,,,,,,,, );. ~. mm(.,.,.,.,.,. ),.. GB/T,,,. WDW. 分析与讨论, Prob(>F)<., Prob( t)<., :

2 焊接学报第 卷 Fig. Tensiletestofspecimen R m =-. +. lnn-. v-. n/v +. d eta -. d eta ( ) :R m FSW ;n ;v ;d eta.. Table Regressionanalysisresultsofmodel F Prob>F... <.... Table ( ), n, v d eta, n/v.. Regressionanalysisresultsofitemsinmodel ( ) n : R m =. -. n n v ( ) / lnn/ln(r min - ) v/(mm min - ) n/v(r mm - ) d eta /mm d eta /mm t Prob> t <. <. <. <..., FSW,. v, n (. v), n ;

3 第 期梁志芳, 等 : A 铝合金搅拌摩擦焊工艺优化 n (. v),. Sato [ ], FSW,,,..,, ;,.,,. A, FSW ( ), η (MgZn ) τ (Al Mg Zn ),,.,. Mishra [ ],.,,.,.. ( ) v R m. n =-. + ( ) v v, FSW,. n, v, ; v (. n), v..cavaliere [ ],, ( ) ( ).,,.,.,..,,... ( ) d eta : R m d eta d eta ( ), d eta, ; d eta (. ), d eta. [ ] :.,,,,.,,,.,.,,,,,,,,.. ( ), ( ), ( ),, v =. mm/min, n=. r/min, d eta =. mm.,, ( ),. Table n/(r min - ) Optimizedweldingparametersandjointtensile strength v/(mm min - ) d eta /mm R m /MPa..., FSW. MPa, ( ).. ( ) FSW. 结 论 ( ) mm A FSW, n v

4 焊接学报第 卷 n/v. ( ) n, v d eta,. ( )n= r/min, v= mm/min, d eta =. mm,. MPa. : [ ] SatoYS, UrataM, KokawaH, etal.hal-petchrelationshipin frictionstirweldsofequalchannelangular-presedaluminiumalloys[ J].MaterialsScienceandEngineringA, ( ): -. [ ] CavaliereP, SquilaceA, PanelaF.EfectofweldingparametersonmechanicalandmicrostructuralpropertiesofAA oints producedbyfrictionstirwelding[ J].JournalofMaterialsProcesingTechnology, ( ): -. [ ] MishraR S, MaZY.Frictionstirweldingandprocesing[ J]. MaterialsScienceandEngineringR, ( ): -. [ ] GueraM, SchmidtC, McClureJC, etal.flowpaternsduring frictionstirwelding[ J].MaterialsCharacterization, ( ): -. [ ] GharachehM A, KokabiAH, DaneshiG H, etal.theinfluenceoftheratioof rotationalspeed/traversesped (ω/v)on mechanicalpropertiesofaz frictionstirwelds[ J].InernationalJournalofMachineToolsandManufacture, ( ): -. [ ] SutonM A, YangB, ReynoldsAP, etal.microstructuralstudiesoffrictionstirweldsin -T aluminum[ J].Materials ScienceandEngineeringA, ( ): -. [ ] WangKS, ShenY, YangXR, etal.evaluationofmicrostructureandmechanicalpropertyoffsw weldedmb magnesiumalloy[ J].JournalofIronandStelResearchInternational,, ( ): -. [ ],,. A [ J].,, ( ): -. ZhangPing, WangWeixin, ZhaoJunjun.Characteristicanalysis forfrictionstirweldingof A aluminum aloy[ J].Ordnance MaterialScienceandEngineering,, ( ): -. [ ] JataK V, SemiatinSL.Continuousdynamicrecrystalization duringfrictionstirweldingofhighstrengthaluminumaloys[ D]. ScriptaMaterial,, ( ): -. [ ]. [ D]. :.. :,,,,... brainliang@ ncist. edu.cn

5 Ⅱ MAINTOPICS, ABSTRACTS KEYWORDS, Vol., No. namicimpedance Frictionstir welding processparameter optimization of A aluminum aloy LIANG Zhifang,, SHIQingyu, KANGXu (.DepartmentofMechanicalEngineering, Tsinghua University, Beijing, China;.DepartmentofMechanical ElectricalEngineering, NorthChinaInstituteofScience Technology, Beijing, China).p - Abstract: Thejointstrengthoffrictionstirweldingisan importantindicatorofperformance.throughdiferentcombinationsofweldingparameterssuchastoolrotationrate, tooltraversespeedandtargetdepth, frictionstirweldedtestplatesof A aluminumaloyareprepared.thetensilestrengthofweldedjointsofthetestplatesisdetectedbytensiletest.theregresionmodelbetweenthetensilestrengthofweldedjointsand weldingprocesparametersisestablished.whenthetoolrotation raten, thetooltraversespeedvorthetargetdepthdetaindividualychanges, thereisapeakofjointtensilestrength.thetool rotationrateandthetooltraversespeedinteractivelyimpactthe tensilestrengthbymeansofn/v.itisprovedthattheoptimized weldingparameterscan makejointtensilestrength be up to. MPa. Keywords: frictionstirwelding;tensilestrength;weldingprocesparameter Numericalsimulation on stainlessteelspotwelding process SUN Fangfang, LIMengsheng, WANG Yang, ZHAO Ying (SchoolofMaterialsScience and Engineering, HefeiUniversityofTechnology, Hefei, China).p - Abstract: Temperatureandresidualstresfieldof stainlesssteelspotweldingprocesweresimulatedbyansysfiniteelementsoftware.thecharacteristicsofspotheatingand coolingandthetemperaturedistributionwereanalyzed, andthe diversificationanddistributionofstreswerediscussed.theresultsshow thatwith spotweldingheating, symmetricalelipse nuggetgradualyformsalongthejointsurface, andcompressive stresismainlyinthenugget;atcoolingmoment, theisotherm ofweldingareareduceswiththeshapeofelipse, andthestress innuggettransformstotensilestres.theactualnuggetsizesof spotweldingjointsaremeasuredtoverifythatthesimulationresultsareaccurateandreliable. Keywords: numericalsimulation; stainlesssteel; temperaturefield;stresfield Modefornearsurfacedefectdetectionbasedonultrasonic TOFD CHIDazhao,, GANGTie, YAOYingxue, YUAN Yuan, SHENGChaoyang (.StateKeyLaboratoryofAdvanced WeldingProductionTechnology, HarbinInstituteofTechnology, Harbin, China;.SchoolofMechatronicsEnginering, HarbinInstituteofTechnology, Harbin, China).p - Abstract: Aimsattheproblemofnearsurfacedeadzone inultrasonictofd(timeofflightdifraction)method, amodifiedtestingmodenamedastofdw, whichemploysthethree- foldreflectedlongitudinalwavefromthebotomofthepieceun- dertesting, ispresentedbasedontheconventionaltofdtechnique.thecharacteristicofsoundpropagationintofdw mode isanalyzedanditsdetectionprincipleisilustrated.throughartificialdefecttesting, thefeaturesoftestedsignalandimageare cognized, andthetestingsensitivityandaccuracyofthetesting modearestudied.weldpieceistestedandtheresultisverified by destructive testing. The experimentalresults show that TOFDW modelcanidentifythenearsurfacedefectthatcannotbe distinguishedbyusingconventionalmethods, andtheartificial defectwithburieddepthof. mmcanbeefectivelydetected. Themodelhasahighquantitativeaccuracy, andtheaverageabsoluteerorofartificialdefectslocationislesthan. mm. Keywords: ultrasonictofd;nearsurfacedeadzone; defectdetection Real-timevisualdetectionofweldingpoolindouble-electrodeMIG welding SHIYu, WANG Haitao, XUE Cheng, LIUXiaotian (.StateKeyLaboratoryofGansuAdvanced Non-FerousMetalMaterials, Lanzhou University of Technology, Lanzhou, China;. KeyLaboratory of Non-FerousMetalAloysandProcessingofMinistryofEducation, LanzhouUniversityofTechnology, Lanzhou, China).p - Abstract: Aneficientbypassarcweldingmethod was presented.byemployingcommonccd camerawithcomposite filterglass, theclearimageofweldingpoolwascapturedunder theconditionofcontinuoushighcurent.withdigitalgraphic processingtechnique, imageswereprocessed in realtimeby IMAQmoduleofLabview.Thebestmorphologicalprocesingap- poolcanbemeasuredandthedatacanbesavedautomaticaly.it proachwasobtainedbycomparingthewidthofmoltenpoolex- tractedinvariousimageprocessingmethods.thewidthofmolten laidafoundationfortherealizationofqualitycontrolindoubleelectrodemigwelding. Keywords: by-pascoupledarc;moltenpooledgeextraction;morphologytrackingand techniqueoflargefilet weldseam ofmobileweldingrobot MAO Zhiwei,, LI Shuyang, GEWentao, PANJiluan, ZHANGHua (.Robot andweldingautomationlaboratory, NanchangUniversity, Nanchang, TsinghuaUniversity, Beijing, China).p - Abstract: Fortheproblemthattheuniformweldingspeed leadstobadshapeatthepeakoffiletweldseamduringtracking thelargefiletweldseamofmobileweldingrobots, themethodof China;.DepartmentofMechanicalEngineering, weldingcurentadjustedon-lineandintimeaccordingtothe weldingspeedispresented. First, Kinematicanalysisofthe largefiletweldseamtrackingisgiven, andtheweldingspeedis changedfolowcosinelawtoachievethenormalwelding.then, weldingcurentisadjustedon-lineaccordingtothechangesof weldingspeedinweldingproces.weldingcurentmatchedto weldingspeedisgainedbyexperiments.bymatchingexperiments, weldingcurentatthefiletpositionmatchedtotheaver-