Experimental investigation of magnetic arc blow in plasma arc cutting

Oxygen plasma arc cutting is widely employed in various industrial fields. In the case of cutting magnetized plates, the magnetic field is concentrated around the cutting front as cutting progresses, and the electromagnetic force induced by the leakage of magnetic field deflects the plasma jet. The...

Full description

Saved in:
Bibliographic Details
Published inWelding in the world Vol. 59; no. 1; pp. 45 - 51
Main Authors Yamaguchi, Yoshihiro, Katada, Yusuke, Itou, Takeru, Uesugi, Yoshihiko, Tanaka, Yasunori, Ishijima, Tatsuo
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.01.2015
Subjects
Online AccessGet full text

Cover

Loading…
More Information
Summary:Oxygen plasma arc cutting is widely employed in various industrial fields. In the case of cutting magnetized plates, the magnetic field is concentrated around the cutting front as cutting progresses, and the electromagnetic force induced by the leakage of magnetic field deflects the plasma jet. The deflected plasma jet leads to poor cutting quality and sometime causes damage to the electrode and nozzle because of double arc abnormal discharge. This phenomenon is called magnetic arc blow, and it is a critical issue when applying plasma cutting on magnetized plates. In this study, magnetic arc blow behavior is investigated, and a method to prevent it is devised. We examined the relationship between operating conditions and the double arc using external magnetic fields on a plasma jet. We found criteria regarding operation conditions that induce arc blow. In addition, we succeeded in suppressing the double arc caused by the leakage external magnetic field by using a magnetic shield cap composed of ferromagnetic material around the nozzle.
ISSN:0043-2288
1878-6669
DOI:10.1007/s40194-014-0177-0