So it acts as a cathode. Diagram Of Plasma Welding Circuit Plasma-arc welding is a substitute of TIG Arc Process, offering greater welding speed and better weld quality, for welding thin metal section current at 0.1A below the range of the TIG Arc. What do the most common plasma arc cutting torches us during cutting or welding? A plasma is a gas which is heated to an extremely high temperature and ionized so that it becomes electrically conductive. The electric arc is used to ionise the gas in the torch and create the plasma, which is then pushed through a fine bore hole in the anode to reach the base plate. Construction Of Plasma arc Machining : • The schematic arrangement of plasma arc machining is shown in Fig. Slag Re-solidified parts of molten metal that adheres to the underside of the cut. Plasma Arc Welding. The metal to be welded is melted by the intense heat of the arc and fuses together. • The plasma arc cutting torch carries a tungsten electrode fitted in a small chamber. Non-transferred arc mode: In the non-transferred mode, the current flow is from the electrode inside the torch to the nozzle containing the orifice and back to the power supply.It is used for plasma spraying or generating heat in nonmetals. Keyword: Peak current, background current, pulse frequency, hot wire GTAW, plasma arc welding, transferred and non-transferred arc welding, 16.1 Selection of pulse parameters Plasma Arc Welding (PAW) Plasma arc welding (PAW) is an arc welding process utilizing heat generated by a compressed arc between a tungsten non-consumable electrode and workpiece (transferred arc process) or water-cooled constricting nozzle (non-transferred arc process). So that the full voltage (potential) and current are not available How is the torch current circuit designed in the torch between the electrode and nozzle? The arc is started between the electrode and the tip of nozzle. PLASMA ARC RAYS Plasma Arc Rays can injure your eyes and burn your skin. • This electrode is connected to the negative terminal of a DC power supply. Additionally, basic principle of plasma arc welding has been described with help of suitable schematic diagrams. Nov 24, 2015 - Tig Schematics and components ST500F1200-30EE In plasma cutting, is formed when an electric arc heats and ionizes a stream of high-pressure gas. The plasma arc welding process is normally compared to the gas tungsten arc process : The plasma torch contains an electrode made out of tungsten fixed in a nozzle which is made of copper . Similar to GTAW (Tig), the plasma arc welding process uses this plasma to transfer an electric arc to a work piece. How Plasma Welding Works. • To protect your eyes, always wear a welding … Then the arc or flame is transferred to the material to be welded. The plasma arc process produces very bright ultra violet and infra red light. 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