Process Characteristics of Inverter Type GMAW Power Source Under Static and Dynamic Operating Conditions

Devakumaran, K.; Rajasekaran, N.; Ghosh, P. K.

doi:10.1080/10426914.2012.663149

Cited by 17 publications

(8 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The voltage (V) -current (I) characteristics of the power source may also change and accordingly influence the performance of the HW-GTAW process. Though many research work has been carried out on evaluating the V-I characteristics and its influence on weld quality in conventional GTAW 5,6 , studies on HW-GTAW process are rather sparse 7 . The reason being, HW-GTAW can be carried out only in automated or mechanised conditions which can exercise control over welding parameters like arc voltage (V), wire feed rate (WFR), hot wire current (I hot ) and welding current (I) to provide a desired stable arc under dynamic operating conditions of welding.…”

Section: Introductionmentioning

confidence: 99%

A Study on Process Characteristics and Performance of Hot Wire Gas Tungsten Arc Welding Process for High Temperature Materials

Mr¹,

Kandasamy

2016

Mat. Res.

View full text Add to dashboard Cite

Hot wire gas tungsten arc welding (HW-GTAW) process is the one where the filler wire is preheated close to its melting point before it is fed in to the arc. The effect of HW-GTAW parameters such as welding current, hot wire current and the wire feed rate during welding of super ASS 304H stainless steel tubes were evaluated in terms of heat input, voltage-current (V-I) characteristics and weld bead characteristics such as bead weight and geometry. The results obtained indicate that for a constant welding current, increasing the hot wire current and wire feed rate provides a stable V-I characteristics and higher bead weight. Further, increasing the hot wire current and wire feed rate also provides better or desired weld pool and hence the bead geometry was described in terms of width, penetration depth, area of fusion and toe angle. By utilising the above knowledge, the tube to tube butt welding of SS 304H material was carried out. It was observed that, the weld joint is qualified as per the quality requirement of ASME: Sec IX standard.

show abstract

Section: Introductionmentioning

confidence: 99%

A Study on Process Characteristics and Performance of Hot Wire Gas Tungsten Arc Welding Process for High Temperature Materials

Mr¹,

Kandasamy

2016

Mat. Res.

View full text Add to dashboard Cite

show abstract

“…This is essentially because it not only offers high efficiency but is concurrently low in cost and efficient in output [1]. In recent years, stability of the welding process, which exerts an influence on both the formation of the weld bead and its quality, is of primary concern in its extended application and use in the industry [2]. During the period of progressive research and development, few to several research studies have made a conscious attempt to both evaluate and control the welding process.…”

Section: Introductionmentioning

confidence: 99%

An Analysis of Gas Metal Arc Welding Using the Lyapunov Exponent

Zhang

et al. 2013

Materials and Manufacturing Processes

View full text Add to dashboard Cite

The characteristics of chaos are unique to the technique of gas metal arc welding (GMAW), which can be safely classified as being a nonlinear process. In this article, salient aspects relevant to the development and use of computational technique to accurately calculate the maximum Lyapunov exponent of the welding processes for different parameters is presented and discussed. The maximum Lyapunov exponent is then used to evaluate stability of the welding process while concurrently aiding in the selection of the welding parameters. Careful analysis of the results reveals overall chaos to exist in the gas metal arc welding process for the different droplet transfer modes. Overall stability of the welding process is related to the chaos that is generated and exists. The maximum Lyapunov exponent can be safely used as a valid criterion for evaluating the stability of the welding process. This aids in the selection of an optimized welding parameter for the welding process to form a weld bead that has both quality and integrity.

show abstract

“…The difference between P-GMAW and DP-GMAW processes is the current waveform. During the DP-GMAW process, the current waveform is composed of a rhythmic thermal pulse phase (TPP) and a thermal base phase (TBP) [7], which have different frequencies and amplitudes, and the sum of durations of the two phases is equal to a thermal period (TP) [8]. Because of the existence of double pulses, it was also been named the twin-pulsed GMAW process in some published literature.…”

Section: Introductionmentioning

confidence: 99%

Process and Parameter Optimization of the Double-Pulsed GMAW Process

Yao

Zhou

Huang

2019

Metals

View full text Add to dashboard Cite

The double pulsed gas metal arc welding (DP-GMAW) process has been effectively employed to realize joining of steel plates and obtain weld bead surfaces with high quality fish scale ripples. In this work, a DP-GMAW process based on robot operation using the latest twinpulse XT DP control technology was employed to join the stainless-steel base plates. Four key operational parameters, which were robot welding speed, twin pulse frequency, twin pulse relation and twin pulse current change in percent, were selected to be input elements of orthogonal experimental design, which included nine experiments with three levels. To accurately understand the performance and process of weld bead obtained from DP-GMAW operation based on robot operation, the appearance observation and key shape parameters measurement, microstructure analysis, tensile and hardness testing, as well as stability analysis of the electrical signals, were conducted. Correlation analysis showed that the grain size was significantly correlative to the toughness and hardness. Then, to obtain quantitative evaluation results, fuzzy comprehensive evaluation (FCE) was employed to provide quality evaluation of weld beads from the above experiments. The influential levels of the key operational parameters on the appearance, grain size and FCE scores, and corresponding physical analyses, were respectively presented. In addition, optimal parameters combinations for obtaining weld beads with optimal appearance, grain size, and the highest FCE scores of weld bead quality were respectively provided according to the range analysis of the results from orthogonal experimental design. This work can provide an effective analysis method of influential levels of key operational parameters on the performance of the weld bead, optimal operational parameters combination seeking method, and quantitative quality evaluation method for the DP-GMAW process, which can improve the process optimization and increase the production efficiency, both in academic research and actual industrial production.

show abstract

Process Characteristics of Inverter Type GMAW Power Source Under Static and Dynamic Operating Conditions

Cited by 17 publications

References 13 publications

A Study on Process Characteristics and Performance of Hot Wire Gas Tungsten Arc Welding Process for High Temperature Materials

A Study on Process Characteristics and Performance of Hot Wire Gas Tungsten Arc Welding Process for High Temperature Materials

An Analysis of Gas Metal Arc Welding Using the Lyapunov Exponent

Process and Parameter Optimization of the Double-Pulsed GMAW Process

Contact Info

Product

Resources

About