Prediction and optimization of weld bead geometry in oscillating arc narrow gap all-position GMA welding

Xu, Wangqiong; Lin, Sanbao; Fan, Chenglei; Yang, Chun

doi:10.1007/s00170-015-6818-7

Cited by 71 publications

(26 citation statements)

References 14 publications

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“…Esta melhora diz respeito ao aumento da penetração nas laterais do chanfro ao mesmo tempo em que a penetração na raiz diminui com o aumento da frequência de oscilação resultando, assim, num cordão de geometria mais adequada. Resultados semelhantes também foram obtidos por Xu et al [15,16] ao empregarem parâmetros obtidos por simulação numérica na soldagem de chapas de aço baixo carbono com 25 mm de espessura. Já na soldagem de filete da junta dissimilar composta pelo aço inoxidável AISI 304L e o aço baixo carbono S355MC Tasalloti et al [17] identificaram que o tecimento reduziu a penetração no S355MC e aumentou no 304L.…”

Section: Soldagem and Inspeção 2018;23(1):73-82unclassified

Avaliação do Uso do Tecimento na Soldagem a Arco Submerso

Cunha

Ribeiro

2018

Soldag. insp.

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Este é um artigo publicado em acesso aberto (Open Access) sob a licença Creative Commons Attribution Non-Commercial, que permite uso, distribuição e reprodução em qualquer meio, sem restrições desde que sem fins comerciais e que o trabalho original seja corretamente citado.Recebido: 08 Dez., 2017 Aceito: 04 Abr., 2018 E-mails: t.cunha@ufsc.br (TVC), hormeu@ifsc.edu.br (HOR)Resumo: Apesar de muito comum em diversos processos de soldagem, não se encontra nas aplicações industriais, tampouco na literatura especializada, qualquer referência ao uso do movimento de oscilação transversal do eletrodo na soldagem a arco submerso. Em vista disso, neste trabalho foi realizada uma investigação quanto ao emprego da técnica de tecimento no processo SAW. Para tanto, foram realizados ensaios de soldagem com amplitudes de tecimento (triangular) entre 0 e 30 mm para três níveis diferentes de energia de soldagem e avaliadas a penetração, largura, reforço, área do reforço e da área fundida dos cordões de solda obtidos, além da estabilidade do processo. Como resultado, verificou-se que, além de perfeitamente viável, a aplicação da citada técnica no processo SAW resultou em maior eficiência de fusão no processo, sem, entretanto, acarretar em instabilidades no processo ou problemas relacionados à inclusão de escória.Palavras-chave: Oscilação transversal; SAW; Eficiência de fusão; Morfologia dos cordões. Evaluation of Oscillation Movement in Submerged Arc WeldingAbstract: Although very common in many welding processes, there is no reference in the industrial applications, nor in the specialized literature, to the use of transverse oscillation movement of the electrode in submerged arc welding. In view of this, in this work an investigation was made regarding the use of the weaving technique in the SAW process. Therefore, welding tests with amplitudes of weaving (triangular) between 0 and 30 mm were carried out for three different levels of welding energy and the penetration, width, reinforcement, reinforcement area and melt area of the weld beads obtained were evaluated, besides the stability of the process. As a result, it was found that, in addition to being perfectly feasible, the application of cited technique in the SAW resulted in higher process melt efficiency, without, however, process instabilities or problems related to the inclusion of slag. Key-words:Transverse oscillation; SAW; Fusion efficiency; Weld bead morphology. IntroduçãoO emprego do processo de soldagem a arco submerso (SAW) na construção pesada como em estaleiros, mineradoras, siderúrgicas, fábricas de perfis e estruturas metálicas é algo recorrente. Isto se deve, sobretudo, a capacidade deste processo em atender a uma demanda comum destas empresas, que consiste na união de chapas de maior espessura.Uma característica marcante do processo SAW está no seu elevado rendimento de deposição e de fusão. Isto se deve, fundamentalmente, à inexistência de perdas de material por projeções ou respingos e à menor perda de calor para o meio, o que faz com que o processo aprese...

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Section: Soldagem and Inspeção 2018;23(1):73-82unclassified

Avaliação do Uso do Tecimento na Soldagem a Arco Submerso

Cunha

Ribeiro

2018

Soldag. insp.

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“…Since the groove of NG-GMAW is narrow and deep, the heat loss during the welding process is ignored. And then the heat input per unit length E m can be obtained with the welding wire rotation [12][13][14][15] as shown in Eq. (3).…”

Section: Ng-gmaw Welding Process Modelling Based On Matlabmentioning

confidence: 99%

Parameter Analysis and Optimization of the Rotating Arc NG-GMAW Welding Process

Duan¹,

Wang²,

Lu³

et al. 2018

Int. j. simul. model.

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Parameters of the narrow gap gas metal arc welding (NG-GMAW) method are complex and strongly coupled, which can easily cause welding defects, such as poor sidewall fusion, overlap, gas pore and slag inclusion. So parameter optimization of NG-GMAW is very difficult. The common experimental analysis method is complex, especially take a long time and cost. In this paper, the simulation analysis method is used to analyse NG-GMAW welding process. After the analysis of the NG-GMAW welding mechanism, the dynamic simulation model of the rotating arc NG-GMAW welding process is established firstly. Then, the influence of key process parameters on the welding quality is analysed in detail, which include the rotation angular velocity, rotation angular amplitude, wire feed speed, welding speed, sidewall stay time and so on. The simulation and analysis results illustrate the role and influence of the above parameters. In short, this paper provides a flexible and efficient method for the analysis and optimization of NG-GMAW welding process parameters to discover new phenomena, improve efficiency and save cost.

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“…A large portion of weld quality research has focussed to date on weld gun technology, such as resistive [7,8], gas metal arc [9] and laser [10] for manual operators, automated systems as used by manufacturing robots [11] and weld dynamics, such as spot-weld formations [12] and weld heat distribution [10,13]. However, not much research have been directed towards weld placements.…”

Section: Prior Workmentioning

confidence: 99%

Use of projector based augmented reality to improve manual spot-welding precision and accuracy for automotive manufacturing

Doshi

Smith

Thomas

et al. 2016

Int J Adv Manuf Technol

119

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This paper presents the use of a projector-based spatial augmented reality system in an industrial quality assurance setting to highlight spot-weld locations on vehicle panels for manual welding operators. The aim of this work is to improve the precision and accuracy of manual spot-weld placements with the aid of visual cues as a proactive step by the automotive manufacturer to enhance product quality. The prototype system was deployed at General Motors (GM) Holden plant in Elizabeth, Australia on the production line building Holden Cruze vehicles. Production trials were conducted and techniques developed to analyse and validate the precision and accuracy of spot-welds both with and without the visual cues. A reduction of 52 % of the standard deviation of manual spot-weld placement was observed when using augmented reality visual cues. The average standard deviation with-AR assistance (19 panels and 114 spot-welds) was calculated at 1.94 mm compared to without-AR (45 panels and 270 spot-welds) at 4.08 mm. All welds were within the required specification and panels evaluated in this study were used as the final product made available to consumers. The visual cues enabled operators to spot-weld at a higher degree of precision and accuracy.

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Prediction and optimization of weld bead geometry in oscillating arc narrow gap all-position GMA welding

Cited by 71 publications

References 14 publications

Avaliação do Uso do Tecimento na Soldagem a Arco Submerso

Avaliação do Uso do Tecimento na Soldagem a Arco Submerso

Parameter Analysis and Optimization of the Rotating Arc NG-GMAW Welding Process

Use of projector based augmented reality to improve manual spot-welding precision and accuracy for automotive manufacturing

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