Experimental investigation of magnetic arc blow in plasma arc cutting | Zendy

Yoshihiro Yamaguchi | Zendy; Yusuke Katada | Zendy; Takeru Itou | Zendy; Yoshihiko Uesugi | Zendy; Yasunori Tanaka | Zendy; Tatsuo Ishijima | Zendy

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Experimental investigation of magnetic arc blow in plasma arc cutting

Author(s) -

Yoshihiro Yamaguchi,

Yusuke Katada,

Takeru Itou,

Yoshihiko Uesugi,

Yasunori Tanaka,

Tatsuo Ishijima

Publication year - 2014

Publication title -

welding in the world

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.632

H-Index - 36

eISSN - 1878-6669

pISSN - 0043-2288

DOI - 10.1007/s40194-014-0177-0

Subject(s) - materials science , magnetic field , arc (geometry) , plasma cutting , plasma , plasma arc welding , nozzle , arc blow , electric arc , mechanics , composite material , electrode , submerged arc welding , mechanical engineering , metallurgy , physics , engineering , heat affected zone , quantum mechanics , welding

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

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