Development Status of Foreign CNC Plasma Cutting Technology
The manufacturers of foreign CNC cutting machines are mainly concentrated in Germany, the United States and Japan. Its main manufacturers are Germany's E SAB, MESSER, Japan's TANAKA, Koike, USA's L-TEC, and LINDA. The manufacturers that can represent the highest level of CNC plasma cutting technology are concentrated in Germany. The CNC cutting machine in Issa, Germany is the world's most complete, most versatile and highest-level CNC cutting machine that includes almost all non-contact cutting methods. NEC520 continuous track controller and RPC600 (single or double parallel) water jet plasma system can be used to cut the metal sheet below 130mm; with HD3070 fine plasma can be implemented on high speed (7.6m/min) and 1 ~ 12mm metal materials High-precision (close to laser cutting lower limit) cutting.
The above configuration represents the highest configuration of the CNC plasma cutting machine. Its main features are as follows:
(1) The whole process of automatic cutting, that is, plasma cutting (such as initial positioning, arc starting, perforation, cutting, heightening, lifting, etc.) is completed under the CNC command, and its parameters can be modified through programming.
(2) Multi-function means to increase the flexibility of CNC machine tools by adding different attachments to provide positioning, welding and storage foundations for the next process. For example, the marking function provides installation and positioning references. Plasma cutting can be used for groove processing such as X, V, Y and K, and it can not only complete the straight groove, but also complete the curve and arc-shaped groove, providing convenience for welding.
(3) Underwater cutting can effectively reduce the thermal deformation of the steel plate and fully suppress dust, arc, noise and spatter.
Hypertherm's plasma system represents the highest level of plasma systems in the world today. Its product specifications range from plasma, water jet plasma, and fine plasma to all plasma systems for thermal cutting. Ordinary plasma power output current is 20 ~ 200A, cutting thickness up to 50mm; water jet plasma power output current up to 1000A, cutting thickness up to 130mm; fine plasma power output current up to 100A, cutting thickness up to Below 12mm, the fine plasma slit width is 0.65～0.75mm, and it can cooperate with CNC cutting machine to achieve cutting accuracy of ±0.2mm.
Fourth, the gap between domestic and foreign countries in the CNC plasma cutting technology 90% of the cutting industry in foreign developed countries for CNC cutting machine cutting, only 10% for the manual cutting, and China's CNC cutting machine cutting only the total amount of material Below 10%, the proportion of CNC plasma cutting is even smaller. The vast majority still use manual or semi-automatic cutting, heavy and lagging behind, labor intensity, low production efficiency, and material waste, so it is very necessary to develop and popularize CNC plasma cutting machines to change this backward situation.
With regard to the gap between domestic CNC cutting machines and foreign products, there is no big gap in terms of CNC flame cutting machines, and the performance is relatively stable. Only the domestic cutters are used to ensure quality, and some major components such as electromagnetic valves and pressure reducing valves All AC servo systems use imported parts. The quality of domestically produced parts is still unstable. The overall performance of CNC plasma cutting machines is almost the same as that of imported equipment, but the plasma power supply matching CNC plasma cutting machines is far from the foreign countries. At present, many users are willing to use imported plasma power supplies to illustrate the problem. Therefore, CNC plasma cutting is developed. Related technologies are also very important.
In short, there is still a certain gap between domestic and imported products, such as the quality of cuts and the durability of wearing parts. Therefore, to completely replace imports, great efforts must be made in the production of basic parts.
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