Chinese Journal of Mechanical Engineering >

2018 , Vol. 31 >Issue 6: 96 - 96

DOI: https://doi.org/10.1186/s10033-018-0297-3

Intelligent Manufacturing Technology

Gas Pool Coupled Activating TIG Welding Method with Coupling Arc Electrode

  • Yong Huang ,
  • Rui-Lin Liu ,
  • Yan-Zhao Hao
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  • 1. State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China;
    2. Department of Aviation Manufacture Engineering, Chengdu Aeronautic Polytechnic, Chengdu 610100, China;
    3. Technology Center, Great Wall Motor Company Limited, Baoding 071000, China

Received date: 2016-10-19

  Online published: 2019-07-23

Supported by

Supported by National Natural Science Foundation of China (Grant No. 51265029)

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Abstract

Gas pool coupled activating TIG (GPCA-TIG) welding put forward in-house can dramatically enhance weld penetration of TIG welding through introducing active element oxygen to reverse the Marangoni convection flow in the molten pool. In order to further improve the welding productivity, the normal solid tungsten electrode is replaced by a kind of coupling arc electrode. The changes of arc pressure distribution along anode surface and the weld appearance were evaluated. On this basis, the dependences of weld shape characterized with weld depth, width and undercut on the main welding parameters were discussed. The results indicate, the substitution of coupling arc electrode can lead to an obvious decrease of arc pressure. Compared to hollow tungsten electrode and twin tungsten electrodes, the coupling arc electrode is much easier to manufacture and has more compacter structure. Combined with the symmetric distribution of arc pressure in different directions, this electrode has extensive adaptability. In the GPCA-TIG welding with coupling arc electrode, both the substitution of coupling arc electrode and the introduction of outer active gas oxygen can reduce the possibilities of producing humping bead and undercut. Their joint action makes this welding method have the capability of realizing high travel speed and deep penetration welding.

Key words： GPCA-TIG welding; Coupling arc electrode; Oxygen; Arc pressure; Weld shape; Welding parameter

Cite this article

Yong Huang , Rui-Lin Liu , Yan-Zhao Hao . Gas Pool Coupled Activating TIG Welding Method with Coupling Arc Electrode[J]. Chinese Journal of Mechanical Engineering, 2018 , 31(6) : 96 -96 . DOI: 10.1186/s10033-018-0297-3

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