简介:Manyapplicationsofultrasonic-assistedmethodswereusedduringmetalsolidification,buttheycouldnotbeintroducedintoweldpool.Inthispaper,awayofultrasonicassistedTIGweldingisintroduced.Bydirectlyimposedultrasonicvibrationonweldingarc,thevibrationinteractswitharcplasmaandpassestotheweldpool.Measurementresultsshowthatarcpressureissignificantlyincreasedwiththeultrasonicvibrationandthearcpressuredistributionmodelsarechanged.Bead-on-plateweldingtestsonSUS304confirmthatthistechnologycaninfluencethestyleofmetalmeltingandincreaseweldpenetrationdepth.
简介:增加焊接穿入的A-TIG的机制被使用我们为不锈钢开发了的激活的流动学习。流动和焊接水池的温度领域上的流动的效果被PHOENICS软件模仿。它证明没有流动,液体流动将沿着焊接水池然后在下面的表面是外面的,导致flatter焊接水池形状。与流动,氧,从否定价值把表面紧张毕业生的温度依赖改变到积极价值,能在焊接穿入上引起重要变化。液体流动将沿着向中心然后在下面的焊接水池的表面是里面的。这个液体流动模式高效地把热转移到焊接根并且生产相对深、狭窄的焊接。这个变化是穿入增加的主要原因。而且,弧建设能引起焊接宽度变得更狭窄并且变得更深的穿入,但是这不是穿入增加的主要原因。焊接水池表面和弧侧面的液体流动上的流动的效果在焊接的常规TIG并且在由使用高速度的摄像机焊接的A-TIG被观察。液体流动行为被微集中的X光检查传播录像观察系统在实时规模设想。结果显示与更狭窄的宽度和更深的穿入导致焊接祷告的更强壮的里面的液体流动模式能显然在焊接的A-TIG的情况中被识别。流动能在焊接水池改变液体流动的方向。它与模拟结果有一个好协议。
简介:摘要本文建立了考虑自由表面的TIG焊熔池模型,模型采用移动双椭球焊接热源。利用FLUENT模拟了不同电流下熔池表面的流场,从模拟出的数据中得到了不同焊接参数时流场特性,分析研究焊接熔池的形成过程。
简介:摘要: 研究了手工TIG、热丝自动TIG连续焊接工艺对TP310HCBN材料焊接接头的组织与性能、生产效率的差异,对比分析两种焊接方法对TP310HCBN管子焊接接头的组织和性能的影响规律,为TP310HCBN材料采用热丝自动TIG连续焊接工艺的应用提供依据。 试验结果表明,采用这两种焊接方法,焊接接头的微观组织基本相似,均有良好的拉伸、弯曲和冲击韧性性能,而采用热丝自动TIG焊缝金属的塑性、韧性表现更加优异。手工TIG焊缝微观金相检查发现微裂纹,可能对焊接接头的服役寿命产生一定影响,热丝自动TIG连续焊接工艺的焊接效率是手工TIG焊接的7倍,具有明显的质量和效率优势。
简介:Anexperimentfordeterminingthelaser-TIGhybridweldingcharacteristicswascarriedoutinthreekindsofhybridmethods:CO2laser-TIGcoaxialhybrid,CO2laser-TIGparaxialhybridandNd:YAGlaser-TIGparaxialhybrid.TheexperimentalresultsindicatethathybridweldinghastwoweldingmechanismsinCO2laser-TIGhybridwelding:deeppenetrationweldingandheatconductionwelding.Astheeffectofthelaser-inducedkeyhole,thearcrootiscondensed,thecurrentdensityandpenetrationdepthincreasesignificantly,theweldingcharacteristicisapttodeeppenetrationwelding.Whencurrentincreasestosomedegree,thekeyholeinducedbylaserdisappears,whichproducesashallowpenetrationandwidebead.Theweldexhibitsheatconductionweldingcharacteristics.Furthermore,thearcimagesandweldbeadcross-sectionsofthreekindsofhybridmannerswerealsocomparedandanalyzedatdifferentweldingcurrents,whichestablishedthefoundationforunderstandingtheweldingcharacteristicsoflaser-TIGhybridweldingcomprehensively.
简介:ThehybridsourcethatcombinedCO2laserwithTIGarctoproceedweldingwasanalyzed.Basedonanenergymodel,thetemperaturefieldandweldshapewerecalculatednumerically.Theheattransfercharacteristicofthehybridheatsourcetoworkpieceanditseffecttoweldshapewerealsoanalyzed.Throughanalyzingtheenhancementeffectofthehybridheatsource,theabsorptioneffectanddefocusingeffectofthehybridarctolaserwerecalculated,andtheregularityoftheenergydensitytothecurrentwasobtainedsubsequently.Atlast,thecriticalenergymatchestoinducetheenhancementeffectofCO2laser-TIGarchybridweldingwereobtained.
简介:摘要:随着中国焊接技术的快速发展和产品质量要求的不断提高,TIG-MAG双弧焊接技术备受关注。本文对比了单一MAG焊接、TIG-MAG复合焊接和MAG-TIG复合焊接三种方法,并针对Q345-B低合金高强度钢进行了实验研究。实验结果显示,采用MAG-TIG复合焊接后,焊接宽度和熔池宽度均有所增加;采用TIG-MAG复合焊接后,焊缝余高和焊缝熔化厚度均有所增加;而采用TIG-MAG双弧焊接后,焊接余高和焊接熔化厚度均有所增加。这些结果对于进一步优化焊接工艺具有重要意义。
简介:Obtainingtheimageofmoltenpoolaluminumalloy'stungsteninertgas(TIG)weldingbecomesachallengingproblemintheweldingfield.Inthispaper,abran-newopticalsensorbasedanalyzingthelightspectrumwasdesigned,andtheclearimageofthemoltenpoolduringthealuminumalloy'sweldingusingthecommonindustrialCCDcamerawasobtained.Andwiththenewalgorithmprovidedbymyself,thedesirablecharacteristicparametersofthemoltenpoolofaluminumalloy'sweldingwereobtained,anditprovidesagoodbaseforadvancedmonitorweldingquality.