As early as the 1970s, lasers were used for cutting. In modern industrial production, laser cutting is more widely used in sheet metal, plastics, glass, ceramics, semiconductors, textiles, wood and paper and other materials processing. In the next few years, the application of laser cutting in the field of precision machining and micro-machining will also achieve substantial growth.
1. Laser cutting
When the focused laser beam hits the workpiece, the irradiated area will rise sharply to melt or vaporize the material. Once the laser beam penetrates the workpiece, the cutting process begins: the laser beam moves along the contour line while melting the material. Usually a jet of air is used to blow the melt away from the incision, leaving a narrow gap between the cut part and the plate frame, which is almost as wide as the focused laser beam.
2. Flame cutting
Flame cutting is a standard process used when cutting mild steel, using oxygen as the cutting gas. Oxygen is pressurized up to 6 bar and then blown into the incision. There, the heated metal reacts with oxygen: it starts to burn and oxidize. The chemical reaction releases a large amount of energy (up to five times the laser energy) to assist the laser beam in cutting.
3. Melt cutting
Melt cutting is another standard cutting process used when cutting metal. It can also be used to cut other fusible materials, such as ceramics.
Nitrogen or argon is used as cutting gas, and gas with a pressure of 2-20 bar is blown through the incision. Argon and nitrogen are inert gases, which means that they do not react with the molten metal in the incision, but only blow them to the bottom. At the same time, inert gas can protect the cutting edge from air oxidation.
4. Compressed air cutting
Compressed air can also be used to cut thin plates. Air pressure to 5-6 bar is enough to blow away the molten metal in the incision. Since nearly 80% of the air is nitrogen, compressed air cutting is basically a fusion cutting.
5. Plasma assisted cutting
If the parameters are selected properly, plasma clouds will appear in the plasma-assisted melting and cutting incision. The plasma cloud is composed of ionized metal vapor and ionized cutting gas. The plasma cloud absorbs the energy of the CO2 laser and transforms it into the workpiece, so that more energy is coupled to the workpiece, and the material will melt faster, resulting in faster cutting. Therefore, this cutting process is also called high-speed plasma cutting.
The plasma cloud is actually transparent to the solid laser, so the plasma-assisted melting and cutting can only use CO2 laser.
I learned about the basic knowledge about laser cutting today. If you want to know more, please continue to pay attention to us. Ander Laser Intelligent Equipment (Guangdong) Co., Ltd. is a laser equipment manufacturer integrating R&D, production and sales. main products : laser cutting machines.Laser marking machine, laser welding machine and laser equipment peripheral automation and other series, involving more than 100 kinds of industrial laser equipment and its supporting products; strictly in accordance with the requirements of the ISO9001 quality control system, comprehensive control of product quality, multiple series of products have been Obtained the EU CE certification, looking forward to your cooperation and understanding.
Part of the content of this article has been compiled from the network and shared. If there is any infringement, please contact the editor to delete it.