Analysis of active control of metal transfer in modified pulsed GMAW

Chen, M. A.; Wu, Chuansong; Li, S. K.; Zhang, Y. M.

doi:10.1179/174329306x131848

Cited by 27 publications

(18 citation statements)

References 12 publications

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“…One such set of the experiment were the experiments Expt 12 and Expt 25, whose rms value of the coefficients W(3,1), W (3,3), and W (3,4) for the current signals are 0.0968, 0.0555, 0.0281 and 0.0982, 0.0571, 0.0270 (see Table 2), respectively, (for Expt 12 and Expt 25). But their tensile strength differed by a huge amount of 268.4 MPa.…”

Section: Resultsmentioning

confidence: 99%

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Adaptive chirplet transform for sensitive and accurate monitoring of pulsed gas metal arc welding process

Chatterjee

Pal

et al. 2011

Int J Adv Manuf Technol

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Condition monitoring of welding processes have received considerable attention in recent years. The method proposed in this paper provides a novel and a better method for analysis of the weld joint strength, i.e., the adaptive chirplet transform. The presence of the nonlinearities in the various sensor outputs of the monitoring systems of the welding procedure demands a more precise signal processing method for a more accurate analysis of the weld joint strength. The adaptive chirplet method has been used here which produced much better results than the other statistical signal processing methods like the wavelet transform technique due to a better time-frequency resolution of the same. In nonlinear feature extraction, wavelet transform technique was first used to detect the weld joint strength using current as a sensor output during the welding. Then the similar procedure was followed using the adaptive chirplet analysis technique which not only showed better differencing capacity between various signals but also provided better time-frequency resolution for the experimental cases where the wavelet method could not predict the weld joint strength correctly. A thorough laboratory study shows that the diagnostic method proposed in this paper is much more accurate, has high sensitivity with respect to faults, and also has better diagnostic resolution.

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Section: Resultsmentioning

confidence: 99%

“…The area of heat-affected zone (HAZ) has to be reduced to improve the weld quality. The weld quality as well as productivity can be significantly improved using pulsing mode of current in thin sheet metal fabrication industries [3,4]. Current pulsing can refine the grains of weld microstructure [5].…”

mentioning

confidence: 99%

Adaptive chirplet transform for sensitive and accurate monitoring of pulsed gas metal arc welding process

Chatterjee

Pal

et al. 2011

Int J Adv Manuf Technol

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“…Domestic and foreign scholars proposed a new type of multielectrode arc welding technology. Zhang et al [6][7][8][9] at the University of Kentucky proposed double-electrode gas metal arc welding (DE-GMAW), in which a bypass electrode is used to reduce the heat input to workpiece and to ensure the deposition rate. In 2012, Zhang et al [10][11][12][13][14] proposed bypass arcing-wire gas metal arc welding (arcing-wire GTAW), which uses a non-consumable electrode arc of a main road and a consumable electrode arc of a bypass in coupling.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Electrical Characteristics of Inter-wire Arc in Cross-Coupling Arc

Dong

Jiang

et al. 2019

Chin. J. Mech. Eng.

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As a new composite welding heat source introduced in recent years, the cross-coupling arc uses a non-consumable electrode arc (plasma arc) and a consumable electrode arc (inter-wire arc) in cross-coupling, in which the plasma arc is the main arc and the inter-wire arc is the vice arc, to realize the separate control of the heat input to the workpiece, arc force, and droplet transfer. To reveal the electrical characteristics of the inter-wire arc under the action of the plasma arc, in this study, rotating probes are used to sweep across the plasma arc. When the probes rotate into the plasma arc, a circuit is formed, and the electrical characteristics of the inter-wire arc are indirectly analyzed according to the circuit: the probe centering current and input voltage are used as the physical quantities. The results show that at a certain wire feed rate, the inter-wire arc current increases with increasing input voltage. When the input voltage is low, the wire feed rate has no obvious effect on the inter-wire arc current. At a higher input voltage, where the wire feed rate is high, the inter-wire arc current decreases. With the increase in the plasma arc current, the inter-wire arc current first increases quickly and then increases slowly, and simultaneously, the striking arc time becomes longer. With the increase in the interval between the nozzle and the workpiece, the inter-wire arc current increases, but when the arc length increases to a certain limit, the slope of the welding current clearly declines.

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“…Pulsed current Gas Metal Arc Welding (GMAW) is a way to achieve controlled metal transfer. An analytical model was developed for explaining the droplet oscillation and detachment process in pulsed current GMAW [8] - [9]. The oscillation of arc welding was proved to be another method of generating agitations in weld pool.…”

Section: Introductionmentioning

confidence: 99%

A Study of Mechanical Properties of Vibration Assisted Arc Welding Joint

Pavel

Rakib

Habib

et al. 2018

EJERS

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Welding is one of the major aspects of manufacturing as well as mechanical engineering. The strength of the metal joint depends on the type of welding used. Quality of metal joining strength can be improved with a few changes in the regular welding process. A few factors that improve metal jointing strength during the arc welding process had been studied in this paper. Research in welding process shows that Vibration can improve mechanical properties of the joining section. However, welding joint quality varies with different ranges of parameters in different conditions. To analyze those ranges of parameters in some selected conditions, a study has been performed in this paper. Some input parameters like vibration amplitude, vibration frequency, welding speed and electrode angle are selected to analyze the variation in the welded joint. For analyzing the results, output parameters –bending strength and dilution rate are calculated. It has been found that if all input parameters are kept in a selected range then output parameters –bending strength, the percentage of dilution increases than the regular case. Finally, it can be shown that Bending strength and percentage of dilution of a metal joint assisted with vibration shows the better result than without vibration.

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Analysis of active control of metal transfer in modified pulsed GMAW

Cited by 27 publications

References 12 publications

Adaptive chirplet transform for sensitive and accurate monitoring of pulsed gas metal arc welding process

Adaptive chirplet transform for sensitive and accurate monitoring of pulsed gas metal arc welding process

Analysis of Electrical Characteristics of Inter-wire Arc in Cross-Coupling Arc

A Study of Mechanical Properties of Vibration Assisted Arc Welding Joint

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