Finite Difference-Based Conduction Model of Weld Pool for Laser and TIG Welding

2019 ◽  
pp. 177-187
Author(s):  
B. Vikas Kumar Reddy ◽  
S. Murugan ◽  
A. V. G. Reddy ◽  
A. C. Wali ◽  
D. Srivastava
Keyword(s):  
Finite Difference ◽  
Weld Pool ◽  
Tig Welding ◽  
Conduction Model

Influence of the conditions of weld pool protection by argon on the properties of welds in tig welding of titanium

2021 ◽  
Vol 2021 (6) ◽  
pp. 36-40
Author(s):  
V.P. Prilutskyi ◽  
◽  
L.Ye. Yeroshenko ◽  
Keyword(s):  
Weld Pool ◽  
Tig Welding

scholarly journals Analysis and Characterization of the Weld Pool and Bead Geometry of Inconel 625 Super-TIG Welds

Metals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 365
Author(s):  
Jung Hyun Park ◽  
Muralimohan Cheepu ◽  
Sang Myung Cho
Keyword(s):  
Production Rate ◽  
Weld Pool ◽  
Tig Welding ◽  
Fusion Welding ◽  
Inconel 625 ◽  
Bead Geometry ◽  
Weld Bead Geometry ◽  
High Production Rate ◽  
The Difference ◽  
Bead Height

The welding market is changing globally, becoming eco-friendly, robotized and automated. The tungsten inert gas welding (TIG) process is indispensable in industries that require high-quality welds with the absence of spatter and fumes. However, the production rate of TIG welding is very low, which limits its many applications. The present study introduces a novel TIG welding method called super-TIG welding. Super-TIG welding is able to produce a high production rate of welds compared to other fusion welding methods. In super-TIG welding, the novel C-type filler is used, which is different from the conventional TIG welding of circular wire. The relations of the heat input ratio in super-TIG welding to weld pool length and weld bead geometry were measured using the Inconel 625 C-filler. Two types of deposition techniques were used for a bead-on-plate welds, such as stringer beads and oscillation beads. The weld pool and bead geometry measurements are found to be different between stringer beads and oscillation bead techniques. The length of the molten pool and bead size were higher for oscillation beads over the stringer beads. These changes were associated with the difference in heat transfer contact area and bead height.

Stabilization of weld pool through jet flow argon gas backing in C-Mn steel keyhole TIG welding

2017 ◽  
Vol 250 ◽  
pp. 132-143 ◽  
Author(s):  
ZuMing Liu ◽  
YueXiao Fang ◽  
JiaYu Qiu ◽  
MengNan Feng ◽  
Zhen Luo ◽  
...  
Keyword(s):  
Weld Pool ◽  
Jet Flow ◽  
Tig Welding ◽  
Argon Gas ◽  
Mn Steel

Thermal and force effects of the arc on the weld pool in non-consumable electrode (TIG) welding in inert gas mixtures

2016 ◽  
Vol 30 (12) ◽  
pp. 941-944 ◽  
Author(s):  
A. V. Savinov ◽  
I. E. Lapin ◽  
O. A. Polesskiy ◽  
V. I. Lysak ◽  
P. P. Krasikov
Keyword(s):  
Weld Pool ◽  
Gas Mixtures ◽  
Consumable Electrode ◽  
Tig Welding ◽  
Inert Gas

Prediction of Surface Depression of a Tungsten Inert Gas Weld Pool in the Full-Penetration Condition

1995 ◽  
Vol 209 (3) ◽  
pp. 221-226 ◽  
Author(s):  
C S Wu ◽  
L Dorn
Keyword(s):  
Weld Pool ◽  
Dynamic Balance ◽  
Three Dimensional ◽  
Tig Welding ◽  
Inert Gas ◽  
Three Dimensional Model ◽  
Pool Surface ◽  
Full Penetration ◽  
Weld Pool Surface ◽  
Surface Depression

A three-dimensional model is set up to predict the surface depression of a tungsten inert gas (TIG) weld pool in a full-penetration condition in order to find out the relation between pool depression and weld penetration. It solves pool surface depression, fluid flow and heat transfer simultaneously and determines the configuration of a weld pool surface based on the dynamic balance among arc pressure, pool gravity and surface tension at the deformed weld pool surface. In the numerical simulation, difficulties associated with the irregular shape of the deformed weld pool surface and the liquid/solid interface have been overcome by adopting a boundary-fitted non-orthogonal curvilinear coordinate system. A series of data about pool surface depression under different TIG welding conditions are obtained. The validity of the model is verified through TIG welding experiments.

scholarly journals Finite Difference Modeling of Autogeneous Tig Weld Pool Profiles.(Dept.M)

2021 ◽  
Vol 21 (4) ◽  
pp. 1-11
Author(s):  
G. N assef ◽  
M. Abdelrahman ◽  
A. El-Bahi
Keyword(s):  
Finite Difference ◽  
Weld Pool

scholarly journals Numerical Simulation and Industrial Application of High Speed Tandem TIG Welding

2021 ◽  
Author(s):  
Dongsheng Wu ◽  
Jiuling Huang ◽  
Kong Liang ◽  
Xueming Hua ◽  
Min Wang ◽  
...  
Keyword(s):  
Molten Metal ◽  
Weld Pool ◽  
High Speed ◽  
Metal Flow ◽  
Welding Process ◽  
Tig Welding ◽  
Pool Surface ◽  
Weld Pool Surface ◽  
Welding Processes ◽  
Molten Metal Flow

Abstract Self-developed high speed tandem TIG welding equipment were adopted to manufacture titanium welded tubes with high efficiency and high quality. The joint made by this high efficient welding process met Chinese standard requirements. A coupled electrode, arc and weld pool numerical model was also developed to investigate temperature and velocity distributions, and energy propagation of this welding process. The numerical results showed that the Marangoni stress was much higher than the arc shear stress, and was mainly positive after leading and trailing arcs in the x and y directions, so the molten metal flowed backward on the top weld pool surface. Previous studies proposed that a “pull-push” flow pattern defined as a backward molten metal flow after the leading arc and a forward molten metal flow before the trailing arc existed on the top weld pool surface in tandem arc welding processes, while it was not observed in this case. The calculated arc efficiency of the high speed tandem TIG welding was about 79.8%.

scholarly journals Validation of the simplified heat conduction model of EN ISO 52016-1

2021 ◽  
Vol 2069 (1) ◽  
pp. 012136
Author(s):  
G De Luca ◽  
I Ballarini ◽  
F G M Bianco Mauthe Degerfeld ◽  
V Corrado
Keyword(s):  
Heat Conduction ◽  
Finite Difference ◽  
Input Data ◽  
Internal Surface ◽  
Building Energy ◽  
Energy Performance ◽  
Building Energy Efficiency ◽  
Conduction Model ◽  
Heat Conduction Model ◽  
Wide Range

Abstract The issue of improving the building energy efficiency led to the development of calculation methods for the building energy performance assessment. To overcome the low accessibility to detailed input data, the recently introduced EN ISO 52016-1 hourly method is based on assumptions and simplifications chosen to allow a sufficient accuracy in the outcomes with a low amount of input data. Among these assumptions, a simplified mass distribution in the envelope components is considered. In the present work, the hypothesis of the simplified heat conduction model introduced by the EN ISO 52016-1 technical standard and an improved solution provided by its Italian National Annex were evaluated. In particular, the accuracy in the prediction of the internal surface temperature was assessed in comparison with a detailed finite difference conduction algorithm. The validation was performed for 5 opaque component test cases, covering a wide range of areal heat capacity values, by considering both internal and external thermal constraints (e.g. variation of the air temperature). For the structures and boundary conditions considered, results reveal that the standard algorithm allows to predict the internal surface temperatures with a valuable level of accuracy compared to the finite difference algorithm.

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