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CNC plasma cutting technology is a high-tech integrating CNC technology, computer software, hardware technology, plasma cutting technology and precision machinery technology. The development of CNC plasma cutting machine can completely change the equipment level of the domestic thermal cutting industry, and reverse the current low efficiency, poor quality, high labor intensity, low material utilization rate, and dirty environment of the hot cutting industry. difference. At the same time, the development of CNC plasma cutting technology can drive relevant fields and disciplines to reach the international advanced level.
Flame cutting, plasma cutting and laser cutting are the three main methods of thermal cutting.
Flame cutting has large cutting deformation, can not meet the needs of high-precision cutting, and the cutting speed is low. It needs to be preheated before cutting, which takes time and is difficult to adapt to the needs of unmanned operation. Plasma cutting has a wide cutting range and can cut all metal sheets and many non-metallic materials. The cutting speed is up to 10m/min, which is 10 times that of flame cutting. Underwater cutting can eliminate the noise generated during cutting, dust, harmful gases and arc light, which is conducive to environmental protection and meets the environmental protection requirements of the 21st century. At present, with the maturity of high-power plasma cutting technology, the cutting thickness has reached 130mm, and the 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 long plate drilling time is long), the cutting precision of fine plasma cutting machine can reach the lower limit of laser cutting, the cutting surface quality is similar, but the cutting cost is much lower than the laser. Cutting, about 1/3, the maximum cutting thickness can reach 12mm, so the use of a fine plasma cutting machine to replace the expensive laser cutting machine, is conducive to the high-cost fine cutting of the medium and thin plates with larger dosage in the most economical way. . In addition, CNC plasma cutting and automatic nesting programming software can improve the material utilization rate by 5% to 10%, and cut 20 million tons per year, which can save 1 to 2 million tons of steel and worth several billion yuan. Therefore, in the industrialized countries, the development trend of replacing the flame cutting machine and the laser cutting machine with a numerical control plasma cutting machine has appeared. Therefore, research and promotion of CNC plasma cutting technology is of great significance.
Second, the development of China's CNC plasma cutting technology
China's CNC flame cutting technology started in the mid-1980s, while the CNC plasma cutting machine is even later. Most of the CNC plasma cutting machines are based on economical machine tools (microcontrollers as the core and stepper motors as the driving components). At present, there were more than 50 manufacturers engaged in the manufacture of CNC cutting machines in China, and the power was scattered. Many of the manufacturers' predecessors were welding and cutting tools factories with poor technical foundation. Throughout the 1980s, domestic companies were unable to compete with foreign companies in terms of product structure and production scale.
After entering the 1990s, some domestic companies aim at the world's advanced level, and constantly develop new products for CNC cutting machines, and the main technical indicators of some products have reached the advanced level of similar foreign equipment, and with the regulation of the market economy, currently Domestic manufacturers of CNC cutting machines have been adjusted to more than 20 companies. But the comprehensive strength and competitive strength are only Messer Cutting & Welding Co., Ltd., Shanghai Isahan Co., Ltd., Harbin Huasheng Welding and Cutting Equipment Co., Ltd., Harbin Sihai CNC Machinery Manufacturing Co., Ltd., Shenzhen Bo Lichang CNC Cutting Equipment Co., Ltd., Wuxi Hualian Welding and Cutting Equipment Factory, Beijing Baihui Hongda Technology Co., Ltd. and so on. They generally have independent research and development capabilities, large scale production, complete product specifications, variety, quality and stability, and high credibility. Therefore, in the bidding activities often win, the single output is generally more than three or forty units, and some even exceed one hundred. Of course, some enterprises have their own characteristics, but they can adapt to the needs of different enterprises.
Some CNC plasma cutting products in China have formed their own unique characteristics in many aspects, achieving "automation, multi-function and high reliability".
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