铜合金等离子弧焊接温度场的数值分析及试验研究

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1、河北工业大学硕士学位论文铜合金等离子弧焊温度场的数值分析及试验研究摘要对温度场宽度有要求的铜合金的焊接一直是焊接的难点之一，本文以铜合金为例进行高导热合金的等离子弧焊接性能的试验研究。并分别进行铜合金的激光焊接、钨极氩弧（TIG）焊接，对比三种焊接方法的温度场宽度。等离子弧焊(PAW)是主要的高能密度焊接方法之一，本课题通过分析水电分离式等离子弧焊炬，连接等离子弧电源控制电路同时设计焊接夹具，并对铜合金的等离子弧焊接实验深入的研究了其焊接工艺。本论文采用有限元分析软件，对铜合金等离子弧焊接温度场进行了模拟研究。对铜合金等离子弧焊接温度场模拟的解析解和数值解热源模型进行了总结。采用过

2、渡网格划分，并进行铜合金的激光焊、钨极氩弧焊的温度场模拟，来对比三种焊接方法的温度场宽度。通过以上理论和实际方面的分析研究，在得到高质量的焊接接头的同时满足课题中对焊接热场不宜过大的要求。充分发挥等离子弧焊接的优越性，更加充分实际的利用好等离子弧温度高能量密度大热场小的优点。关键词：铜合金温度场等离子弧焊有限元数值模拟ⅰ铜合金等离子弧焊温度场的数值分析及试验研究THENUMERICALANALYSISANDEXPERIMENTALSTUDYONPLASMAARCWELDINGOFCOPPERALLOYABSTRACTItisaproblemforweldingwhentherear

3、erequirementsonthetemperaturefieldofhighthermalconductivityalloywelding.Inthispaper,Inthispaper,copperalloyasanexampleofahighthermalconductivity,suchasplasmaarcweldingofthepilotstudy.Andtoseparatethecopperalloylaserwelding,tungstenargonarc(TIG)welding,Comparisonofthreemethodsofweldingtemperatu

4、refieldwidth.PlasmaArcWelding(PAW)isthemainmethodofhighenergydensityweldingshareawiderangeofareas.Theissueofwaterandelectricitythroughtheseparationofplasmaarcweldingtorchtoconnectpowercontrol,suchasplasmaarcweldingfixturecircuitdesignatthesametime,copperalloyandtheplasmaarcweldingexperimentin-

5、depthstudyofitsweldingtechnology.Inthispaper,usingfiniteelementanalysissoftware,highthermalconductivityalloyplasmaarcweldingtemperaturefieldasimulationstudy.Ofcopperalloy,suchasplasmaarcweldingtemperaturefieldsimulationandnumericalanalysisoftheheatsourcemodelofasummary.Atransitionmesh,andcoppe

6、ralloylaserwelding,TIGweldingtemperaturefieldsimulation,threeweldingmethodtocomparethetemperaturefieldwidth.Throughtheabovetheoreticalandpracticalaspectsofanalysisandstudy,thehigh-qualityofweldedjointsonthetopicatthesametimemeettheweldingthermalfieldshouldnotbetoolargerequirements.Givefullplay

7、totheplasmaarcweldingsuperioritymorefullytheactualuseofplasmaarchightemperaturegeothermalfieldenergydensityofsmalladvantages.KEYWORDS:highthermalconductivityalloytemperatureplasmaarcweldingfiniteelementnumericalsimulationⅱ原创性声明本人郑重声明：所呈