Magnetic Control of Arc Plasma and its Modelling

Nomura, Kazufumi; Morisaki, Kazuyuki; Hirata, Yoshihiro

doi:10.1007/bf03266730

Cited by 27 publications

(14 citation statements)

References 4 publications

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“…The D / W ratio was increased using the EMF-TIG welding method because the resulting penetration was deeper while the upper bead's width decreased. This is in line with Nomura et al [21]. The highest D/W ratio was reported under EMF-TIG than conventional TIG in welding currents of 105 A.…”

Section: The Geometric Shape Of Conventional and Emf-tig Weldssupporting

confidence: 91%

Effect of Magnetic Field Induce Arc in Autogenous TIG Welding of 304 Stainless Steel Butt Joint

Haikal

Chamim

Andriyansyah

et al. 2021

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This paper reports the use of External Magnetic Field-Tungsten Inert Gas (EMF-TIG) method in butt joint applications to determine the effect of welding arc compression on the quality of butt joint of SS 304 thin plate was reported. The welding process was performed without using filler or autogenous welds. The external magnetic field was generated by placing a magnetic solenoid around the TIG welding torch. The results of this study showed that EMF-TIG welding can produce a more uniform bead width along the weld line compare with conventional TIG. Moreover, the D/W ratio obtained under external magnetic field was higher than without magnetic. However, the tensile strength of butt joint decreased with EMF-TIG because there is constriction in arc welding which produces shrinkage weld pool volume. In addition, high welding speeds result in a decrease in the tensile strength of both conventional TIG and EMF-TIG welds.

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Section: The Geometric Shape Of Conventional and Emf-tig Weldssupporting

confidence: 91%

Effect of Magnetic Field Induce Arc in Autogenous TIG Welding of 304 Stainless Steel Butt Joint

Haikal

Chamim

Andriyansyah

et al. 2021

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“…Darker blue means lesser magnitude, hence cross-combination having a bigger magnitude of magnetic field compared to the square combination. The square-combination configuration in Figure 5 was similar to the configuration proposed by Nomura et al [26,27]. The difference was in the sequence pole.…”

Section: Simulations and Predictionssupporting

confidence: 59%

Study of Cross-Combination and Square-Combination Configuration Magnetic Field on Tungsten Inert Gas Welding

Baskoro¹,

Amat²,

Arisoni³

2021

IJAME

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In this study, cross-combination and square-combination configuration of the permanent external magnet were used in tungsten inert gas welding process. The external magnetic field effect to the arc plasma was observed using two cameras from the front view and side view. The depth of penetration and weld profile was investigated after welding. In this study, two types of magnets were employed; a 3 mm magnet with intensity ranging from 270-280 mT and a 5 mm magnet with 400-415 mT. Each configuration has three sub-configurations: forward, backward, and side, so there were 12 parameters in this study. The result shows that a cross-combination 5 mm magnet can increase weld penetration in any position, forward, backward or side deflection, and improve the depth-to-width ratio, however using 3 mm magnet did not influence the penetration significantly. Cross-combination has more stiffness and stability of the arc than square-combination. Most configurations have the same size weld bead width. Square combinations had fluctuated result, stiffness and stability of the arc was poor. This investigation aims to enlarge our understanding of the magnetic field effect on the arc plasma and the weld profile. In future, the arc blow effect from the external magnetic field can be controlled and regulated to improve TIG welding performance.

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“…Also, the circular section of the arc has been transformed into an elliptical section. The use of high-performance permanent magnets, arranged around the GTAW torch, improved the appearance of the bead at high speeds of welding, in addition to changing the bead width and modifying the depth/width ratio [9,[15][16][17]. The parameters that can be regulated for the magnetic field generated by the permanent magnets are the angle and direction of this field.…”

Section: Introductionmentioning

confidence: 99%

Device Design for Electric Arc Electromagnetic Constriction

Antonello

Bracarense

2020

Soldag. insp.

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The difference of potential between two electrodes results in electric current breaking the dielectric barrier of the gas in this space causing a plasma discharge called electric arc. As a result, there is luminosity and an increase in temperature. Electric arc is used for welding and usually one of the electrodes is cylindrical with small diameter and the other with large area. Because of this configuration, the side section of the electric arc has a bell shape and forms a circular impression in contact with the work piece (the weld pool). With the use of electromagnetic forces, it is possible to change this circular impression, completely changing the behavior and consequently the geometry of the weld pool. This article presents the development and construction of a device for the electromagnetic constriction of the electric arc, capable of changing the cross section of the impression from circular to elliptical. The steps performed in the article were the simulation of the electromagnetic fields generated to change the electric arc shape, the development of the arc constriction device and the application of this electromagnetic constriction in beads on plate. The results show that the electromagnetic forces change the transverse profile of the arc from circular to elliptical, enabling the increase in specific power and a more precise orientation of the electric arc. Also, changing the orientation of the ellipse results in different penetration and width of the bead.

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Magnetic Control of Arc Plasma and its Modelling

Cited by 27 publications

References 4 publications

Effect of Magnetic Field Induce Arc in Autogenous TIG Welding of 304 Stainless Steel Butt Joint

Effect of Magnetic Field Induce Arc in Autogenous TIG Welding of 304 Stainless Steel Butt Joint

Study of Cross-Combination and Square-Combination Configuration Magnetic Field on Tungsten Inert Gas Welding

Device Design for Electric Arc Electromagnetic Constriction

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