Selection of parameters of pulsed current gas metal arc welding

Palani, P. K.; Murugan, N.

doi:10.1016/j.jmatprotec.2005.07.013

Cited by 162 publications

(54 citation statements)

References 9 publications

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“…It can be deduced that the Lorentz force, which is the major electromagnetic force and only changes the direction of charged particles, would constrict the arc plasma in a radial direction, which is called arc constriction. This phenomenon has been proved by experiments [2]. Arc constriction will create a pinched arc plasma [3] during the welding process.…”

Section: Introductionmentioning

confidence: 99%

Arc Shape Characteristics with Ultra-High-Frequency Pulsed Arc Welding

Yang

Zheng

2017

Applied Sciences

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Arc plasma possesses a constriction phenomenon with a pulsed current. The constriction is created by the Lorentz force, the radial electromagnetic force during arc welding, which determines the energy distribution of the arc plasma. Welding experiments were carried out with ultra-high-frequency pulsed arc welding (UHFP-AW). Ultra-high-speed camera observations were produced for arc surveillance. Hue-saturation-intensity (HSI) image analysis was used to distinguish the regions of the arc plasma that represented the heat energy distribution. The measurement of arc regions indicated that, with an ultra-high-frequency pulsed arc, the constriction was not only within the decreased arc geometry, but also within the constricted arc core region. This can be checked by the ratio of the core region to the total area. The arc core region expanded significantly at 40 kHz at 60 A. A current level of 80 A caused a decrease in the total region of the arc. Meanwhile, the ratio of the core region to the total increased. It can be concluded that arc constriction depends on the increased area of the core region with the pulsed current (>20 kHz).

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Section: Introductionmentioning

confidence: 99%

Arc Shape Characteristics with Ultra-High-Frequency Pulsed Arc Welding

Yang

Zheng

2017

Applied Sciences

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“…The control of arc characteristics by appropriate selection of pulse parameters in P-GMAW process is quite critical due to simultaneous influence of relatively large number of parameters on each other during welding. 16,17) It involves the pulse parameters as mean current (I m ), pulse current (I p ), base current (I b ), pulse time (t p ), base time (t b ) and pulse frequency ( f ) as well as arc voltage (V). However, the difficulties in controlling the pulse parameters with respect to appropriate operation of P-GMAW process have been well addressed by considering a summarized influence of pulse parameters defined by a hypothetical factor fϭ[(I b /I p )ft b ] derived from the energy balance concept [1][2][3][4][5]9,11,12,[18][19][20] where, t b ϭ[(1/f)Ϫ t p ].…”

Section: Introductionmentioning

confidence: 99%

Pulsed Current Gas Metal Arc Welding under Different Shielding and Pulse Parameters; Part 1: Arc Characteristics

et al. 2009

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The variation of arc characteristics with respect to its profile under Arϩ2%CO 2 , Arϩ18%CO 2 and argon gas shielding and the stability of gas shielding with variation in pulse parameters have been studied by video-graphy of arc environment during P-GMA weld deposition using mild steel filler wire. The effect of pulse parameters has been studied by considering their hypothetically proposed summarized influence defined by a dimensionless factor, fϭ[(I b /I p )ft b ], mean current and arc voltage. The measured root diameter, projected diameter and length have been measured and correlated to the P-GMA welding parameters under different gas shielding. It has been observed that the arc characteristics with respect to its shape and spreading over the weld significantly vary with f, mean current and arc voltage giving due consideration to the shielding environment. The use of Arϩ2%CO 2 gas shielding appreciably reduces the D R but enhances the D P and L with respect to that observed under Arϩ18%CO 2 and argon gas shielding.

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“…During the process, wire feed speed, which is also the wire speed rate, plays an important role in determining the weld characteristics, and its value must match the melting rate for stable operation [5,6]. Some previous feeders directly regulated the wire feed speed or welding current to make these two parameters match [7,8], and the researches only focused on the relation between current, voltage, and feed speed [9]. In fact, in addition to current and voltage, the wire feed speed is also relative to the peak time, base time, and some other different factors [10].…”

Section: Introductionmentioning

confidence: 99%

Study on the wire feed speed prediction of double-wire-pulsed MIG welding based on support vector machine regression

Yao

Xue

Zhou

2015

Int J Adv Manuf Technol

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Obtaining the wire feed speed which can properly match the process parameters is difficult in double-wire-pulsed metal inert gas (MIG) welding. This work analyzed ten factors which affect the wire feed speed in reality and conducted corresponding correlation analysis. Then, four significant correlation factors, which were duty ratio, frequency, average current of leading wire, and average current of trailing wire, are selected as independent variables for establishing a double-wire feed speed prediction model. The model established by support vector machine regression used two evaluation criterions, which were the mean square error (MSE) and squared correlation coefficient (SCC), and then obtained the optimal model parameters by mesh optimization. Finally, the proposed model was validated by actual double-wire-pulsed welding experiments. This study can optimize the double-wire welding technological designing process and improve the intelligent double-wire welding industry.

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Selection of parameters of pulsed current gas metal arc welding

Cited by 162 publications

References 9 publications

Arc Shape Characteristics with Ultra-High-Frequency Pulsed Arc Welding

Arc Shape Characteristics with Ultra-High-Frequency Pulsed Arc Welding

Pulsed Current Gas Metal Arc Welding under Different Shielding and Pulse Parameters; Part 1: Arc Characteristics

Study on the wire feed speed prediction of double-wire-pulsed MIG welding based on support vector machine regression

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