According to the plasma cutting plasma formation media, cutting torch internal cooling method and cutting quality, the plasma cutting method is divided into three types: air plasma cutting, traditional plasma cutting, high-precision plasma cutting. Let's take a closer look at these three cutting methods:
I. Air Plasma Cutting Air Plasma cutting methods use the most common air. It is generally used to cut carbon steel with lower quality requirements. Air plasma cutting is only air/air combination and can be used to cut all conductive metals. The rated current of most systems is 100-120 A. The optimum cutting thickness for air plasma automatic cutting systems is usually 15 mm. With the development of technology, the service life of consumables for air plasma cutting process is significantly prolonged. The air plasma cutting system is only air-cooled.
Second, the traditional plasma cutting Traditional plasma cutting generally use the same gas (usually air, nitrogen or argon-hydrogen mixture) to cool and generate plasma arc. Carbon steel is generally cut with air, non-ferrous metals are cut with other gases, and a variety of gas combinations can be used for the cutting process.
Traditional plasma cutting carbon steel up to 15 mm, and cutting stainless steel up to 160 mm, cutting quality is very high, mainly for hand-cut and ordinary plasma cutting applications. Most of the water-cooling methods use the new technology to significantly prolong the life of wearing parts.
Third, high-precision plasma cutting High-precision plasma cutting (that is, we usually say fine plasma cutting) plasma arc current density is high, it is several times that of ordinary plasma arc current density, high arc stability. Current high-precision plasma cutting surface quality has reached the lower limit of laser cutting, and its cost is only 1/3 of laser cutting. Excellent cutting quality can be obtained when cutting sheets thinner than 16 mm. The improvement in quality comes from using the latest technology to compress the arc very efficiently, which greatly increases the energy density. The reason why it is required to run at a lower speed is to allow the motion equipment to travel more precisely along the specified contour. This process is only used for machine cutting applications.
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