Arc force and shapes with high-frequency pulsed-arc welding

ABSTRACT

Arc plasma is the source of heat and force for molten pool with dynamics fluid and convections. The arc force is studied with shape surveillance and force measurement during pulsed welding process. The results indicated that the average force increased by 42–57%. And the pressures were 322 Pa (conventional welding), 409 Pa and 517 Pa (pulsed welding). Imaging process is carried out for energy distribution analysis. The core region ratio increased up to 51%, compared with 43.7% by conventional welding. The arc pressure derivation was produced and the error was discussed. The increased arc force happens with arc constriction during pulsed welding. It is supposed to create surface depression of molten pool, enhance the fluidity and improve the heat convections.

KEYWORDS:

• Arc force
• pulsed arc welding
• arc behaviour

Disclosure statement

No potential conflict of interest was reported by the authors.

ORCID

Mingxuan Yang http://orcid.org/0000-0002-1111-4076

Ling Li http://orcid.org/0000-0001-6425-8287

Additional information

Funding

This work was supported by the National Natural Science Foundation of China under grant No. 51405007, No. 51675031 and Fundamental Research Funds for the Central Universities of China. All support from Beijing University of Aeronautics and Astronautics is highly appreciated.