資源描述：
《Consumable Double-Electrode GMAW — Part 1 The Process》由會員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、ConsumableDouble-ElectrodeGMAWPartI:TheProcessbyKehaiLiandY.MZhangKehaiLi(kehai.li@uky.edu,PhDstudent,)andY.M.Zhang(ymzhang@engr.uky.edu,ProfessorofElectricalEngineeringandCorrespondingAuthor)arewithCenterforManufacturingandDepartmentofElectricalandComputerEngineering,Universityo
2、fKentucky,Lexington,KY40506.AbstractDouble-ElectrodeGasMetalArcWelding(DE-GMAW)isanovelweldingprocessrecentlydevelopedtoincreaseweldingproductivitywhilemaintainingthebasemetalheatinputatadesiredlowlevel.Inthispaper,theDE-GMAWprocesswasimprovedbyreplacingitsnon-consumabletungstene
3、lectrodewithaconsumableweldingwireelectroderesultinginanewprocesscalledconsumableDE-GMAW.Tounderstandthisnewprocessanditsprospectsasaneffectivemanufacturingprocess,theauthorshavestudiedfundamentalissuesandproposedsolutionstoresolvetheproblemsencountered.Thesefundamentalissuesincl
4、udethestabilityoftheprocess,theadjustabilityofthebypasscurrent,theeffectsofthebypassarconthetotalcurrentandthemeltingrate,andthemodeofmetaltransferofthebypassweldingwire.1Keywords:Double-Electrode,ArcWelding,WeldingProductivity,DepositionRate,DualWireWelding,WeldingControls,HeatI
5、nput1.IntroductionNovelprocessesareonekeytomaintainingthemanufacturingindustry’scompetitivenessandtechnologicalleadershipbyincreasingproductivityorreducingcost.Withthisinmind,severalnewweldingtechnologieshavebeendeveloped.Forexample,laserweldingcandeliververydenseenergy,thusthewe
6、ldpoolissmallbutthepenetrationisdeep.Thefillermetalisreducedresultinginhighproductivity.Thecombinationoflaserweldingandgasmetalarcwelding(GMAW)hascreatedhybridlaser-arcprocesses(Refs.1-8)tofurtherimproveproductivity.Asthemostwidelyusedprocess,GMAWhasbeenmodifiedtoobtainfasterdepo
7、sition.BecausetheweldingcurrentIinconventionalGMAWisthesamefortheanodeandcathode,increasingtheweldingcurrenttoimprovedepositionratewillalsocauseanincreaseinthebasemetalheatinput(Refs.9-11).In2addition,arcpressureisconsideredtobeproportionaltoI(Ref.12).Alargearcpressureblowsmetala
8、wayfromtheweldpoolandgeneratesundesiredu
