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汽车薄钢板激光拼焊数值模拟研究.docx

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汽车薄钢板激光拼焊数值模拟研究 Abstract: Inordertoimprovetheweldingefficiencyandqualityofautomobilethinsteelplate,numericalsimulationtechnologywasusedtostudythelasersplicingweldingofautomobilethinsteelplate.Basedontheheattransferandfluidflowtheory,thetemperaturefield,stressfieldanddeformationfieldoftheweldingprocessweresimulatedandanalyzedbyusingANSYSsoftware.Theresultsshowedthattheweldingtemperatureandresidualstresswereaffectedbythelaserpower,weldingspeedandvacuumdegree.Inordertoachieveagoodweldingeffect,itisnecessarytoadjusttheweldingparameterstoobtainasuitabletemperaturefieldandstressfield.Theresearchresultsprovidetheoreticalguidancefortheoptimizationoftheweldingprocessofautomobilethinsteelplate. Keywords:automobilethinsteelplate,lasersplicingwelding,numericalsimulation Introduction: Inrecentyears,withthedevelopmentofautomobileindustry,thedemandforautomobilethinsteelplatehasbeenincreasing.However,duetothecharacteristicsofthinandsoftmaterials,thetraditionalweldingprocessisdifficulttoachievetheweldingeffectofhighefficiencyandhighquality.Asanadvancedweldingmethod,lasersplicingweldinghasbecomearesearchhotspotintheweldingfieldduetoitsadvantagesofhighenergydensity,fastweldingspeedandsmallheat-affectedzone.Inordertoimprovetheweldingefficiencyandqualityofautomobilethinsteelplate,numericalsimulationtechnologywasusedtostudythelasersplicingweldingofautomobilethinsteelplate. Simulationmodelandparameters: Thesimulationmodelwasestablishedbasedonthegeometryandmaterialpropertiesoftheautomobilethinsteelplate.TheweldingprocesswassimulatedbyusingANSYSsoftwarebasedontheheattransferandfluidflowtheory.Thesimulationparametersincludedlaserpower,weldingspeedandvacuumdegree. Resultsanddiscussion: Thesimulationresultsshowedthatthetemperaturefield,stressfieldanddeformationfieldoftheweldingprocesswereaffectedbythelaserpower,weldingspeedandvacuumdegree.Withtheincreaseoflaserpowerandweldingspeed,thetemperaturefieldandresidualstressoftheweldedjointincreased.Whenthevacuumdegreewaslower,theoxidationreactionoccu