A new approach to controlling metal transfer by dynamic modification in gas composition of arc atmosphere: studies on pulsed gas MAG welding***

2021 ◽  
pp. 1-25
Author(s):  
Masahiro Ohara ◽  
Takashi Mizuguchi ◽  
Kanto Miyata ◽  
Tadahisa Tsuyama ◽  
Kohei Fujiwara
Keyword(s):  
Metal Transfer ◽  
Mag Welding ◽  
Gas Composition ◽  
New Approach ◽  
Dynamic Modification

scholarly journals A New Approach to Controlling Metal Transfer by Dynamic Modification in Gas Composition of Arc Atmosphere

2020 ◽  
Vol 38 (4) ◽  
pp. 363-378
Author(s):  
Masahiro OHARA ◽  
Takashi MIZUGUCHI ◽  
Kanto MIYATA ◽  
Tadahisa TSUYAMA ◽  
Kohei FUJIWARA
Keyword(s):  
Metal Transfer ◽  
Gas Composition ◽  
New Approach ◽  
Dynamic Modification

scholarly journals Influence of Metal Transfer Stability and Shielding Gas Composition on CO and CO2 Emissions during Short-circuiting MIG/MAG Welding

2016 ◽  
Vol 21 (3) ◽  
pp. 253-268
Author(s):  
Valter Alves de Meneses ◽  
Valdemar Silva Leal ◽  
Américo Scotti
Keyword(s):  
Short Circuit ◽  
Metal Transfer ◽  
Mag Welding ◽  
Gas Composition ◽  
Breathing Zone ◽  
Shielding Gas ◽  
Residual Concentration ◽  
Average Current ◽  
High Level ◽  
Welding Processes

Abstract: Several studies have demonstrated the influence of parameters and shielding gas on metal transfer stability or on the generation of fumes in MIG/MAG welding, but little or nothing has been discussed regarding the emission of toxic and asphyxiating gases, particularly as it pertains to parameterization of the process. The purpose of this study was to analyze and evaluate the effect of manufacturing aspects of welding processes (short-circuit metal transfer stability and shielding gas composition) on the gas emission levels during MIG/MAG welding (occupational health and environmental aspects). Using mixtures of Argon with CO2 and O2 and maintaining the same average current and the same weld bead volume, short-circuit welding was performed with carbon steel welding wire in open (welder’s breathing zone) and confined environments. The welding voltage was adjusted to gradually vary the transfer stability. It was found that the richer the composition of the shielding gas is in CO2, the more CO and CO2 are generated by the arc. However, unlike fume emission, voltage and transfer stability had no effect on the generation of these gases. It was also found that despite the large quantity of CO and CO2 emitted by the arc, especially when using pure CO2 shielding gas, there was no high level residual concentration of CO and CO2 in or near the worker’s breathing zone, even in confined work cells.

Experimental study on the metal transfer control by using pulsed Ar addition in CO2 arc welding process: studies on pulsed gas MAG welding

2021 ◽  
pp. 1-17
Author(s):  
Kohei Fujiwara ◽  
Tadahisa Tsuyama ◽  
Masahiro Ohara ◽  
Takashi Mizuguchi ◽  
Naoki Mukai ◽  
...  
Keyword(s):  
Experimental Study ◽  
Arc Welding ◽  
Welding Process ◽  
Metal Transfer ◽  
Mag Welding ◽  
Process Studies ◽  
Arc Welding Process

FRACTAL ANALYSIS OF METAL TRANSFER IN MIG∕MAG WELDING

2009 ◽  
Author(s):  
A. P. Vieira ◽  
H. H. M. Vasconcelos ◽  
L. L. Gonçalves ◽  
H. C. de Miranda ◽  
Donald O. Thompson ◽  
...  
Keyword(s):  
Fractal Analysis ◽  
Metal Transfer ◽  
Mag Welding

A new approach for high-yield metal–molecule–metal junctions by direct metal transfer method

2014 ◽  
Vol 26 (2) ◽  
pp. 025601 ◽  
Author(s):  
Hyunhak Jeong ◽  
Dongku Kim ◽  
Pilkwang Kim ◽  
Myung Rae Cho ◽  
Wang-Taek Hwang ◽  
...  
Keyword(s):  
Metal Transfer ◽  
High Yield ◽  
New Approach ◽  
Transfer Method

scholarly journals The effect of metal transfer stability (spattering) on fume generation, morphology and composition in short-circuit MAG welding

2014 ◽  
Vol 214 (7) ◽  
pp. 1388-1397 ◽  
Author(s):  
Valter Alves de Meneses ◽  
João Fernando Pereira Gomes ◽  
Américo Scotti
Keyword(s):  
Short Circuit ◽  
Metal Transfer ◽  
Mag Welding

Energy Parameters of Weld Formation Process in MIG-MAG Welding

2018 ◽  
Vol 927 ◽  
pp. 99-105 ◽  
Author(s):  
Dmitry A. Chinakhov ◽  
S.A. Solodsky ◽  
P.V. Rodionov ◽  
Volodymyr N. Sydorets
Keyword(s):  
Plasma Flow ◽  
Metal Transfer ◽  
Mag Welding ◽  
Arc Plasma ◽  
Energy Characteristics ◽  
Welding Arc ◽  
Transfer Pattern ◽  
Flow Pressure ◽  
Electrode Metal ◽  
Geometrical Dimensions

The article presents results of an experimental study and simulation of the effect of welding arc energy characteristics on the nature of electrode metal transfer in MIG-MAG welding. Based on the research results, a method has been developed for determining the coefficient of welding arc plasma flow pressure. The method makes it possible to take into account the dependence of the electrode metal transfer pattern and plasma flow pressure on geometrical dimensions of a welded joint.

Effect of shielding gas on the metal transfer and weld morphology in pulsed current MAG welding of carbon steel

2018 ◽  
Vol 262 ◽  
pp. 382-391 ◽  
Author(s):  
Yong Zhao ◽  
Xiaojian Shi ◽  
Keng Yan ◽  
Guoqiang Wang ◽  
Zhanjun Jia ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Metal Transfer ◽  
Mag Welding ◽  
Pulsed Current ◽  
Shielding Gas

Effects of Shielding Gas Composition on Metal Transfer Phenomena in High Current GMA Welding

1994 ◽  
Vol 27 (2) ◽  
pp. 42
Author(s):  
Masao Ushio ◽  
Kenji Ikeuchi ◽  
Manabu Tanaka ◽  
Takeshi Seto
Keyword(s):  
Gma Welding ◽  
Metal Transfer ◽  
Gas Composition ◽  
High Current ◽  
Shielding Gas
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