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Investigation of the relationship between voltage and arc length of K-TIG welding under penetrated condition

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Abstract

Due to the strong requirement of keyhole TIG (K-TIG) welding for arc length stability and the advantages of voltage sensing, it is necessary to discuss the relationship between the voltage and arc length. In this paper, based on several groups of experiments, a nonlinear transition point between the relationship of voltage and arc length was found with increasing arc length. Then, to analyze the formation mechanism of the nonlinear transition, a simplified arc physical model was developed. After considering the variations in the welding parameter, the reduction in arc pressure was found to be the main factor leading to a nonlinear relationship, while the shielding gas flow rate is the most effective parameter. This work lays a foundation for better understanding the welding arc and real-time control of arc length by voltage sensing in K-TIG welding.

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The authors confirm that the data supporting the findings of this study are available within the article. The raw data are available from the corresponding author upon request.

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Acknowledgements

The authors gratefully acknowledge the financial support for this work from the Key Research and Development Program of Guangdong Province (Grant No. 2020B090928003), National Natural Science Foundation of Guangdong Province (Grant No. 2020A1515011050), and the Guangdong Province Marine Economic Development Project (Grant No. GDOE[2019]A13).

Funding

The research leading to these results received funding from the Key Research and Development Program of Guangdong Province (Grant No. 2020B090928003), National Natural Science Foundation of Guangdong Province (Grant No. 2020A1515011050), and the Guangdong Province Marine Economic Development Project (Grant No. GDOE[2019]A13).

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Authors and Affiliations

  1. Guangdong Provincial Engineering Research Center for Special Welding Technology and Equipment, South China University of Technology, Guangzhou, 510640, China

    Jinyi Wang, Yonghua Shi, Yanxin Cui & Zishun Wang

  2. School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, 510640, China

    Jinyi Wang, Yonghua Shi, Yanxin Cui & Zishun Wang

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  1. Jinyi Wang
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  2. Yonghua Shi
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  3. Yanxin Cui
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Correspondence to Yonghua Shi.

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Wang, J., Shi, Y., Cui, Y. et al. Investigation of the relationship between voltage and arc length of K-TIG welding under penetrated condition. Int J Adv Manuf Technol 120, 3843–3857 (2022). https://doi.org/10.1007/s00170-022-09008-3

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