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How To Use The Plasma Cutting Machine Correctly

Nov 18, 2017

Correct use of plasma cutting machine:

First, to ensure the correct pressure and flow of plasma

The correct pressure and flow of the plasma are important to the life of consumables. If the pressure is too high, the electrode life will be greatly reduced; pressure is too low, the nozzle life will be affected.

Second, the use of reasonable cutting distance

In accordance with the instructions of the manual, the use of a reasonable cut, cut from the cutting nozzle that is the distance between the surface of the workpiece, when perforated, try to use the normal distance of 2 times the maximum distance or plasma arc can pass the maximum height.

Third, the perforation thickness should be within the allowable range of the machine system

Plasma cutting machine can not exceed the working thickness of the steel perforation, the normal thickness of the perforation of normal cutting thickness of 1/4, the nozzle do not overload the use of

Overloading the nozzle (ie, exceeding the nozzle's operating current) will quickly damage the nozzle. Current intensity should be 95% of the nozzle's operating current is appropriate. For example: 100A nozzle current intensity should be set to 95A.

Fifth, to keep the plasma gas dry and clean

Plasma systems require dry and clean plasma gas to work properly. Dirty gases are often a problem with gas compression systems, which can shorten the life of consumable parts and cause abnormal damage. The way to test the gas quality is to set the torch under test, put a mirror under it and consume the gas inside the torch. If there is water vapor or mist on the mirror, you need to find the cause and correct it.

Six, cutting should start from the edge

Cut as far as possible from the edge rather than piercing. Using the edge as the starting point will extend the life of the consumable, the correct way is to direct the nozzle at the workpiece edge and then start the plasma arc.

Seven, to avoid the extension of plasma arc extension

If the plasma arc is only extended and extended to reach the surface of the workpiece, the plasma arc will cause such stretching and expansion at the beginning and end of cutting, which will cause abnormal nozzle damage. This problem can be avoided by using the right edge-starting technique and selecting the appropriate "broken arc" signal time.

Eight, to reduce unnecessary "arc (or arc)" time

Sparking nozzle and electrode consumption are very fast, before starting, should cutting torch cutting metal walking distance. Nine, in the protective shell smear splash chemical coating

Splash-proof chemical coatings help reduce slag build-up on the protective shell. But be sure to remove the protective cover from the torch before applying a splash-proof coating.

Ten, remove the slag on the protective shell

The slag on the torch casing should always be removed as this slag will cause a destructive, heavy plasma arc.

XI, remove the gas consumption after replacement

After exchanging consumable parts or shutting down for a long time, purge the gas (2-3 minutes is appropriate) to ensure that water and mist are discharged from the torch.

Twelve, try to keep torch and consumables clean

Any dirt on the torch and consumable will greatly affect the function of the plasma system. Replace the consumable parts to be placed on a clean flannel, the torch should always check the connection thread, with hydrogen peroxide detergent electrode contact surface and nozzle cleaning.

Thirteen, remove the oxide on the air or oxygen nozzle

When air or oxygen plasma is selected, oxides can form inside the nozzle, which can affect airflow and reduce consumable life. Wipe the inside of the nozzle with a clean cloth to eliminate oxides.

Fourteen, using demineralized water injection torch

Hard water can cause metal contamination on the nozzle ring, which can affect airflow, reduce torch quality, and reduce consumable life.

Fifteen, check the air flow and cooling flow daily

One of the most common causes of torch damage is the lack of a cooling flow that requires frequent inspection of the torch flow