Plasma Cutter Machine, Plasma Accessories, Plasma Nozzle 120795 CCW

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Plasma cutting machine matters needing attention

The selection of cutting parameters of CNC plasma cutting machine is very important for cutting quality, cutting speed and efficiency. The correct use of CNC plasma machine for high quality fast cutting, cutting process parameters must be deeply understood and mastered.

1, arc voltage: generally considered the normal output voltage of the power supply is the cutting voltage. Plasma arc cutting machine usually has a high no-load voltage and operating voltage, in the use of high ionization energy such as nitrogen, hydrogen or air, the voltage required to stabilize the plasma arc will be higher. When the current is constant, the increase of the voltage means the increase of the arc enthalpy and the improvement of the cutting ability. If the enthalpy is increased, the jet diameter and the gas flow rate can be reduced, and the faster cutting speed and better cutting quality can be obtained.

2, working gas and the flow: gas including cutting gas and auxiliary gas, some of the equipment but also for gas arc, usually to according to the type of cutting material, thickness and cutting method to select the appropriate work gas. Cutting gas is not only to ensure the formation of plasma jet, but also to ensure the removal of the molten metal and oxide cut. A large gas flow will take more heat from the arc, making jet length becomes shorter, resulted in cutting capacity is decreased and arc instability; too small gas flow the plasma arc lost due to the straightness and the cutting depth shallow, but also easy to produce hang slag; so the gas flow must with cutting current and speed very good cooperation. Now the plasma arc cutting machine mostly rely on gas pressure to control the flow, because when the gun body pore size, control the gas pressure will control the flow. Gas pressure to cut a certain plate thickness is usually chosen according to the data provided by the equipment manufacturer. If there are other special applications, the gas pressure needs to be determined by the actual cutting test. The most commonly used working gases include argon, nitrogen, oxygen, air and H35, argon nitrogen gas mixture, etc..