Effects of phase difference on the behavior of arc and weld pool in tandem P-GMAW

Chen, Dongsheng; Chen, Maoai; Wu, Chuansong

doi:10.1016/j.jmatprotec.2015.05.022

Cited by 47 publications

(18 citation statements)

References 7 publications

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“…With the increase in main arc pulse peak current, the assisting arc stiffness at the background stage became poorer and its deflection increased because of the increase in electromagnetic attraction between the two arcs (Refs. [24][25][26]. This deflection would significantly decrease…”

Section: Welding Researchmentioning

confidence: 99%

High-Speed Tandem Pulsed GTAW of Thin Stainless Steel Plate

2019

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A novel high-speed welding process with tandem pulsed gas tungsten arcs, which employed two pulse arcs with a 180-deg phase to regulate the behavior of the weld pool and obtain a high-quality weld bead with low welding heat input, was proposed. The effects of pulse welding current parameters on the weld appearance were studied through a statistical design of experiment. The welding speed of a 1.2-mm-thick 304 austenite stainless steel plate can reach up to 3.0 m/min without sacrificing weld appearance quality. The grain structure, mechanical properties, and heat input of tandem pulsed gas tungsten arc welding (GTAW-P) were analyzed and compared with those of single and tandem GTAW. Good mechanical properties of the welded joint were obtained by tandem GTAW-P. Compared with the single and tandem GTAW, the heat input of tandem GTAW-P was decreased by 17.5 and 14.5%, respectively. The main arc at pulse peak obtained sufficient penetration, and the assisting arc at pulse background reduced the unnecessary heat input. When the main arc reached pulse background, the assisting arc at pulse peak heated the trailing region of the molten pool continuously to ensure reflow of the metal and suppressed the generation of weld defects.

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Section: Welding Researchmentioning

confidence: 99%

High-Speed Tandem Pulsed GTAW of Thin Stainless Steel Plate

2019

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“…To improve understanding about arc interruptions in tandem GMAW process and explore how the current pulsing synchronism between the arcs related to the arc interruption, Reis et al [23] proposed to evaluate the influence of parameters of adjacent arc and also of a single arc, which were subjected to magnetic deflection, on the occurrence of arc interruptions/extinctions. Also, Chen et al [24] observed three modes of arc interruptions, which were background arc interruption, pulse rise arc interruption and short-circuiting arc interruption, and derived that the arc interruption was resulting from over-elongation of background arc caused by the electromagnetic attraction from the peak arc at the other wire, and the electromagnetic attraction was closely related to the phase differences between currents of leading wire and trailing wire. Then according to corresponding experiment analysis, the work concluded that the effect of phase difference of the currents between two wires on weld appearance and also provided the relative reasons.…”

Section: B Tandem Gmaw Processmentioning

confidence: 99%

Review of the Recent Trends of Process Monitoring and Control for Double- Wire GMAW Process

Zhou

Yao

2019

IEEE Access

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Recently, double-wire gas metal arc welding (GMAW) process is more and more prevalently employed in industrial applications and attracted many academic researches. This paper reviewed the recent trends of researches and applications of this process. Three main aspects were included in this paper. The first was the operational process analysis of the process, and the reviewing work was divided into two catalogues: twin-wire GMAW process and tandem GMAW process, which were two main energy delivery and control formations of the process. This part focused on some negative phenomena, such as arc interruption, during the welding process and their effects on the products quality and process stability. Some works about using different current waveforms combinations and their effects on the welding process were discussed. Also, the works of numerical simulation for this process were mentioned in this part. The second part was about process stability monitoring, and corresponding works focused on establishing quantitative process stability estimation model. The last was the improvement of process control method, and the works mainly focused on the adjustment and modulation of the current waveforms, in order to eliminate negative phenomena, improve the process stability and obtain the products with high quality. Finally, some suggestions about future works were presented. This paper can provide references and enlightens for current academic researches or actual industrial applications in the double-wire GMAW process relative areas.INDEX TERMS Double-wire GMAW process, arc interruption, process stability, current waveform.

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“…Tandem welding is well known for its ability to increase welding productivity, as various authors have proved (Chen et al, 2015;Wu et al, 2018;Zhang et al, 2019). Tandem welding technique is employed in the heavy and automotive industries because it has a better productivity and deposition rate than single wire welding (Zargari et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Temperature Distribution in Tandem Welding Process

ÜNAL

AKKAŞ

2022

Karadeniz Fen Bilimleri Dergisi

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In this study, the numerical solutions for the steady-state heat conduction problem with uniform heat source, the steady-state heat conduction problem with convective heat transfer and the transient heat conduction problem have been developed using finite difference method. These numerical solutions have been validated with analytical solutions. After observing the good agreements between numerical solutions and analytical solutions, these three different problems combined to simulate the tandem welding process. The first objective of this study is to present a numerical simulator for the transient heat conduction problem that includes non-uniform moving heat sources and convective heat transfer term. This numerical simulator contains explicit and implicit time discretization methods. In this simulator, it is possible to change the grid sizes, time step sizes, total simulation time, distance between electrodes, magnitude of the sources' power, speed of the sources, etc. Secondly, the temperature distribution of single and twin wire welding processes have been compared using proposed numerical simulator to investigate the premature solidification of liquid metal in low-temperature zone of molten pool. Thirdly, experimental study was carried out using Fluke Thermal Imager to validate numerical results. It was obtained that the maximum temperature of numerical result is very close to the maximum temperature of experimental result with 0.248 % error. Finally, the all Matlab codes related to developed numerical simulator have been added to Appendix to facilitate other researchers’ work.

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Effects of phase difference on the behavior of arc and weld pool in tandem P-GMAW

Cited by 47 publications

References 7 publications

High-Speed Tandem Pulsed GTAW of Thin Stainless Steel Plate

High-Speed Tandem Pulsed GTAW of Thin Stainless Steel Plate

Review of the Recent Trends of Process Monitoring and Control for Double- Wire GMAW Process

Numerical Analysis of Temperature Distribution in Tandem Welding Process

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