1. Research on Arc Length Tracking Control Technology of Tube-Sheet Welding Based on Pulsed TIG
- Author
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Jianhua Ma, Xingdong Wang, Jianyi Kong, Youmin Rong, and Yu Huang
- Subjects
Arc length tracking ,fuzzy control ,sliding filter ,tube-sheet welding ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 - Abstract
During tungsten inert gas welding process, arc length will change due to thermal deformation, uneven surface of workpiece and tungsten electrode loss. Considering the large fluctuation of arc length in all-position annular seam welding under the action of multi-variable coupling, a mathematical model of arc length and arc voltage was established in this paper, and an isolated and high frequency arc voltage acquisition circuit was designed. An improved sliding filtering algorithm was proposed, and after filtering the real-time arc voltage data, fuzzy control algorithm was used to realize the online tracking control of arc length in annular seam welding, in order to improve the reliability and stability of welding quality of tube-sheet. The experimental results show that the dynamic response time of the proposed arc length tracking compensation method is not more than 40 ms, and the arc length tracking deviation is less than 0.2 mm, which can fully meet the requerements of welding seam tracking of tube-sheet welding.
- Published
- 2023
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