Page 167 - Demo

PLASMA PROCESSIT/ 1. Circuito di taglio 2. Circuito d%u2019innesco 3. Elettrodo 4. Gas 5. Ugello 6. Arco di taglio 7. MetalloFR/ 1. Circuit de decoupage 2. Circuit d%u2019amor%u00e7age 3. %u00e9lectrode 4. Gaz 5. Bec 6. Arc de decoupage 7. Metal EN/ 1. Cutting circuit 2. Striking circuit 3. Electrode 4. Gas 5. Nozzle 6. Cutting arc 7. MetalES/ 1. Circuito de corte 2. Circuito de cebado 3. Electrodo 4. Gas 5. Inyector 6. Arco de corte 7. MetalDE/ 1. Schneidkreis 2. Z%u00fcndungskreis 3. Elektrode 4. Gaz 5. D%u00fcse 6. Schneidbogen 7. MetallPT/ 1. Circuito de corte 2. Circuito de in%u00edcio 3. C%u00e1todo 4. G%u00e1s 5. Bico 6. Arco de corte 7. MetalPlasma is a strongly ionized gas, that is composed of charged particles, and therefore a conductor of electric current. It can be obtained by passing the gas to be ionized, usually compressed air or inert gas, through an electric arc generated within a mechanical bottleneck. In this way, the concentration of the charged particles formed increases greatly, consequently increasing the thermal eff ect and raising the temperature. The high-temperature gas tends to expand and, as it passes through the bottleneck, it acquires a very high velocity: a concentrated-energy dart of charges is obtained, which can be used to cut metals. A plasma cutting plant can be made by using a current generator with appropriate characteristics, a gas source and a flashlight that channels the gas into a nozzle inside which the electric arc is generated.It is preferable to start cutting the metal object from the free edge of the material. If it is necessary to start \lid,%ution speed of cutting depends on the thickness and type of metal. If the speed is very low, it is diffi cult to obtain a quality cut. The cutting speed depends on many variables and can only be roughly estimated in the case of manual applications. As an indication, two tables of correspondences between cutting speed expressed in centimeters per minute, metal and thickness to be cut, current and nozzle diameter are given.PILOT ARC CUTTING ARC1 23 34 45 57 76