A preliminary study on the double cold wire gas metal arc welding process

Assunção, P. D. C.; Ribeiro, Rodrigo Alves; Moreira, P.M.G.P.; Braga, Eduardo de Magalhães; Gerlich, A.P.

doi:10.1007/s00170-020-05005-6

Cited by 6 publications

(6 citation statements)

References 21 publications

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“…The CW-GMAW process uses the feeding procedures to those of the GTAW process with automated feeding, it presents itself as an alternative to increase productivity without increasing the heat input in the melting arc/puddle system. The respective process uses the introduction of an additional wire, at room temperature, in the atmosphere of the arc, generated by the main wire, through an independent feeder and an injector connected to the welding torch [70,[75][76][77][78]. In detail, Figure 9 illustrates the entry of the non-energized wire into the arc atmosphere in the CW-GMAW process.…”

Section: Optimized Welding Processesmentioning

confidence: 99%

Welding Residual Stresses to the Electric Arc

Rodrigues¹,

Costa²,

Cabral³

et al. 2021

Welding - Modern Topics

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Arc welding processes are widely used in the industrial sector, mainly for productivity and continuity. However, these processes have several undesirable results, such as distortions and residual stresses (RS). When compared to other welding processes, the RS level can make the welded joint unfeasible. Many studies on these arc welding discontinuities have been carried out in experimental and numerical areas about their measurement, analysis, and control, however, not yet clearly enlightened, since it is a complex topic, both for industry and academia, needing to be deepened. This study aims to present a contextualized approach to destructive and non-destructive techniques used to measure RS generated by arc welding, as well as the influence of these distortions and stresses on the welded structures and, finally, to present possible control techniques. Finally, this study highlights the use of CW-GMAW welding, which achieved a reduction in stress and distortion levels, due to the introduction of a non-energized wire in the arc of the GMAW process, as evidenced by the results of RS measured by X-ray diffraction (XRD) and acoustic birefringence (AB). Thus, in this context, the approach to RS in arc welding presented here is extremely relevant for researchers involved with the topic.

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Section: Optimized Welding Processesmentioning

confidence: 99%

Welding Residual Stresses to the Electric Arc

Rodrigues¹,

Costa²,

Cabral³

et al. 2021

Welding - Modern Topics

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show abstract

“…Many theoretical models have been defined to determine the process that occurs in the welding arc, including [76]. The main problems of these models were that they lose precision because it was very difficult to obtain a formula that contains all the complexity of these processes, as well as affirmed by Hang Dong in [77]. Mathematical models, based on machine learning techniques, have better results in problems as complex as this one.…”

Section: Modeling Welding Processmentioning

confidence: 99%

“…Other work is [79] a LR model that is utilized to analyze the pool image centroid deviation and weld based on visual weld deviation measurement in GTAW process. The other technique is Gaussian process (GP) regression (GP), which was utilized in [77] to predict better performance in arc welding process of GTAW process.…”

Section: Modeling Welding Processmentioning

confidence: 99%

“…The same philosophy is used in [54] for width and reinforcement control in independent control loops. Zhang et al [74] developed an adaptive control of full penetration for GTAW processes, based on the generalized predictive control (GPC) algorithm presented by Clarke [75][76][77]. The controlled variables are the width and reinforcement of the weld bead, measured by a vision system and a laser stripe.…”

Section: Control Technique or Control Model Referencesmentioning

confidence: 99%

Section: Optimized Welding Processesmentioning

confidence: 99%

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Welding - Modern Topics

Alfaro¹,

Borek²,

Tomiczek³

2021

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The gas metal arc welding (GMAW) process is highly used in industrial production; therefore great efforts are made to select the appropriate procedure to ensure the highest quality. An area of study directly correlated to the quality of GMAW and widely studied is the control of process stability. The objective of this chapter is to present a bibliographical review of the scientific literature related to qualitative and quantitative indexes to evaluate the stability of the GMAW process. The documents present a compilation of the factors that affect stability, stability indexes, and, finally, a synthesis of the study. With a review of the literature, it was concluded that the highest percentage of investigation was aimed at the study of metal transfer stability, specifically with the short-circuit transfer mode. It is also evident that the main processing techniques to develop the indexes were the mathematical formulation; the statistical analysis; image processing; and monitoring of acoustic signals. In this text, the discussion surrounds the papers, the thesis, and other documents found on the theme.

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Numerical simulation of arc and metal transfer behaviors in double-wire gas metal arc welding

Ma²,

Wang³

et al. 2022

Weld World

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A preliminary study on the double cold wire gas metal arc welding process

Cited by 6 publications

References 21 publications

Welding Residual Stresses to the Electric Arc

Welding Residual Stresses to the Electric Arc

Welding - Modern Topics

Numerical simulation of arc and metal transfer behaviors in double-wire gas metal arc welding

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