简介:Theappliedconditionsofstudweldingononbodyofautomobile,andthecurrentwaveformsandsequencecon-troltechniqueswhicharesettomeetthequalityofstudweldingincarbody,areintroducedinthispaper.Therealiz-ingmethodofcurrentwaveformsandsequencecontrolbasedonmicroprocessorarealsodiscussedindetail,Thewaveformsofoutputweldingcurrentandvoltagearemeasured.Itisprovedthatthetechniquesincludingcurrentwaveforms&se-quencecontrolcansuccessfullymeetthedemandofautomobilestudwelding.
简介:Asimulationmodelisintroducedaboutthenon-linearityprocessofshort-circuitingtransferinCO2arcweldingfordisplayingtheinteractionbetweentheinverterpowersourceandweldingarcunderwaveformcontrol.Inthesimulationmodel,thefeedbacksignalsofcurrentandvoltagearetakenrespectivelyatthedifferentphaseinashortcircuitperiodictimeandappliedtothePWM(pulsewidthmodulation)moduleinamodelofinverterpowersourcetocontroltheoutputofpowersource.ThesimulationoperationaboutthedynamicprocessofCO2short-circuitingtransferweldingisimplementedonthefoundedsimulationmodelwithapeakarccurrentof400Aandapeakvoltageof35V,producingthedynamicarcwaveformswhichcanembodytheeffectofinverterharmonicwave.Thesimulatingwaveformsareclosetothatofweldingexperiments.
简介:Inthispaper,theweldpoolshapecontrolbyintelligentstrategywasstudied.Aneuronself-learningPSDcontrollerforbacksidewidthofweldpoolinpulsedGTAWwithwirefillerwasdesigned.ThePSDcontrolarithmeticwasanalyzed,simulatingexperimentbyMATLABsoftwarewasdone,andthevalidatingexperimentsonvariedheatsinkworkpieceandvariedgapworkpieceweresuccessfullyimplemented.Thestudyresultsshowthattheneuronself-learningPSDcontrolmethodcanattainaperfectcontroleffectunderdifferentsetvaluesandconditions,andissuitablefortheweldingprocesswiththevariedstructureandcoefficientsofcontrolmodel.
简介:Adigitalcontrolofpulsedgasmetalarcweldinginverterwasproposed.AcontrolsystemconsistingofanaloguepartswasreplacedwithanewdigitalcontrolimplementedinaTMS320LF2407ADSPchip.Thedesignandconstructionalfeaturesofthewholedigitalcontrolwerepresented.TheresourcesoftheDSPchipwereefficientlyutilizedandthecircuitsareveryconcise,whichcanenhancethestabilityandreliabilityofweldinginverter.Experimentalresultsdemonstratethatthedevelopeddigitalcontrolhastheabilitytoaccomplishtheexcellentpulsedgasmetalarcweldingprocessandthemeritsofthedevelopeddigitalcontrolarestableweldingprocess,littlespatterandperfectweldappearance.