Plasma Cutter(Air plasma cutting)Plasma Cutting Machine Archives

Plasma cutting is the use of plasma gas to transfer energy to conductive workpiece materials. Plasma gases are usually formed by pushing gases (such as nitrogen,argon,or even air) through narrow nozzles. The current generated by an external power source provides enough energy to ionize the stream, turning it into a plasma arc at temperatures approaching 40,000 ˚F. The plasma arc cuts by melting the workpiece and will blow away the molten metal.

Plasma cutting system consists of two parts: power supply and cutting torch.

Power Supply - The machine input voltage is usually 220V to 415V. The output current (amperes) and total power rating of the power supply determine the system's ability in terms of cutting speed and cutting thickness. The main role of the power supply is to provide the appropriate energy to continue to maintain the plasma arc after ionization.The high voltage forms a high-energy arc inside the cutting torch, which ionizes the gas and generates plasma.

Cutting torch - The cutting torch is used to secure wearing parts such as nozzles and electrodes and to cool these parts (air or water cooling). The nozzles and electrodes are used to compress and hold the plasma jets.

For machine cutting applications, the cutting machine can be programmed using plasma cutting software. In some cases, CNC controller software can be used to program individual parts or small batches of parts, simplifying the job of machine operators and increasing production efficiency.

Doughty Welder range of air plasma cutting machines offers the following advantages :

- It can cut almost any type of metal：including mild steel, carbon steel, stainless steel, cast iron, aluminum, copper, brass, etc. It can also handle rusted, painted and mesh metal workpieces. You can cut thick metal as well as thin metal : the range is between 6mm and 70mm.

- Portable and reliable: The frequency converter in our air plasma cutting machines is very lightweight and therefore very portable. Some machines can be powered by generators to provide good performance. There are also machines with built-in air compressors that can be used directly after being plugged into electricity.

- Lower operating costs: The cost per part is lower because you don't have to worry about refilling and transporting flammable gas cylinders.

- Precise cutting: Plasma cutters will enable more precise and cleaner cuts with better angles, thinner slits, smaller heat-affected zones and a complete absence of slag.

- Easier to use: The plasma process is more fault tolerant and easier to master.