principle of CNC plasma cutting machine


CNC plasma cutting machines are widely used in the metal cutting industry for their ability to cut through a wide range of materials with high precision and speed. But how do these machines work? In this article, we will explore the principle behind CNC plasma cutting machines.

  • Firstly, let's define plasma. Plasma is a state of matter that is created when gas is ionized by heating it to extremely high temperatures. When gas is heated to such high temperatures, its atoms begin to break apart, releasing free electrons that collide with other atoms, creating a plasma state.

 

  • CNC plasma cutting machines work by using this plasma state to cut through metal. The machine has a plasma torch that is connected to a computer numerical control (CNC) system. This system controls the movement of the plasma torch to create precise cuts in the metal.

 

  • The plasma torch consists of a nozzle, an electrode, and a swirl ring. The electrode is located inside the nozzle and is connected to the negative terminal of a power supply. The swirl ring is located between the nozzle and the electrode and helps to control the flow of gas.

 

  • When the CNC plasma cutting machine is turned on, the power supply sends a high voltage electrical arc through the electrode, creating a plasma state within the nozzle. This plasma state heats the gas that is flowing through the swirl ring, creating a jet of plasma that is directed towards the metal that needs to be cut.

 

  • As the plasma jet comes into contact with the metal, it melts the metal and blows it away from the cut path. The CNC system controls the movement of the plasma torch, ensuring that the cut is made precisely and accurately.

 

  • One of the main advantages of CNC plasma cutting machines is their ability to cut through a wide range of materials, including mild steel, stainless steel, aluminum, and copper, among others. Additionally, these machines can cut through thick metal with ease, making them ideal for industrial applications.

  • In conclusion, CNC plasma cutting machines work by creating a plasma state within a nozzle and directing a jet of plasma towards the metal that needs to be cut. The CNC system controls the movement of the plasma torch to ensure precise and accurate cuts. With their ability to cut through a wide range of materials and thick metal, CNC plasma cutting machines are a valuable tool in the metal cutting industry.