On the one hand, the rapid development of domestic CNC cutting technology brings more choices of cutting methods to the end-user market, on the other hand, it also makes the enterprise production departments tired of headache for the upgrading of equipment. Is it necessary for production-oriented enterprises to keep chasing for each change of processing methods? The view of Wuhan jiabeide technology marketing department is that the production mode suitable for its own processing needs is the best.
　　
　　The traditional gas cutting processing method has existed in China for more than ten years. When the numerical control flame cutting machine equipment began to flow into the domestic market in large quantities, there was a view that the traditional processing method would be eliminated, but the actual situation is not the case. Here we want to mainly summarize and explain the advantages of the numerical control plasma cutting machine equipment compared with the laser processing method, It is also hoped that user enterprises can have a rational choice and judgment for the wide variety of processing equipment in the current market. Avoid blindly chasing elimination and falling into financial pressure.
　　
　　1、 The difference between numerical control plasma cutting machine and laser cutting

Numerical control plasma cutting machine is a processing method that uses high temperature to spray high-speed air flow from the nozzle to ionize and form a conductor. When the current passes, the conductive gas immediately forms a high-temperature plasma arc, uses the heat of the arc to locally melt or evaporate the metal at the workpiece notch, and then uses the momentum of high-speed plasma to remove the molten metal to form a notch.

Numerical control laser cutting machine is to use high-power density laser to concentrate into a high-density beam in the form of light, transmit the beam to the material surface, heat the material to thousands or even tens of thousands of degrees Celsius in a very short time, and use high temperature to melt or gasify the material to achieve the purpose of cutting materials. Compared with traditional cutting machines, these two cutting machines do not need mechanical knives and avoid contact with the work.

　　
　　CNC plasma cutting machine can cut all metal plates, with wide cutting field, fast cutting speed and high efficiency. It can cut underwater. When cutting underwater, it can eliminate the noise generated by cutting, and will not be polluted by dust, harmful gas and arc light, which is conducive to improving the working environment. The commonly used plasma arc working gases are hydrogen, nitrogen, oxygen, water vapor, argon and some other mixed gases.

CNC laser cutting machine has fast cutting speed, smooth and flat incision, and generally does not need follow-up processing. The cutting heat affected zone is very small, the plate deformation is small, and the cutting seam is narrow, between 0.1mm-0.3mm. It has high processing accuracy, will not damage the material surface, no shear burrs, good repeatability, and can cut the whole plate with a large format, but the price is relatively expensive.

Numerical control plasma cutting machine can be divided into ordinary plasma cutting machine, fine plasma cutting machine and laser like plasma cutting machine according to the cutting quality. The cutting quality of fine plasma cutting machine has been close to the level of laser cutting. At present, the cutting thickness of this cutting machine has exceeded 150mm. Nevertheless, compared with CNC laser cutting machine, CNC fine plasma cutting machine has higher cutting accuracy. The former can reach within 0.2mm, while the latter can only reach within 1mm. One belongs to fine processing and the other belongs to rough processing.

　　
　2、 What is better about CNC plasma cutting machine than laser cutting?

In cutting mode, fractional control cutting machine can be divided into CNC flame cutting machine, CNC plasma cutting machine and CNC laser cutting machine. These three kinds of cutting machines occupy a certain market according to different cutting requirements and market prices, but which is better in terms of technical economy?

CNC flame cutting machine has the ability to cut large thickness carbon steel, and the cutting cost is relatively low. However, due to the influence of air pressure, cutting nozzle height, preheating time and other factors, the cutting material has the problems of large cutting deformation, low cutting accuracy, low cutting speed, long cutting preheating time, long perforation time and so on. It is difficult to meet the needs of fully automated operation, so it is mainly used to cut carbon steel and large thickness plates.

CNC plasma cutting machine can cut all metal plates, so it has the advantage of wide cutting field. The cutting speed can reach 10m/min, which is 10 times faster and more efficient than flame cutting. Plasma cutting can also be cut underwater, which can eliminate the noise, dust, harmful gas and arc pollution generated during cutting, effectively improve the environment of the workplace and is conducive to environmental protection. With the continuous improvement of plasma cutting technology, the thickness of high-power plasma cutting can reach 130mm at present, and the cutting range has been significantly expanded.

Numerical control laser cutting machine has the advantages of fast cutting speed and high precision, but the price is very expensive, so it is mostly used in the occasions of thin plate cutting and high precision requirements. In order to reduce the cost and obtain the effect similar to the cutting surface quality of laser cutting machine, some enterprises have developed a CNC fine plasma cutting machine. The cutting accuracy of the cutting machine can reach the lower limit of laser cutting, and the maximum cutting thickness can reach 12mm. Generally, it is not used for reprocessing after cutting. It can be used for cutting medium and thin plates with large amount of consumption, and the thicker the plate, the more it can reflect the cutting advantage.

To sum up, CNC plasma cutting machine has high cost performance, especially for cutting 30mm thick ordinary carbon steel materials; As the plasma cutting machine adopts automatic nesting programming software, it can effectively improve the material utilization rate by 5%-10%. Calculated by cutting 20million tons per year, it can save 1-2million tons of steel per year. Therefore, NC plasma cutting is mostly used in industrial developed countries, which is also the inevitable trend of cutting machine development in the future in developing countries.

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