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Plasma Cutting Machine In The Operation Of The Specification
Jul 01, 2017

Plasma cutting machine in the operation or there are some operational norms need to comply with, mainly in the following:

1, no-load voltage and arc column voltage

Plasma cutting power supply, must have a high enough no-load voltage, in order to easily arc and make the plasma arc stable combustion. No-load voltage is generally 120-600V, while the arc column voltage is generally half of the no-load voltage. Increasing the arc column voltage significantly increases the power of the plasma arc, thereby increasing the cutting speed and cutting the larger thickness of the sheet metal. The arc column voltage is often achieved by adjusting the gas flow rate and increasing the internal shrinkage of the electrode, but the arc column voltage can not exceed 65% of the no-load voltage, otherwise the plasma arc will be unstable.

2, cutting current

Plasma cutting machine to increase the cutting current can also increase the power of the plasma arc, but it is subject to large allowable current, otherwise it will make the plasma arc column thicker, slot width increases, the electrode life decreased.

3, gas flow

Increasing the gas flow can improve the arc column voltage, but also enhance the compression of the arc column leaving the plasma arc energy is more concentrated, the spray force is stronger, which can improve the cutting speed and quality. But the gas flow is too large, but will make the arc column shorter, loss of heat increased, so that cutting capacity weakened until the cutting process can not be normal.

4, the electrode shrinkage

The so-called shrinkage refers to the distance from the electrode to the tip of the nozzle, the appropriate distance can make the arc in the cut mouth to get a good compression, access to energy concentration, high temperature plasma arc and effective cutting. Plasma cutting machine is too large or too small, will cause serious damage to the electrode, cut mouth burned and cut capacity decreased. Internal shrinkage generally take 8-11mm.

5, cut mouth height

Plasma cutting machine The tip height refers to the distance from the cutting tip to the surface of the workpiece. The distance is generally 4 ~ 10mm. It is the same as the electrode shrinkage, the distance should be appropriate to give full play to the plasma arc cutting efficiency, otherwise it will cut the cutting efficiency and cutting quality or cut the mouth burned.