A Study on out-of-phase current pulses of the double wire MIG/MAG process with insulated potentials on coating applications: part I

Motta, Marcelo Ferreira; Dutra, Jair Carlos; Gohr, Raul; Scotti, Américo

doi:10.1590/s1678-58782007000200010

Cited by 4 publications

(5 citation statements)

References 1 publication

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“…When the arc length is increased, the wobble of the arc increases. Further, Motta et of droplets and influences the formation of the melting pool 16) . Thus, it should be noted that it possibly results in an arbitrary droplet transfer position, which decreases the heat (or energy) concentration 17) .…”

Section: Arc Behavior Depending On the Varied Interpass Distancementioning

confidence: 99%

“…In theory, the arc interference due to the prior deposited pass significantly affects the arc stability, because the prior pass changes the shape of the surface where the arc occurs and the droplet is transferred 8,9,15,16) . When the arc is influenced by the prior deposited pass, it bends toward that pass, and the angle between the arc center and width () increases the degree of interference experienced by the following arc due to the prior deposited pass, as illustrated in Fig.…”

Section: Stability Of the Arc Depending On The Variation Inmentioning

confidence: 99%

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Dimension Precision and Uniformability Depending on the Interpass Distance Variation of Automated-Wire Arc Additive Manufacturing using 5 Cr-4 Mo Tool Steel Alloy

Kim

Cheon

et al. 2021

Journal of Welding and Joining

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Die casting molds for aluminum are fabricated using machining billets of tool steels, such as Cr-Mo tool steel. However, this approach has several limitations, including significant material loss and a long lead time. Wire arc additive manufacturing (WAAM) is an alternative fabrication method that yields low material loss and has a short lead time. However, WAAM involves the repetitive stacking of layers based on designed tool paths using CAD/CAM. Thus, the predictability and uniformability of each layer are the most important factors. The interpass distance is an important parameter in a given process; however, studies on the interpass distance of the WAAM process are limited. In this study, it was determined that the interpass distance significantly influences the arc stability owing to the arc interference induced by the variation in distance from the prior deposited pass; more arc interference was observed as the interpass distance decreased. This phenomenon was validated via analysis using a high-speed camera and the variation in the amount of spatter. Furthermore, it was observed that the interpass distance influences the dimensional precision and uniformability. The interpass distance influences the arc interference unless it is greater than 100%. Thus, it is important to determine a point of balance based on the arc stability, dimension predictability, and uniformability of each layer.

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Section: Arc Behavior Depending On the Varied Interpass Distancementioning

confidence: 99%

Section: Stability Of the Arc Depending On The Variation Inmentioning

confidence: 99%

Dimension Precision and Uniformability Depending on the Interpass Distance Variation of Automated-Wire Arc Additive Manufacturing using 5 Cr-4 Mo Tool Steel Alloy

Kim

Cheon

et al. 2021

Journal of Welding and Joining

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“…At first, out-of-phase was used in the process because it was supposed that able to minimize the magnetic interaction between arcs in the twin-wire GMAW process and reaching stable operations. However, Scotti et al [43], Motta et al [44], [45] investigated the effect of the outof-phase current pulses on the behavior of both of metallic transfer modes and voltaic arc configurations. Comparison between in-phase, out-of-phase pulsing and no pulsed setting.…”

Section: Improvement Of Process Control Of the Double-wire 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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“…Moreover, by delaying the pulse end timing of the trailing arc by 0.4-0.5 ms from that of the leading arc, Ueyama et al (2009) work's effectively reduced the arc interference in tandem pulsed gas metal arc welding. Additionally, Motta et al (2007) showed that an inverse phase waveform is not a necessary condition for obtaining satisfactory welding seams. Wang et al (2011) discovered that deceasing the ratio between the leading current and the trailing current could reduce the possibility of arc interruption.…”

Section: Introductionmentioning

confidence: 99%

Symmetrical transition waveform control on double-wire MIG welding

Yao

Xue

Zhou

et al. 2016

Journal of Materials Processing Technology

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A Study on out-of-phase current pulses of the double wire MIG/MAG process with insulated potentials on coating applications: part I

Cited by 4 publications

References 1 publication

Dimension Precision and Uniformability Depending on the Interpass Distance Variation of Automated-Wire Arc Additive Manufacturing using 5 Cr-4 Mo Tool Steel Alloy

Dimension Precision and Uniformability Depending on the Interpass Distance Variation of Automated-Wire Arc Additive Manufacturing using 5 Cr-4 Mo Tool Steel Alloy

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

Symmetrical transition waveform control on double-wire MIG welding

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