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what is plasma cutting and gas cutting

Nov 29, 2018

The plasma cutting machine is a new type of thermal cutting device. Its working principle is that compressed air is used as the working gas, and the high temperature and high speed plasma arc is used as the heat source to partially melt the cut metal and simultaneously melt the high speed airflow. The metal blows away and forms a narrow slit. The plasma cutting machine can be used for cutting various metal materials such as stainless steel, aluminum, copper, cast iron, carbon steel, etc. It not only has high cutting speed, narrow slit, flat cut, small heat affected zone, low deformation of the workpiece, simple operation, and remarkable Energy saving effect.

The plasma cutting machine is suitable for the manufacture, installation and maintenance of various mechanical and metal structures, and is used for cutting and cutting of medium and thin plates, opening, excavating, opening and cutting. Plasma cutting is a processing method that uses the heat of a high temperature plasma arc to locally melt (and evaporate) the metal at the workpiece cut and to remove the molten metal by high-speed plasma momentum to form a slit. Plasma cutting machines are widely used in automobiles, locomotives, pressure vessels, chemical machinery, nuclear industry, general machinery, engineering machinery, steel structures and other industries!

Gas cutting is to use the combustion gas and the combustible gas to heat the metal at the required cutting point to the combustion temperature through the torch (for steel, the temperature is generally 1100-1150 ° C, and then the pure oxygen jet is sprayed to burn the metal at the slit. The metal cutting method is used to separate the metal workpiece by using a high pressure of a pure oxygen jet to blow off the molten slag of the metal combustion to form a narrow slit.

Gas cutting is to make the heated metal into iron oxide slag and blown away. The flame at the time of gas cutting has different compositions at different stages. In the preheating stage at the beginning of gas cutting, it is also produced by the mixed combustion of oxygen and combustible gas. Its main purpose is to heat the workpiece. When the temperature of the workpiece rises to the ignition point of the material, the torch emits a stream of pure oxygen, the purpose of which is to help the metal to burn smoothly and to blow off the iron slag generated by the combustion.