逆变电阻点焊电参数测试与质量智能监测的研究

《逆变电阻点焊电参数测试与质量智能监测的研究》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、AbstractResistancespotwelding(RSW)iswidelyusedintheproductionofautomobile，aviation，electronicelementandappliancewiring．Thespotweldingpowersupplyhasbeenrenovatedastheincreasingdemandsofspotweldingquality，RSWinvertersatisfiesdemandsofspotwelding，becauseithaslotsof

2、advantages，suchasdirectcurrent(Dc)output，excellentdynamicresponseandprecisionoutput，miniaturizationetc．ItisthedevelopmentorientationofRSWpowersupply．AimingtogathertheweldingparametersofRSWaccuratelyandreal-timely，multi—parameterstestingsystemwithPICl8F6585micro·

3、controllerisdesignedinthispaper．Itisthebaseofcontrollingpowersupplypreciselyandforecastingtheweldingqualityaccurately．Theparametersincludesecondarycurrent，weldingvoltage，weldingpowerandweldingtime．ConsideringthecharacteristicsofRSWinverter，theweldingcurrentismea

4、suredbyRogoswkiandvoltageisobtainedfromtheelectrodedirectly．Simplebuteffectivehardwarecircuitandsoftwarecalculationareadoptedtorealizetheseparameterscollectionandprocessinginthissystem．Alsothesystemcancommunicatewithpersonalcomputer(PC)．Thehardwareandsoftwareint

5、hissystemisprovedfeasible，anditsdetectingprecisionishigher．ThecharacteristicSofRSWinverterhasbeentestedandanalyzedbythetestingsystem。Thecurrentandvoltagewaveformhavebeendetectedandanalyzedintheconditionofdifferentinvertfrequency，powersupplyinput，loadsandpulsewid

6、th．Resultsshowthatthree-phaseRSWinverterissteadierthansingle—phase’S．Electricnetworkloadismorebalanceabletoo．Thehighertheinvertfrequencyis，thesteadiertheoutputcurrentandthesmallertheadjustmentresolutionofweldingtimeare．Thedynamicresponseisquickertoo．ABPartificia

7、lneuralnetwork(ANN)modelisestablishedtoforecastthequalityofRSWinverter．ThedynamicresistanceischoiceasinputparameterofANNmodel，whichreflectstheweldingarea’Sheatingandnugget’Sgrowingup．Thetensilestrengthwhichrepresentsthequalityofweldingspotisforecasted。TheRSWofsh

8、eetphosphorbronzeandbrasswirearechosenasresearchobjects，whicharewidelyusedinelectronicU第一章绪论1．1本课题的学术背景与实际意义1．1．1研究的背景电阻点焊广泛应用于薄板冲焊结构生产，如汽车驾驶室、轿车车身、飞机机翼、航空发动机扰流器、建筑用钢