Overview of Plasma Cutting
Plasma cutters are versatile tools capable of cutting various types of metals. They operate at high temperatures and require compressed air and electricity.
Plasma Cutting Process
- For a mean power level of 11.2 kW and a nitrogen gas flow rate of 25 Nl/min, the torch cuts a concrete plate of 52 mm in thickness with a speed of 20 mm/min and an efficiency of about 30%.
- The torch’s nozzle constricts the pressure of the heated gas running from the tank to create a plasma cut as the electrode interacts with the workpiece.
- The heat of a plasma cutter can reach up to 25,000 degrees Celsius.
Materials and Safety in Plasma Cutting
- Plasma cutters can cut any electrically conductive metal without pre-heating, such as stainless steel, mild steel, aluminum, brass, and copper.
- Materials unsuitable for plasma cutting include manganese, bismuth, lead, and tungsten.
- It is essential to ensure a safe and healthy cutting environment, especially when cutting metals like copper that produce harmful fumes.
Application and Limitations
- Plasma cutting is fast and efficient, making it suitable for various projects when handled correctly.
- The maximum thickness for cutting with a 100-amp plasma cutter is 1.5 inches.
- Compressed air, nitrogen, and oxygen are commonly used gases for plasma cutting.
Plasma Cutting FAQs
What Cannot be cut with a Plasma Cutter?
- Non-conductive materials like wood and plastic cannot be cut with plasma cutters.
Will a Plasma Cutter cut Rebar?
- Plasma cutters can rapidly cut through rebar and other conductive metals without requiring preheating.
Maintenance and Consumable Life
- Consumable parts of plasma cutters typically last 1-3 mechanized cutting hours, with longer durations at lower currents.