Plasma torch

Abstract

Abstract PURPOSE:To improve the service life of an electrode by making a shape of the electrode cylindrical in a tunnel-shape and besides, providing an orifice to turn auxiliary gas to the upper part of the electrode to stabilize the turning of a plasma arc. CONSTITUTION:The shape of the electrode 8 is made cylindrical in the tunnel- shape and an auxiliary gas supply pipe 21 is formed and besides, the orifice 31 is provided in the same direction as a hole of a fixed ring 6 to the upper part of the electrode. Accordingly, since the turning direction of the auxiliary gas passed through the inside of the electrode is coincident with the turning direction of operating gas, a disturbance does not take place in the flow when the auxiliary gas joins the operating gas. As a result, since the plasma arc 18 is turned stably in the electrode and a generating point of the arc is dispersed uniformly on the surface in the electrode, the partial damage of the electrode 8 does not take place and the service life of the electrode can be prolonged.

Inventors

• 👤 Takayuki Kono
• 👤 隆之 河野
• 👤 Shinsuke Oba
• 👤 大場　真助
• 👤 Hiroshi Fujimura
• 👤 藤村　浩史
• 👤 Eisuke Sakai
• 👤 堺　英輔

Bibliographic Details