Evaluation of toptig technology applied to robotic orbital welding of 304L pipes

Silva, Régis Henrique Gonçalves e; Schwedersky, Mateus Barancelli; Rosa, Álisson Fernandes da

doi:10.1016/j.ijpvp.2020.104229

Cited by 13 publications

(4 citation statements)

References 13 publications

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“…Welding is an important joining process and is widely employed in the production of diverse engineering and structural applications, the merits of which include simple arrangement, low manufacturing expenses and highly efficient joints [4,5]. In welded components, undesirable weld-induced residual stresses inevitably exist, which are produced by local plastic strains that are formed due to the non-uniform gradient of temperature during the process of welding.…”

Section: Introductionmentioning

confidence: 99%

Distribution and Characteristics of Residual Stresses in Super Duplex Stainless Steel Pipe Weld

Cho,

Lee,

Lee

2024

Metals

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This paper explores the distribution and features of residual stresses formed by super duplex stainless steel pipe welding. Experimental investigations, which encompass an elevated temperature tensile test and metallographic observation along with a hardness test and residual stress measurement, were first conducted to obtain the mechanical properties at high base metal temperatures and to confirm whether or not the duplex stainless steel undergoes martensitic phase development during the welding process. Finally, experiments were performed to scrutinize the residual stress evolution through the metallurgical phase transformation in the weld region and its vicinity. A sequentially coupled 3D thermal, mechanical and metallurgical finite element (FE) model capable of incorporating the experimental consequences was established next. A 3D FE simulation of the girth welding process was conducted, and the axial and hoop residual stress profiles along the girth were evaluated. The results substantiate that martensitic phase evolution occurs in the process of cooling during the welding of super duplex stainless steel, and they also highlight the significance of taking the metallurgical phase transformation into account in the numerical reproduction of the girth welding process for the accurate expression of weld-induced residual stresses, which is especially important for precisely predicting hoop residual stresses.

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Section: Introductionmentioning

confidence: 99%

Distribution and Characteristics of Residual Stresses in Super Duplex Stainless Steel Pipe Weld

Cho,

Lee,

Lee

2024

Metals

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“…Precise control of the torch trajectory is vital to ensure adequate heat input to the sidewall, which plays a crucial role in preventing the occurrence of fusion defects along the sidewall [3]. In this regard, fully automatic welding [4][5][6][7] and seam tracking technology [8][9][10] were proposed as an effective scheme to resolve this problem.…”

Section: Introductionmentioning

confidence: 99%

Implementation of a two-stage algorithm for NG-GMAW seam tracking and oscillation width adaptation in pipeline welding

Liu,

Xue,

Zhou

et al. 2023

Science and Technology of Welding and Joining

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Seam tracking and oscillation width adaptation could effectively reduce the sidewall fusion defects in automatic narrow-gap gas metal arc welding (NG-GMAW). This study proposes a twostage algorithm to realise seam tracking and oscillation width adaptation in NG-GMAW pipeline welding. The first stage involves using the principal component analysis (PCA) eigenvectors to adjust the oscillating centre, enabling seam tracking and oscillation width adaptation for the hot and fill layer. In the second stage, dataset was prepared based on the tracking data from the first stage, which can guide the welding torch trajectory for the cap layer. Experimental results show that the proposed scheme achieves seam tracking and oscillation width adaptation with an accuracy of 0.1 mm.

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“…The monitor and control system were successfully applied to create smooth and consistent weld beads. E Silva et al [14] reported that the TopTIG technique of the GTAW method possesses the advantages of simplicity in operation and trajectory programming. Interestingly, Górka et al [15] studied the orbital TIG welding of titanium tubes with titanium-clad steel.…”

Section: Introductionmentioning

confidence: 99%

Parameter Optimization in Orbital TIG Welding of SUS 304 Stainless Steel Pipe

Minh,

Nguyen,

et al. 2023

Metals

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The influence of welding angle, welding current, travel speed, pulse time, and torch height on the geometry, macrostructure, and mechanical properties of Tungsten Inert Gas (TIG) orbital welding on an SUS 304 stainless steel pipe is investigated in this study. The results show that an electrode angle of 45° produces better weld joints than angles of 30°, 60°, 90°, and 120°. Furthermore, the electrode angle of 30° results in an acceptable weld width but a low depth of penetration (DOP) value. Welding current and weld speed have a significant impact on heat dispersion during TIG welding of an SUS 304 stainless steel pipe. The high welding current may result in blow-hole flaws, particularly near the conclusion of the welding process when heat is accumulated. A long torch height of 2 mm causes unevenness in the weld joints because the arc may be distorted when compared to shorter torch height cases. The pulse time of 0.2 s is too lengthy for a low-welding current situation because it will generate a small weld pool. As a result, the weld pool solidification process speeds up, and porosity emerges in the weld bead. A pulse time of 0.1 s results in a better weld joint. To avoid blow-hole creation, the welding current should be gradually reduced during the process. In addition, the Taguchi results demonstrate that the welding current has the greatest effect on the ultimate tensile strength (UTS) value, followed by welding speed, pulse time, electrode angle, and torch height. Furthermore, the ideal parameters for the UTS value are an electrode angle of 45°, a torch height of 2.0 mm, a welding current of 174 A, a welding speed of 72 mm/min, and a pulse time of 0.3 s.

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Evaluation of toptig technology applied to robotic orbital welding of 304L pipes

Cited by 13 publications

References 13 publications

Distribution and Characteristics of Residual Stresses in Super Duplex Stainless Steel Pipe Weld

Distribution and Characteristics of Residual Stresses in Super Duplex Stainless Steel Pipe Weld

Implementation of a two-stage algorithm for NG-GMAW seam tracking and oscillation width adaptation in pipeline welding

Parameter Optimization in Orbital TIG Welding of SUS 304 Stainless Steel Pipe

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