The plasma cutting process is a thermal cutting method. Which means that is uses heat to melt the metal instead of mechanically cutting it.
Plasma cutters use compressed air or other gases, such as nitrogen to create plasma. When high-pressure, low-temperature gases come into contact with an electrode they ionize to create more pressure. Eventually, the build up of these ions leads to a stream of plasma being pushed towards a cutting head.
The cutting tip constricts the flow to create a stream of plasma. This is then subjected to the workpiece. As plasma is electrically conductive, the workpiece is connected to the ground through the cutting table.
As the plasma arc contacts the metal, its high temperature melts it. At the same time, the high speed gases blow away the molten metal.
Advantages of Plasma Cutting
Plasma Cutting is cheaper compared to laser or water-jet cutting. Also, the operational requirements for Plasma cutting are relatively low and inexpensive.
Fast production rate
One of the main advantages of going through Plasma Cutting is its quickness. It can cut materials from 60 to 200 inches per minute. It is the fastest cutter if compared to a laser which comes second and the water-jet comes in as slowest. It has a short preparation time because there is no need to pre-heat the metal. It is efficient and it will assure that the work is done on time.
Quality and Flexibility
Plasma cutting can be used to cut any thick and stacked materials. This method can also be used for bevelling, shape cutting, gouging, and piercing. It gives out a clean-cut finish, especially with small and medium-size thicknesses.