1. Cutting current
It is the main technical parameter of the cutting process, which directly affects the thickness and speed of the cutting, that is, the cutting ability. The larger the cutting current, the higher the cutting capacity, the higher the cutting speed, the higher the spacing of the cutting openings, the faster the damage to the cutting nozzle, and the higher the cost. Therefore, the cutting current should be used correctly according to the thickness of the material before cutting.
2. Cutting speed
The range of cutting speed can be selected according to the equipment description or determined by inspection. Taking into account the thickness of the material, the difference of the selected material, the melting point, the thermal conductivity and the surface tension after melting, the cutting speed is also corresponding. The change. The level of speed will directly affect the quality of cutting, higher and lower are not good.
3. Arc voltage
Generally speaking, the normal output voltage of the power supply refers to the cutting voltage. Plasma cutting machines basically have higher no-load voltage and working voltage. When the current is constant, the continuous increase of the voltage means the continuous improvement of the arc enthalpy value and the improvement of the cutting ability. If the enthalpy value is increased and the diameter of the jet is reduced and the flow rate of the gas is increased, a faster cutting speed and better cutting quality can often be obtained.
4. Cutting power density
In order to obtain a highly compressible plasma arc cutting arc, the cutting nozzles use a smaller nozzle diameter, a longer channel length and further enhance the cooling effect, which can increase the current passing through the effective section of the nozzle. , that is, the power density of the arc increases.
Increasing the compression degree of the arc can extend the high-temperature plasma jet to form a more balanced high-temperature area, and increase the speed of the jet, which can reduce the gap between the upper and lower cuts. Therefore, the excessive compression of conventional nozzles often causes double arcing, which not only consumes the electrode and the nozzle, making the cutting process impossible, but also causes the quality of the incision to decline. In addition, excessive cutting speed and excessive nozzle height will definitely lead to an increase in the gap between the upper and lower cuts.