Plasma is a thermically highly heated and electrically conductible gas that consists of positive and negative ions, electrons as well as stimulated and neutral atoms and molecules. In physics this is often called the 4th state of aggregation.
As plasma gases are used e.g. one-atomic Argon and/or two-atomic gases like hydrogen, nitrogen, oxygen and air.
These plasma gases ionise and dissociate through the energy of the plasma arch.
By recombination of atoms and molecules outside the beam generating system the absorbed energy is abruptly set free and reinforces the thermic impact of the plasma beam on the work piece.
As a rule, the plasma is additionally constricted by a water-cooled nozzle. Thereby an energy density of up to 2 x 106 W/cm² can be achieved in the plasma beam. Due to the high temperature, the plasma expands and flows with supersonic speed towards the work piece (anode). In the plasma arch, temperatures of up to 30,000 °C are created that allow, in connection with a high kinetic energy portion of the plasma beam, very high cutting speeds on all electrically conductible materials, depending on material thickness.
For the cutting process first a pilot arch between nozzle and cathode is ignited by means of high tension. This low energy pilot arch prepares the distance between plasma burner and work piece by partial ionisation. As soon as the pilot arch touches the work piece (flying start of cutting or piercing), the main arch is induced by an automatic increase in performance.
Advantages of plasma technology
- Cutting of all metallic electrically conductible materials
- Second to none when cutting high alloyed steels in medium thickness range
- Excellent suitability in thin and medium ranges
- Cutting of high quality steels with low heat balance
- High cutting speeds
If you wish further information on our processing facilities, please have a look at our menu further processing. There you will also find further specifications particularly of our CNC controlled fine jet plasma plant. .
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