Due to the high speed and high efficiency of plasma cutting, high kerf finish, and wide applicable cutting range, CNC plasma cutting has been widely used in machinery, shipbuilding, steel structures, automobiles, pressure vessels and other industries, and is gradually replacing flame cutting in dominance in certain fields. As a high-precision mechanical instrument, the plasma cutting machine and the requirements of the precision of the cutting products, there are many precautions in the operation of the plasma cutting machine, which need the attention of the operator.
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 incision of the workpiece, and uses the momentum of high-speed plasma to remove the molten metal to form an incision.
Plasma cutting is only effective on metals that can act as conductors - mild steel, aluminum and stainless steel are typical examples. When cutting mild steel, operators will experience higher speeds and deeper cuts.
Flame gas cutting cuts by burning high temperature, or cutting metal by oxidation. Therefore, its application is limited to ferrous metals such as steel, which can be treated with oxidation technology. Metals like aluminum and stainless steel will form oxides that restrict further oxidation. This makes it impossible for conventional flame gas cutting to handle this type of material. Plasma cutting, which does not rely on oxidation treatment, can effectively cut aluminum, steel, and some other conductive metals.
And different kinds of gases can be used in the cutting of plasma cutting machines. At present, most people use compressed air for plasma cutting. Plasma cutting does not require gases such as flammable gases and compressed oxygen as operating gases.
Plasma cutting is faster than flame gas cutting when cutting thick plates, and flame gas cutting does not need to connect power and compressed air, which is easier for some users to use. Flame gas cutting is faster than plasma cutting when cutting thicker parts of steel, but plasma cutting machine is much faster than flame cutting when cutting medium and thin plates, and it is more efficient and effective.
Plasma cutting is ideal for cutting steel and non-ferrous metals less than 1 inch thick. Flame gas cutting requires the operator to carefully control the speed of the cut to maintain the oxidative treatment. Plasma cutting is a little more flexible in this regard. Plasma cutting is excellent for some applications, such as cutting metal sheet, which is not possible when using flame gas cutting. In addition, compared with mechanical cutting methods, plasma cutting machines are much faster and easier to perform non-linear cutting. Cutting aluminum, copper, stainless steel and other metal materials is the strength of the plasma cutting machine.
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