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The following describes the technical progress of plasma CNC cutting machine for reference.
Since the United States successfully developed plasma cutting technology in the mid-1950s, the world has developed rapidly. With the advent of computer and digital control technology, plasma cutting technology has gradually developed from manual or semi-automatic to numerical control. CNC plasma cutting technology in China started in the 1990s. Some colleges, scientific research institutes, and manufacturers studied CNC plasma cutting technology and gradually developed and produced various specifications of CNC plasma cutting equipment. In 2000, China Labor’s Laser acquired wholly-owned Farley LaserLab and changed its name to HG-Farley LaserLab. The company concentrates on the best talents and best quality assets in the field of laser and plasma cutting system manufacturing and owns two international famous brands, Farley and LaserLab. Products include: high-power CNC laser cutting systems, fine plasma cutting systems, high-pressure water cutting systems, oxygen cutting systems, etc., representing the highest level of the current global cutting system. Wuhan Falilai Cutting System Engineering Co., Ltd. is a branch company of HG-Farley LaserLab, a world-renowned manufacturer of CNC cutting machines in China.
I. Introduction of Ion Cutter Technology The working principle of plasma cutting technology is to use a high-temperature and high-speed plasma arc as a heat source to locally melt the cut metal and simultaneously blow away the melted metal with a high airflow to form a narrow slit. CNC plasma cutting technology is based on plasma cutting technology, inverter power supply technology, numerical control technology based on the common progress of computer control, plasma arc characteristics research, power electronics and other disciplines.
1. Plasma cutting technology a. Ordinary plasma arc cutting. According to the main working gas used, it can be divided into argon plasma arc cutting, oxygen plasma arc cutting and air plasma arc cutting. The cutting current is generally less than 100A and the cutting thickness is less than 30mm.
b. Restrict the plasma arc cutting. According to the reconstraint mode of plasma arc, it is mainly divided into water recompression plasma arc cutting and magnetic field reconstraint plasma arc cutting. As the plasma arc is compressed again, its current density and cutting arc energy are further concentrated, thereby improving the cutting speed and processing quality.
c. Fine plasma arc cutting. Plasma arc current density is very high, usually several times that of ordinary plasma arc current density. Due to the introduction of technologies such as rotating magnetic fields, the stability of its arc is also improved, so its cutting accuracy is quite high. The surface quality of domestically produced Rapier fine plasma cutting has reached the lower limit of laser cutting, and the cost is far lower than laser cutting.
2. Plasma cutting power supply technology China's more high-leakage transformer plus secondary side rectifier type cutting machine power supply has been gradually replaced by the inverter plasma cutting power supply. Improve the working efficiency of the transformer; volume and weight reduction; generally can save 10% -20%; can easily adjust the output voltage and current size; control cycle can reach subtle pole, the dynamic effect is rapid.
3. Numerical Control Technology The rapid development of computer technology has improved the high-precision, high-speed, and high-efficiency functions of CNC plasma cutting. The open architecture makes the CNC system more versatile, flexible, adaptable, and extensible, and it is also becoming more intelligent and network-oriented. Currently, there are two basic types of open systems:
a. CNC+IPC Motherboard: Insert an IPC mainboard into a traditional CNC machine. The IPC is mainly used for real-time control. The CNC is mainly used for real-time control based on axis motion.
b. CNC + IPC + motion control board: The motion control board is inserted into the standard slot of the IPC for real-time control, while the IPC is mainly used for non-real-time control.
Second, China's plasma cutting machine technology status status China's small and medium-sized enterprises and even in some large enterprises in the sheet metal cutting is generally manual cutting, copying machine cutting, semi-automatic cutting machine cutting. The hand-cut cutting material has poor quality of the kerf, large size error, large material waste, heavy workload of subsequent processing steps, and poor working conditions; the profiling machine blank must be pre-processed to adapt to the workpiece, not suitable for single use. Parts, small batches, and large workpiece blanking; semi-automatic cutting function is simple, only suitable for one kind of shape cutting. Moreover, cutting machines used in the metalworking industry are mainly flame and ordinary plasma cutting machines. With the vigorous development of the domestic economic situation and “accelerating the trend of using welding to accelerate the rapid development of China's “global manufacturing base†since China’s accession to the WTO, the advantages of CNC cutting are gradually being recognized by people.
1. Comparison of plasma cutting technology and laser cutting technology:
a. greatly improved the production efficiency b. expanded the range and thickness of the material being cut c. greatly reduced the investment in equipment, operation and maintenance costs d. laser cutting is suitable for large-scale cutting of the sheet below 16mm 2. Comparison of plasma cutting technology and flame cutting technology:
a. Cutting quality is better: 1. Basically realizes no slag cutting, obviously reduces secondary processing; 2. Small heat-affected zone; 3. When the cutting is less than 6mm, the cutting quality is obviously superior b. Wide range of cutting: Plasma can cut carbon steel, stainless steel and aluminum, flame can only cut carbon steel c. Greatly improve the production efficiency: 1. When the cutting machine is less than 32mm thick material, it has obvious speed advantage. For example, when cutting carbon steel from 6mm to 12mm, the cutting speed of 200A plasma is 5-8 times that of flame cutting; 2. No preheating time is required for plasma cutting; 3. The piercing time is shortened.
d. Reduced operating costs. For example, when cutting carbon steel from 6mm to 12mm, the operating cost of 200A plasma is only 1/2 to 1/10 of the flame cut. Plasma cutting has the combined advantages of cutting quality, cutting speed and operating cost. It is especially suitable for carbon steel, stainless steel and aluminum materials less than 40mm.
In summary, the current market demand is mostly CNC plasma cutting machines, which can meet the needs of different materials, different thicknesses of metal sheet blanking, and processing of metal parts, so the demand will increase. For example, the domestically produced Rapier plasma cutting machine is an ideal equipment for rapid processing of sheet metal. It can efficiently and flexibly process carbon steel, stainless steel, and aluminum materials of any shape and directly produce high-quality parts, even punches, shears, and even shears. Laser cutting machine is more flexible. This inherent flexibility means that old-fashioned straight cuts and small plate cuttings have been replaced. Rapiers such as angled cuts, notches, and perforations can be completed without any additional cost.
III. Market potential and development trend of China's CNC plasma cutting The annual market demand for CNC cutting machines in China is between 3000-5000 units. The main products are CNC plasma cutting machines. In comparison, profiling cutters sell tens of thousands of units each year, and semi-automatic cutting machines sell tens of thousands each year. 90% of the metal processing industry in developed countries is cutting by CNC cutting machines, and only 10% are hand-cut; while the output of CNC cutting machines in China only accounts for 10% of the total amount of materials to be cut, and the proportion of numerical control plasma cutting materials is smaller. . It can be seen that the potential of the CNC cutting market in China, especially the CNC plasma cutting market, is enormous.
From the mechanical structure point of view, its development has experienced three stages: cross type (light type), door type (small type), and gantry type (large type). The corresponding models have a wide range of types, but the breadth depth is not enough. Longmen type special profile cutting machine is only a few Several production. The company that can represent the highest level of CNC plasma cutting technology is Wuhan Falilai Cutting System Engineering Co., Ltd. The cutting accuracy of Rapier Fine Plasma Cutting Machine has reached the lower limit of laser cutting, and a special cutting robot and cutting tool are installed on the gantry cutting machine. The system can cut out various trajectories in space and use special tracking probes to control the cutting trajectory during the cutting process.
Due to the increasing requirements on cutting quality, labor environment, etc., large Trident can be equipped with a variety of plasma and oxygen cutting torches, and equipped with more torch boxes, to meet the needs of future processing expansion; this system is the largest The characteristic is that it can combine the high speed of plasma with the high load bearing capacity of oxygen cutting of thick plates. From the perspective of the development trend of the foreign CNC plasma cutting industry, it can be predicted that the market demand for CNC cutting machines in China will still be dominated by CNC plasma cutting machines. At the same time, the demand for advanced equipment such as large-scale underwater plasma cutting and fine plasma cutting, which are widely used abroad, is increasing year by year in the Chinese market.
4. In summary, HG-FARLFY LASERLAB has been committed to the technical development and technological progress of CNC plasma cutting machines, providing users with excellent cutting quality, cutting speed, enabling users to optimize the cutting process and supporting secondary processing. Greatly improve production efficiency and reduce operating costs. High-performance Rapier and Trident CNC plasma cutting systems are the latest embodiment of this concept.
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