简介:Usingsteppatternmatchtechnologywithvariationalresolutioncanrecognizethepositionandorientationoftheweldseamintheimage.Accordingtousingtheimagesegmentationmethodbasedonpatternmatch,notonlyadvancedthespeedandanti-jammingcapability,butalsocapturedtheedgeinformationoftheweldseamandtheedgeoftheworkpiece,andtheimagecoordinateoftheinitialweldingpositioncanbeobtained.Thematrixforhand-eyerelationshipoftherobotcanbecalculatedbyadoptingtherapidcalculationmethod.Accordingtothedepthcalculatingprinciplewiththespecialpointmatchingusingbinocularstereovision,theinitialweldingpositioncanbeconfirmedbycalculatingthemiddlepointoftheperpendicularlineoftworadialsinthespace,andthefunctiontoguidetheweldingrobottotheinitialweldingpositioncanberealized.
简介:InhighspeedMAGweldingprocess,someweldformationdefectsmaybeencountered.Togetgoodweldquality,thecriticalweldingspeedbeyondwhichhumpingorundercuttingweldbeadcanoccurmustbeknownfordifferentconditions.Inthisresearch,highspeedMAGweldingtestswerecarriedouttocheckouttheeffectsofdifferentfactorsonthecriticalweldingspeed.ThroughobservingtheweldbeadprofilesandthemacrographsofthetransversesectionsofMAGwelds,theoccurrencetendencyofhumpingweldwasanalyzed,andthevaluesofcriticalweldingspeedweredeterminedunderdifferentlevelsofweldingcurrentorvoltage,andtheeffectofshieldinggascompositionsonthecriticalweldingspeedwasalsoinvestigated.
简介:ChineseWeldingSocioty¥//TheChineseWeldingSociety(CWS),foundedin1962,isanationalmassacademicandengineeringorganizationinthefie...
简介:由使用焊接电线的镍,焊接弧的以铁酸盐为主要成的可锻的铁的部分熔化地区(PFZ)和焊接金属的机械性质的寒心的趋势上的alloying的效果系统地被学习了。在这个基础上,为以铁酸盐为主要成的可锻的铁(QT400-17)的弧焊的一个新镍电极第一次被开发。它的焊接金属的机械性质能以铁酸盐为主要成的可锻的铁匹配那些。在PFZ的碳化物层(WCL)的宽度显著地被减少,焊接关节有优秀马赫无能,焊接金属有高热的抗碎裂性。(编辑作者摘要)3个裁判员。
简介:Weldingtransformeriswidelyusedinindustrymanufacturing,depletingalargePortionofelectricityenergy.Basedonmoderncomputerandmathematicalprogramming,Optimundesignofelectro-magneticdevicesleadstohighlyefficientuseofenergrandmaterials.Arcweldingtransformerisoptimizedhere.Amathematicalmodel,consideringbothproductivecostandoperatinglosses,whichiscalledarEconomical-through-Lifetransformer,isestab-lished.Mixedfunctionmethod,mixeddispersingvariablemethodandimprovedorthogonalmethodhavebeenappliedtocarryouttheoptimizationcalculations.ResultshowsthatthepowerfactorisquiteimportantinanEconmi-cal-through-Lifetransformer,andthatsomeprinciplesmustbefollowedinthedesignwork.Alsodiscussedarethead-vantagesanddisadvantagesofthethreemethods.Intheend,theprospectofoptimumdesignofweldingtransformerisforecast.
简介:SurveyonChineseweldingconsumables¥ZHAOLisan(HarbinResearchInstituteofWelding(150080))Abstract:InChina,themainproductsofweldin...
简介:Theelectronbeamwelding-brazingbeingusedtojoin5A06AlalloytoTC4Tialloydecreasestheformationofbrittleintermetalliccompound.Experimentswerecarriedouttostudytheinfluenceofelectronbeamweldingparametersonthetensilestrengthofwelds,basedonanorthogonaltestandanalysismethod.Theweldingparametersincludebeamcurrent,weldingspeed,scanningfigure,scanningfrequency,figuresize,beamoffsetandfocuscurrent.Theoptimumparametersfor3mm5A06Alalloyand2mmTC4alloywereasfollows:accelerationvoltagewas60kV,beamcurrentwas11mA,weldingspeedwas600mm/min,focuscurrentwas0mA,scanfigurewasO,scanningfrequencywas1000Hzandbeamoffsetwas0.5mm.Theresultsshowthatthejointswerewithgoodappearanceandqualityweldedbytheoptimumparameters.ThesuccessfuljointscouldbegainedandthemaximumtensilestrengthofAl/Tidissimilaralloyjointscouldbeupto222.61MPausingelectronbeamwelding-brazing.
简介:Thehigh-speedcamerasystemanddataacquisitionsystemofweldingparameterswerecreatedintandemMIGweldingofhighstrengthaluminumalloy.Theexperimentswerecarriedoutinordertoobtainthephotosofdroplettransferunderdifferentweldingparametersinpulsedmode.Thedroplettransfermodeof"onepulseonedroplet"becomesthepreferredselectionduringweldingprocessbecauseofitsstableprocedureandsoundweldform.Theparameterrangesforcorrespondingtransfermodewereexperimentallyachieved,amongwhichthestabledroplettransfermodeof"onepulseonedroplet"canberealized.Theseeffortsbravethewayforcontrolweldheatinputandweldformationinthefuture.
简介:Inthisessay,westudiedhowheatinputaffectedthemicrostructure,hardness,grainsizeandheat-affectedzone(HAZ)dimensionofWCX355ultra-finegrainsteelwhichwasweldedrespectivelybytheultranarrow-gapwelding(UNGW)processandtheoverlayingprocesswithCO2asprotectiveatmosphereandlaserweldingprocess.Theexperimentalresultsshowwhentheheatinputchangedfrom1.65kJ/cmto5.93kJ/cm,thewidthofitsHAZrangedfrom0.6mmto2.1mm.Theaveragegrainsizegrewupfrom2~5μmofbasemetalto20~70μmandfoundnoobvioussoftenphenomenoninoverheatedzone.Thewidthofnormalizedzonewasgenerallywideas2/3asthatofthewholeHAZ,andthegrainsizeinthiszoneissmallerthanthatinbasemetal.Underthecircumstanceofequalheatinput,theHAZwidthofUNGWisnarrowerthanthatofthelaserwelding.
简介:Inlasernon-penetrationdeeppenetrationweldingprocess,weldingmaterialwillvaporize,metalvaporandambientgaswillproduceahigherdegreeionization,whichformsplasmaofhighconcentration.Inthecaseofformingasmallhole,plasmawillejectfromthehole,andformacousticemission(AE)signals.BecauseAEinformationhasmanyadvantagessuchasnon-contactmeasuring,fastresponse,andhighratioofsignaltonoise,itcanbeusedasamonitorvariableforin-processcontrol.BystudyingAEinformation,informationofweldingpoolandsmallholecanbeobtained.AccordingtocharacteristicofAEinformation,thispaperrevealsthecorrelationbetweenweldingparametersandAEsignals,andprovidesagoodbaseforfurtherqualitycontrol.
简介:TheAl-alloyarc-weldingshapingsystembasedonarc-weldingrobotisestablished,andtheAl-alloyshapingmanufactureisrealizedwiththeDC(directcurrent)gasmetalarcwelding(GMAW).TheresearchindicatesthatthemetaltransfertypeofDCGMAW,heatinputandtheinitialtemperatureoftheworkpiecegreatlyaffecttheAl-alloyshapingbasedonarcweldingrobot.Onthepenetration,theweldwidthandthereinforcement,theinfluenceofweldingparametersisanalyzedbygeneralizedregressionneuralnetwork(GRNN)fitting.