2017
DOI: 10.3390/app7050503
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On the Visualization of Gas Metal Arc Welding Plasma and the Relationship Between Arc Length and Voltage

Abstract: Abstract:In this article, the camera settings for high-speed imaging of the arc, metal transfer, and weld pool in gas metal arc welding (GMAW) are investigated. The results show that by only changing camera exposure times and the selection of narrow bandpass filters, images that reveal features of the arc such as the iron vapor-dominated region, metal transfer and weld pool behavior can be produced without the need for external light sources. Using the images acquired, the arc length was measured and the relat… Show more

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Cited by 18 publications
(11 citation statements)
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References 25 publications
(65 reference statements)
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“…while it could not be denied that ∆L min had evident positive correlation with ∆L V . Similarly, researchers have previously reported the non-proportional relationship between arc voltage and arc length [19][20][21], while there were also significant positive correlations between arc voltage and arc length. Therefore, it can be inferred that the change of voltage during the base time (∆U) can be used to sense the penetration status which is similar to the amplitude of the weld pool oscillation (described in Section 3.1).…”
Section: The Link Between the Voltage Signal And The Weld Pool Behaviorsupporting
confidence: 57%
See 1 more Smart Citation
“…while it could not be denied that ∆L min had evident positive correlation with ∆L V . Similarly, researchers have previously reported the non-proportional relationship between arc voltage and arc length [19][20][21], while there were also significant positive correlations between arc voltage and arc length. Therefore, it can be inferred that the change of voltage during the base time (∆U) can be used to sense the penetration status which is similar to the amplitude of the weld pool oscillation (described in Section 3.1).…”
Section: The Link Between the Voltage Signal And The Weld Pool Behaviorsupporting
confidence: 57%
“…During the base time, the wire feeding speed was constant, while the wire could not melt, and the length of stick-out wire increased. The increased length of stick-out wire could lead to the arc length compression and the voltage drop over the wire increase, but the conclusion given in papers [13,19] shows that the change in the voltage drop over the wire extension during the base current time did little contribution to the voltage signal. It is commonly accepted that the arc voltage is proportional to the arc length.…”
Section: The Link Between the Voltage Signal And The Weld Pool Behaviormentioning
confidence: 96%
“…When the arc length increases, the voltage will also increase. However, this also depends on the arc current range [42]. The arc length variation was not confirmed since no camera was used.…”
Section: Effect Of Pressure On Process Stabilitymentioning
confidence: 94%
“…Optical images are often used for real-time closed-loop control because of their adequate information. Heralić et al [14,15] detected the height of the deposition layer offline using optical methods, but could not achieve real-time control. Zeng et al [16][17][18] proposed a welding pass-detection method based on directional light and structure-light information fusion, aiming to tackle the problem that the structure-light laser could not obtain the welding pass information stably under the condition of strong mirror reflection.…”
Section: Introductionmentioning
confidence: 99%