2)U-MIG 焊比普通 MIG 焊在靠近焊絲端部的
電流密度分布更密集?溫度更高更集中?而在工件表
面?隨著電流的增加超聲對電弧電流密度的影響在
逐漸降低? 電流密度分布模擬結(jié)果顯示?超聲添加
后粒子的電離度增加?電弧能量增加?
3)利用前人研究成果與本研究的模擬結(jié)果對
比?驗證了本次數(shù)值模擬結(jié)果的準確性? 另外?通過
對比模擬結(jié)果圖和圖像處理后的實驗采集電弧形貌
圖?進一步驗證了數(shù)學(xué)模型的可靠性?
4)該電弧模型可靠性高、適用范圍廣?為 MIG
焊接電弧機理研究提供了有效的技術(shù)支持? 同時?
該圖像處理方法可以為焊接過程圖像特征采集的研
究提供部分參考?
參考文獻:
[1] SATPATHY M P?SAHOO S K.Microstructural and me ̄
chanical performance of ultrasonic spot welded Al - Cu
joints for various surface conditions[J].Journal of Manu ̄
facturing Processes?2016?22:108-114.
[2] 李曉延?武傳松?李午申.中國焊接制造領(lǐng)域?qū)W科發(fā)展
研究[J].機械工程學(xué)報?2012?48(6):19-31.
[3] WU X? LIU T? CAI W. Microstructure? welding mecha ̄
nism?and failure of Al / Cu ultrasonic welds[J].Journal of
Manufacturing Processes?2015?20:321-331.
[4] XIE W F?HUANG T?YANG C L?et al. Comparison of
microstructure?mechanical properties? and corrosion be ̄
havior of gas metal arc ( GMA) and ultrasonic ̄wave ̄
assisted GMA (U-GMA) welded joints of Al-Zn-Mg al ̄
loy [ J ]. Journal of Materials Processing Technology?
2020?277:116470.
[5] NING F D? CONG W L. Ultrasonic vibration ̄assisted
(UV-A) manufacturing processes:state of the art and fu ̄
ture perspectives[J].Journal of Manufacturing Processes?
2020?51:174-190.
[6] YANG Z C?ZHU L D?ZHANG G X?et al.Review of ul ̄
trasonic vibration ̄assisted machining in advanced materi ̄
als[J].International Journal of Machine Tools and Manu ̄
facture?2020?156103594.
[7] KUMAR S?WU C S?PADHY G K?et al.Application of
ultrasonic vibrations in welding and metal processing: a
status review [ J]. Journal of Manufacturing Processes?
2017?26:295-322.
[8] WANG Y J?YU C?LU H?et al.Research status and future
perspectives on ultrasonic arc welding technique[J].Jour ̄
nal of Manufacturing Processes?2020?58:936-954.
[9] WANG D Q?HUA C?LU H.Numerical analysis of ultra ̄
sonic waves in the gas tungsten arc welding ( GTAW)
with ultrasonic excitation of current [ J ]. International
Journal of Heat and Mass Transfer?2020?158:119847.
[10] QIAO J N?WU C S?LI Y F.Numerical and experimental
investigation of keyholing process in ultrasonic vibration
assisted plasma arc welding[J].Journal of Manufacturing
Processes?2020?50:603-613.
[11] GAO X S?WU C S?GOECKE S F?et al.Numerical simu ̄
lation of temperature field?fluid flow and weld bead for ̄
mation in oscillating single mode laser - GMA hybrid
welding[J].Journal of Materials Processing Technology?
2017?242:147-159.
[12] LI H P?ZHANG X N?XIA W D.A numerical model of
non ̄equilibrium thermal plasmas.Ⅱ.Governing equations
[J].Physics of Plasmas?2013?20(3):33509.
[13] GUO H?ZHANG X N?CHEN J? et al. Non ̄equilibrium
synergistic effects in atmospheric pressure plasmas [ J].
Scientific Reports?2018?8(1):1-10.
[14] DONG B L?CAI X Y?NI Z?et al.Numerical simulation of
arc characteristics in narrow gap TIG welding[J].Interna ̄
tional Journal of Mechanical Sciences?2019?161:105031.
[15] DA CUNHA T V?BOHORQUEZ C E N.Ultrasound in arc
welding:a review[J].Ultrasonics?2015?56:201-209.
[16] THAVAMANI R?BALUSAMY V?NAMPOOTHIRI J?et
al.Mitigation of hot cracking in Inconel 718 superalloy by
ultrasonic vibration during gas tungsten arc welding[ J].
Journal of Alloys and Compounds?2018?740:870-878.
[17] JIAN L?YAO Z X?XUE K L.Anti ̄gravity gradient unique
arc behavior in the longitudinal electric magnetic field hy ̄
brid tungsten inert gas arc welding[ J].The International
Journal of Advanced Manufacturing Technology?2016?84
(1 / 2 / 3 / 4):647-661.
[18] OGINO Y?HIRATA Y?MURPHY A B.Numerical simula ̄
tion of GMAW process using Ar and an Ar-CO2
gas mix ̄
ture[J].Welding in the World?2016?60(2):345-353.
[19] ZHOU X M? ZHANG H O? WANG G L? et al. Three ̄
dimensional numerical simulation of arc and metal trans ̄
port in arc welding based additive manufacturing[ J].In ̄
ternational Journal of Heat and Mass Transfer?2016?103:
521-537.
[20] HSU K C?ETEMADI K?PFENDER E.Study of the free ̄
burning high ̄intensity argon arc [ J].Journal of Applied
Physics?1983?54(3):1293-1301.
?182? 南昌大學(xué)學(xué)報(工科版) 2023 年