Arc change mechanism in Ultrasonic-Magnetic field coaxial hybrid GTAW

IF 7.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Mechanical Sciences Pub Date : 2025-05-23 DOI:10.1016/j.ijmecsci.2025.110407

Wenlong Li , Chuanchuan Jia , Yihao Gao , Huichao Jin , Chao Chen , Shupeng Wang

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引用次数: 0

Abstract

This work presented a new ultrasonic-magnetic-coaxial hybrid gas shielded tungsten arc welding (U-M-GTAW) method by mechanically coupling ultrasonic and magnetic fields on the GTAW torch to overcome the limitations of conventional GTAW in terms of low energy density and shallow penetration. The arc characteristics under different welding modes (DC, AC, pulse, AC-pulse) were studied using a high-speed camera system, and an arc model and acoustic particle motion trajectory were established to elucidate the arc contraction mechanism. Results demonstrated that single and combined energy fields compressed the arc, with ultrasonic fields exhibiting stronger compression on the arc diameter and area, while magnetic fields primarily compressed the arc length. The combined energy field achieved the most significant compression, reducing the arc area by a maximum of 56.0 % and increasing welding voltage by a maximum of 33.2 %. The synergistic effect of ultrasonic and magnetic fields enhanced plasma collision, and the arc must contract to reduce heat dissipation. The energy density of the arc increased, thereby increasing the arc resistance and voltage. The methods of coaxial coupling of ultrasonic and magnetic fields provide a foundation for promoting high-energy density welding technology and applying GTAW technology.

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超声-磁场共轴混合GTAW电弧变化机理

本文提出了一种超声-磁-同轴混合气体保护钨电弧焊（U-M-GTAW）新方法，通过在GTAW焊枪上机械耦合超声和磁场，克服了传统GTAW能量密度低、焊深浅的局限性。利用高速摄像系统研究了不同焊接方式（直流、交流、脉冲、交流-脉冲）下的电弧特性，建立了电弧模型和声粒子运动轨迹，阐明了电弧收缩机理。结果表明，单一能量场和组合能量场对电弧均有压缩作用，其中超声场对电弧直径和面积的压缩作用更强，而磁场对电弧长度的压缩作用更大。复合能量场的压缩效果最为显著，最大减小了56.0%的电弧面积，最大提高了33.2%的焊接电压。超声波和磁场的协同作用增强了等离子体碰撞，电弧必须收缩以减少散热。电弧的能量密度增加，从而增加了电弧电阻和电压。超声与磁场同轴耦合的方法为高能密度焊接技术的推广和GTAW技术的应用奠定了基础。

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来源期刊

International Journal of Mechanical Sciences 工程技术-工程：机械

CiteScore

12.80

自引率

17.80%

发文量

769

审稿时长

19 days

期刊介绍： The International Journal of Mechanical Sciences (IJMS) serves as a global platform for the publication and dissemination of original research that contributes to a deeper scientific understanding of the fundamental disciplines within mechanical, civil, and material engineering. The primary focus of IJMS is to showcase innovative and ground-breaking work that utilizes analytical and computational modeling techniques, such as Finite Element Method (FEM), Boundary Element Method (BEM), and mesh-free methods, among others. These modeling methods are applied to diverse fields including rigid-body mechanics (e.g., dynamics, vibration, stability), structural mechanics, metal forming, advanced materials (e.g., metals, composites, cellular, smart) behavior and applications, impact mechanics, strain localization, and other nonlinear effects (e.g., large deflections, plasticity, fracture). Additionally, IJMS covers the realms of fluid mechanics (both external and internal flows), tribology, thermodynamics, and materials processing. These subjects collectively form the core of the journal's content. In summary, IJMS provides a prestigious platform for researchers to present their original contributions, shedding light on analytical and computational modeling methods in various areas of mechanical engineering, as well as exploring the behavior and application of advanced materials, fluid mechanics, thermodynamics, and materials processing.