A Study on Productivity Improvement in Narrow Gap TIG Welding

Jun, Joong-Hwan; Kim, Sung-Ryul; Cho, Sang-Myung

doi:10.5781/jwj.2016.34.1.68

Cited by 13 publications

(5 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…But due to the lack of productivity its usage is mainly limited to weld root pass, where back side chipping is not possible like in piping industry. To increase the performance of TIG welding process, developments like A-TIG (Activated TIG), T-TIG (Twin TIG), S-TIG (Super TIG), hot filler wire, usage of pulsed heat input, hollow electrode and many others are being carried out 1) . This paper aims to present T-TIG welding process when it is connected with pulsed power source and employed with application of hot filler wire.…”

Section: Introductionmentioning

confidence: 99%

A Review on Twin Tungsten Inert Gas Welding Process Accompanied by Hot Wire Pulsed Power Source

Shah

Agrawal

2019

Journal of Welding and Joining

View full text Add to dashboard Cite

Tungsten Inert Gas (TIG) welding process is used in the industry due to its positional suitability, good control over metallurgical and mechanical properties and weld integrity. It makes this process more suitable to weld the root pass in the piping industries. However, there is a remarkable limitation to increase the welding current beyond a certain limit in the conventional TIG welding process due to limited current carrying capacity of a single electrode and higher arc pressure. This limits its productivity. To combat it, Twin TIG (T-TIG) welding process is introduced where the two tungsten electrodes are present in one torch. The two separate and synchronized power sources are connected to the two electrodes. To increase the metal deposition rate, the hot filler wire is used because it reduces the requirement of heat from arc plasma. There is another advancement in the TIG welding process which incorporates pulsed power source assisted welding process to control weld bead geometry, microstructure and to weld dissimilar material. This paper presents the effect of parameters of T-TIG, hot wire, and pulsed current welding processes when performed separately. A novel welding set up is proposed to weld dissimilar material with weld integrity. This paper suggests that when these three techniques are used simultaneously by meticulous studies of their process parameters with automation, an outperformed technique can be evolved which multiples the individual advantages of the three processes.

show abstract

Section: Introductionmentioning

confidence: 99%

A Review on Twin Tungsten Inert Gas Welding Process Accompanied by Hot Wire Pulsed Power Source

Shah

Agrawal

2019

Journal of Welding and Joining

View full text Add to dashboard Cite

show abstract

“…를 사용하여 용융․적층하는 공정을 개발하였고 57) , 적층 방향에 따른 기계적 물성을 평가하였고, 공정 최적화를 연구 개발 중이다 [58][59][60][61] . welding and milling, part II-optimization of the 3D welding process using an experimental design approach,…”

Section: Pbf Processunclassified

Trend of DED type Additive Manufacturing Technology for Titanium

김¹,

천²

2017

Journal of Welding and Joining

View full text Add to dashboard Cite

Trend of Metal 3D Printing by WeldingJae-Gyu Byun* and Sang-Myung Cho** , † *Dept. of Materials System Engineering, Graduate School, Pukyong National University, Busan 48513, Korea **Dept. of Materials System Engineering, Pukyong National University, Busan 48513, Korea † Corresponding author : pnwcho@pknu.ac.kr (Received June 14, 2016 ; Revised July 13, 2016 ; Accepted July 29, 2016) AbstractMetal AM(Additive Manufacturing) has been steadily developed and that is classified into two method. PBF(Powder Bed Fusion) deposited in the bed by the laser or electron beam as a heat source of the powder material and DED(Directed Energy Deposition) deposited by varied heat source of powder and solid filler material. In the developed countries has been applying high productivity process of solid filler metal based DED method to the aerospace and defense sectors. The price of the powder material is quite expensive compared to the solid filler metal. A study on DED method that is based on a solid filler metal is increasing significantly although was low accuracy and degree of freedom.

show abstract

“…As a short report, the authors did not provided the data for validation their recommendations. In order to increase the productivity in semi-narrow gap welding, the innovative solution was presented in [6] where the super -TIG welding using C-type strip as the filler metal. The chamfer angle is 15°, but the root gap was 10 mm and the thickness of steel plates is up to only 20 mm.…”

Section: Introductionmentioning

confidence: 99%

The evaluation on performance of narrow- gap welding thick steel plates under the influence of main welding parameters

2023

Eureka: PE

View full text Add to dashboard Cite

This work presents the experimental results of narrow gap butt welding of steel plates with large thickness by using the Metal Active Gas (MAG) welding method.The typical defects are accompanied with this process such as the infusion in the side wall and the porosity due to the narrow gap which affect on the melting process. Thus, some publications noted the results of welding for the thickness up to 20−30 mm and the chamfer angle about 30° using GMAW/MIG, GTAW/TIG, SMAW and new development such as laser – arc hybrid, laser multi- pass technique, super -TIG welding etc. But the production requires the solution to save the costs by the reduction of time, labour and investment keeping the standard quality. That is the aim of this study. In order to improve the quality of weld joint and increase the productivity of the process, is it suggested to develop the innovative welding process, in which the welding voltage – Uw, the translational velocity of the tip – Vt, and rotational velocity of the tip – Vr, are changing. This helped to increase the thickness of steel plates up to 50 mm and the chamfer angle decreased at 15°, providing the satisfied quality of the weld. The micrography study serve as the preliminary proof of this hypothesis. The microstructures in 4 regions, such as the weld center zone, heat-affected zone (HAZ), parent metal region, and the boundary between the weld metal and the HAZ were examined. The microstructures of 13 positions from different experiments are investigated using the optical microscope (Axiovert 25).These experiments covered all specific points (node) locating accordingly to three layers from bottom to top of the weld joint . The findings proved the welding quality is similar in case of narrow gap but the chamfer angle is twice lower and the thickness is increased. The result of the study enhances the productivity due to saving the labour cost and the welding materials. It is recommended to consider the effect of other factors (such as cooling conditions, dwell time when the arc approaching the side walls) to optimize the weld quality. There is the huge volume of the heavy steel constructions with the thick steel construction and specific narrow gap in industry. The results of this study with the optimization and more deeper evaluation the influence of main parameters of welding process to eliminate the typical defects will be the valuable reco mmendation for the managers and engineers in the production of metallic constructions

show abstract

A Study on Productivity Improvement in Narrow Gap TIG Welding

Cited by 13 publications

References 5 publications

A Review on Twin Tungsten Inert Gas Welding Process Accompanied by Hot Wire Pulsed Power Source

A Review on Twin Tungsten Inert Gas Welding Process Accompanied by Hot Wire Pulsed Power Source

Trend of DED type Additive Manufacturing Technology for Titanium

The evaluation on performance of narrow- gap welding thick steel plates under the influence of main welding parameters

Contact Info

Product

Resources

About