文档名：基于双层凹型集磁器的管件电磁胀形电磁力特性及变形行为研究
摘要：针对传统管件电磁胀形存在管件壁厚减薄严重和变形不均匀等问题,提出基于双层凹型集磁器结构的单线圈管件电磁成形方法,通过径向电磁力场分布的调控和轴向电磁力的协同加载,为同时抑制管件壁厚减薄和改善变形均匀性提供了新的技术途径.为验证该方法的有效性,基于电磁-结构场耦合数值模型,对比探究有无双层凹型集磁器下轴径电磁力分布特性、管件壁厚减薄量以及轴向变形均匀性等关键物理量的变化规律,研究集磁器的内凹高度对管件成形行为的影响.仿真结果表明,与传统管件电磁胀形方法相比,新方法下管件壁厚减薄量可从22.07%降低至8.30%,且轴向均匀性扩大至2.31倍.
Abstract：Electromagneticformingtechnologyhassignificantadvantagesovermechanicalprocessingtechnologyintheprocessingoflightalloymaterialsandisanimportantwaytorealizeenergysavingandemissionreductioninaerospace,automobilemanufacturingandotherfields.However,thetraditionalelectromagnetictubeexpansionprocesshasthedefectsofseriouswallthinningandunevenaxialdeformation.Basedonthetraditionalelectromagnetictubeexpansionsystem,thispaperproposedanoveltypeofdouble-layerfieldshapertoregulatethedistributionofmagneticfieldandelectromagneticforce.Thenewfieldshaperstructurecanadjusttheradialelectromagneticforcedistributioncharacteristicfrom"smallattheends,largeinthemiddle"modeto"largeattheends,smallinthemiddle"mode.Andthesmalleraxialelectromagneticforceattheendofthetubecanbeadjustedtoalargerelectromagneticforce.Theadjustmentoftheradialelectromagneticforcefielddistributioncanweakentheradialelectromagneticforceinthemiddleoftheformedtube,thuschangingthedeformationshapeofthetubeandimprovingthecharacteristicsofunevenaxialdeformationofthetube;theadjustmentoftheaxialelectromagneticforcefielddistributioncanpromotetheflowofthematerialattheendofthetubetothemiddlearea,compensatingforthereductionofthewallthicknessofthetubeduetoradialexpansion,thussuppressingthewallthicknessthinningphenomenonofthetube.Toverifytheeffectivenessofthedouble-layerfieldshaper,thefiniteelementmodelofelectromagneticcouplingstructurefortheelectromagnetictubeexpansionsystemwasestablishedbyusingCOMSOLsoftware.Inthispaper,thechangelawsofthekeyphysicalquantities,suchas,theelectromagneticforcedistribution,theaxialdeformationuniformityandthewallthicknessthinningamountwerecomparedandstudiedundertheconditionwithorwithoutfieldshaper.Onthisbasis,theinfluenceoftheinnercavitydepthofthefieldshaperontheformingeffectoftubeswasfurtherexplored.Thesimulationresultsshowthatthenewfieldshaperstructureimprovestheaxialuniformityby2.31timescomparedwiththetraditionalexpansionprocess,andreducesthewallthicknessthinningfrom22.07%to8.30%.Theeffectivenessofthenewfieldshaperstructureinimprovingthewallthicknessthinningandunevenaxialdeformationoftubeswasverified.Inaddition,increasingtheconcaveheightoffieldshaperishelpfultorestrainthewallthinningoftubes,andincreasetheaxialuniformityinacertainrange.However,withthefurtherincreaseoftheconcaveheightoffieldshaper,theradialandaxialforcefieldsinthetubeformingareaarefurtherregulated,theaxialuniformitywillslightlydecrease,butitisstillsignificantlybetterthanthetraditionaltubeexpansioneffect.Itisworthmentioningthatthebulgingmethodproposedinthispaperadoptssingledrivecoilwithsimplestructureandconvenienttoolingcomparedtomulti-coilelectromagneticformingsystems.Theactualeffectofthebulgingmethodwillbefurtherverifiedfromtheexperimentallevelinthefuture.
作者：邵子豪 吴伟业 汪晨鑫 邱立 Author：ShaoZihao WuWeiye WangChenxin QiuLi
作者单位：三峡大学电气与新能源学院宜昌443002;梯级水电站运行与控制湖北省重点实验室宜昌443002三峡大学电气与新能源学院宜昌443002;国网安徽省电力有限公司来安县供电公司滁州239200
刊名：电工技术学报
Journal：TransactionsofChinaElectrotechnicalSociety
年，卷(期)：2024, 39(5)
分类号：TM154
关键词：电磁成形 电磁力 集磁器 变形行为
Keywords：Electromagneticforming electromagneticforce magneticfieldshaper deformationbehavior
机标分类号：TG146.22TM351TG306
在线出版日期：2024年3月19日
基金项目：国家自然科学基金基于双层凹型集磁器的管件电磁胀形电磁力特性及变形行为研究[
期刊论文] 电工技术学报--2024, 39(5)邵子豪 吴伟业 汪晨鑫 邱立针对传统管件电磁胀形存在管件壁厚减薄严重和变形不均匀等问题,提出基于双层凹型集磁器结构的单线圈管件电磁成形方法,通过径向电磁力场分布的调控和轴向电磁力的协同加载,为同时抑制管件壁厚减薄和改善变形均匀性提供...参考文献和引证文献
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