CNC flame cutting machine has a large cutting deformation, can not meet the needs of high-precision cutting, and the cutting speed is low, need to be preheated before cutting, take time, it is difficult to adapt to the needs of unmanned operation. Plasma cutting has a wide range of cutting, can cut all metal plates and many non-metallic materials, the maximum cutting speed of up to 10m/min, is 10 times the flame cutting. Cutting underwater can eliminate the noise, dust, harmful gas and arc generated during cutting, which is conducive to the protection of the environment and meet the environmental protection requirements of the 21st century. With the maturity of high-power plasma cutting technology, the cutting thickness has reached 130mm. High-power plasma cutting with water jet technology has made the cutting quality close to the lower limit of laser cutting (±0.2mm). Because the laser cutting machine is expensive, and currently only suitable for thin plate cutting (usually thick plate punching time is long), and fine plasma cutting machine cutting precision can reach the lower limit of laser cutting, the cutting surface quality is similar, but the cutting cost is much lower than the laser The cutting is about 1/3 of the way, and the maximum cutting thickness can reach 12mm. Therefore, replacing the expensive laser cutting machine with a fine plasma cutting machine is beneficial to the high-speed fine cutting of medium and thin plates with a large amount in the most economical way. . In addition, CNC plasma cutting and automatic nesting programming software can improve the material utilization rate of 5% to 10%, and annual cutting of 20 million tons, then the steel can save 100 to 200 million tons, worth billions of dollars. Therefore, the development trend of replacing the flame cutting machine and the laser cutting machine with a numerical control plasma cutting machine has appeared in industrialized countries. Therefore, research and promotion of numerical control plasma cutting technology is of great significance.
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