The importance of cutting current and cutting speed of CNC plasma cutting machine

CNC plasma cutting machines are widely used in the modern machinery processing industry. The choice of process parameters has a very important influence on the cutting quality, cutting speed, cutting efficiency and cutting effect. The correct use of CNC plasma cutting machine for high-quality rapid cutting, must be mastered and understood the cutting process parameters. The following is the importance of the numerical parameters of the CNC plasma cutting machine from the aspects of cutting current and cutting speed.
One of the process parameters: cutting current cutting current: it is the most important cutting process parameters, which directly determines the thickness and speed of the cutting, ie the cutting ability.
Impact:
1. The cutting current increases, the arc energy increases, the cutting ability increases, and the cutting speed increases.
2. The cutting current increases, the diameter of the arc increases, and the arc becomes thicker so that the incision becomes wider;
3. When the cutting current is too large, the thermal load of the nozzle increases, the nozzle is damaged prematurely, and the cutting quality naturally decreases, and even normal cutting cannot be performed. Therefore, the cutting current and the corresponding nozzle should be selected correctly according to the thickness of the material before cutting.
Second process parameters: Cutting speed Cutting speed: The optimal cutting speed range can be selected according to equipment instructions or determined by tests, due to the thickness of the material, different materials, high and low melting point, thermal conductivity and surface tension after melting, etc. Factors, the cutting speed also changes accordingly.
main performance:
1. Moderately improved cutting speed can improve the quality of the incision, that is, the incision is slightly narrowed, the incision surface is more even and the deformation can be reduced.
2. If the cutting speed is too fast, the energy of the cutting line is lower than the required amount. The jet in the slit cannot quickly blow off the melted cutting melt to form a large rear drag, accompanied with slag, incision Surface quality declines.
3. When the cutting speed is too low, because the cutting point is the anode of the plasma arc, in order to maintain the stability of the arc itself, the anode spot or anode area must find the conducting current place near the nearest kerf to the arc, and it will also flow toward the jet. Radiating more heat, so that the incision widens, melted material on both sides of the incision gathered and solidified at the bottom edge, forming a slag difficult to clean, and the upper edge of the incision due to excessive melting and heating to form a rounded corner.
4. When the speed is extremely low, the arc will even extinguish due to the wide cut. Thus, good cutting quality and cutting speed are inseparable.
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