基于LabView虚拟仪器的CO_2焊接参数采集分析系统

LabViewCO21,1,1,13,2(1.,200030;2.,226006):NI,,,,,,,,:LabView;;;;:TG409:A:0253-360X(2003)04-43-050,,,,,;,NI(Nationalinstrument,)LabView1(Virtualinstrument,VI),,,,PC;I/O(:2002-11-083DAQGPIBVXIRS232/RS485);,,,;,,,,,,LabView(Laboratoryvirtualinstrumentengineeringworkbench,)NIG(Graphicslanguage,)Lab2View,,,DAQGPIBPXIVXIRS-232/485,Internet,,[1]21,24420038TRANSACTIONSOFTHECHINAWELDINGINSTITUTIONVol.24No.4August2003©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.NIDAQPCI-6023E(6023E,I/OI/O,200kHz),DSP()I/O,;,D/A,;231Fig.1Theorydiagramoftestingsystemshardware2Fig.2Collectioncircuitofweldingcurrent3Fig.3Collectioncircuitofweldingvoltage,,DSP(),I/OLabView,,3LabView4,(),DAQ;,()CO2,,;;,,,G(h)f(a+h)-f(a-h)2h,(1):af(a+h)x=(1)G(h)=f(a)+h23!fÊ(a)+h45!f(5)(a)+(2),,4424©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.(a)Frontpaneldiagram(b)Flowchartdiagram4Fig.4Collectivitydesigndiagramofsystemssoftwareplatform,h,f(a+h)f(a-h),,,dt,m(m=0,1,2,3,),du[m]=u[m+1]-u[m-1]2dt(3),n[2],,,,,,m:(u(m)u01)(i(m)i01)=1,(u(m-1)u01)(i(m-1)i01)=0,:10;u01,i01;U(m)mn:(|u(n)|u02)(i(n)i02)=1,(|u(n-1)|u02)(i(n-1)i02)=0,:10;u02,i02;U(n)n[3]NBMD-500(DSP),1.2mmCO2,5:23V,200A,100%CO2,15L/min,1.2mm,ER70S-6,,400mm200mm10mm,15mm,350mm/min5,,;,(0/5V);D/A,;(),,;,;,,,,,,544,:LabViewCO2©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.5Fig.5Real2timecollectedsignal,,,,,,,;,6,,PDD(),,PDD,;PDDPDD,6Fig.6Pimaryparametersprobabilitydensitydistributingdiagrams4,LabViewCO2,;[50]6424©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.1GTAWTable1ComparingemulationerrorofbacksidebeadwidthinplatepulseGTAW1030impulse3160impulse6190impulseBrrorindexSverageWs/mmMaxiumerrorWm/mmSverageWs/mmMaxiumerrorWm/mmSverageWs/mmMaxiumerrorWm/mmConventionalFC0.150.360.210.450.140.41FNNCbasiconGA0.080.160.140.290.110.274(1),,,(2)GTAW,,(3),:[1],.[M].:,2000.[2],,,.[J].,1992,21(8):4852.[3],,,.GA[J].(),2002,23(1):9194.[4],.[J].(),2002,23(4):6871.[5]ParsonT.Genetic2basednewfuzzyreasoningmodelwithapplica2tiontofuzzycontrol[J].IEEETrans.onSMC,1994,24(1):3945.[6]AlenVarsek.Geneticalgorithmsincontrollerdesignandtuning[J].IEEETransomSMC,1993,23(5):13301338.[7].[A].[C].:,1996.:,,196211,,,30Email:[e-mail][46]LabView,:[1],,,.LabView[M].:,2001.14.[2],,.CO2[J].,2000,(10):1113.[3].CO2[D].:,2001.:,,19795,,5Email:[e-mail]0524©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.cladlayer,suppresstheformationofblockphaseinthelasercladlayerandreducethecrackingsusceptibilityobviously.Themicrohardnessdis2tributionofG112+(massfraction,%)4TiO2lasercladlayerisuniform,anditsaveragemicrohardnessis750HV0.3.Keywords:lasercladding;TiO2;nickelhardfacingalloy;mi2crostructureFormingprocessanalysisofequiaxedgraininweldnuggetzoneduringfriction2stirweldingofaluminumalloyWANGDa2yong,FENGJi2cai,DIOu,LIUHui2jie(NationalKeyLaboratoryofAdvancedWeldingProductionTechnology,HarbinInstituteofTechnology,Harbin150001,China).p3335Abstract:Aphysicalmodeloftheformingprocessofequiaxedgraininweldnuggetzoneduringfrictionstirweldingofaluminumalloywasestablished.Experimentalresultsshowedthatthermalcyclecausedmaterialsofteningnearrotationtool.Softeningmaterialflowedasplasticstateunderthemechanicalstirofrotationtool.Thespeedofdifferentflowinglayerinsofteningmaterialwasdifferent,resultinginspeedgradi2endsandstickingfrictionshearstressattheinterfacebetweenadjacentlayers.Undertheshearstress,thebandedstructuresofparentmaterialwerehighlyelongatedandbended.Whenthedegreeofbendexceededthelimitofgrainboundary,theoriginalbandedstructuresboundarybe2gantodegrade,andtheequiaxedgrainsforminginbandedstructureswerearrayedbytheenergyprinciple,resultinginnoorderanddirectionpatternofequiaxedgrains.Keywords:weldnugget;friction2stirwelding;formingprocessanalysisStrengthandfracturebehaviorofSi3N4ceramic/Inconel600alloyliq2uidphaseinductivediffusionbondingjointYANGMin,ZOUZeng2da,LIUXiu2zhong,WANGYu2fu,CUIFeng2you(SchoolofMa2terialScienceandEngineering,ShandongUniversity,Jinan250061,Chi2na).p3638,42Abstract:BondingofSi3N4ceramictoInconel600alloywascarriedoutbyliquidphaseinductivediffusionbonding(LPIDB)methodwithNb/Cu/Nimulti2interlayer.Effectofbondingconditiononjointstrengthandfracturebehaviorwasinvestigatedinthepaper.Jointstrengthwasevalua2tedbysheartest,shearfracturesurfaceofthejointwasobservedbySEM.Itwasshownthattheparabolicrelationshipamongtheshearstrengthofthejointandbondingtemperature(whenbondingtimeis3000sandbondingpressureis5MPa),bondingpressure(whenbondingtemperatureis1130andbondingpressureis10MPa)wasobserved.Keyword:liquidphaseinductive;diffusionbonding;Si3N4ceram2ic;Inconel600StudyoncontactinglineoftwointersectingpipesinweldingassemblyLIXiao2gang,LBi2feng,YAOWei2wei,XUEJi2ren(MaterialSci2enceandEngineeringDepartment,DalianRailwayInstitute,LiaoningDalian116028,China).p3942Abstract:Intheweldingengineeringoflarge2scalepipestructures,theassemblyprecisionandthebranchpipecuttingcurveoftwointer2sectingpipeshaventbeensettledforalongtime.Basedontheengineer2ingpracticesofpipestructure