Many metal plates will be processed by hot processing. Most of them need to make a small hole on the plate at the initial stage of processing, and then cut outward. A few can be cut directly from the edge. In the early days, a hole opening device with a separate punch was used, but after the laser cutting machine appeared, the punch was not needed. Pulse hole opening is a common hole opening method.
Use high peak power pulsed lasers to melt or evaporate small amounts of material. Use air or nitrogen as the auxiliary gas to reduce the pore expansion caused by exothermic oxidation. When cutting, nitrogen pressure is higher than oxygen pressure. Each pulsed laser produces only small particle jets, which gradually penetrate, so it takes a few seconds for thick plates to pierce. After the completion of perforation, immediately replace the auxiliary gas metal laser cutting machine body with oxygen for cutting. In this way, the perforation diameter is smaller, and the perforation quality is better than that of blasting perforation.
After the material is irradiated by the continuous laser of the laser cutting machine, the high-energy beam will form a pit on the material surface, and the molten material will be removed through the coaxial air flow, gradually forming a hole. The diameter of the small hole is usually half of the thickness of the plate. When the thick plate is perforated, the hole will appear large and not round. In addition, the air pressure during perforation is consistent with the cutting air pressure, which will result in splashing of residues during cutting and affect the overall material aesthetics.
In the process of the gradual development of industry, the importance of laser cutting machine in the industry is gradually reflected. As a relatively advanced processing technology, laser cutting technology plays a positive role in promoting the development of the entire industrial metal laser cutting machine industry, both in terms of its development prospects and the importance of its application. The application of laser cutting technology not only improves the working efficiency of processing, but also makes the process more refined.
The purpose of laser cutting machine is mainly divided into three categories, cutting, carving and punching. It is mainly used in cutting. Carbon dioxide cutting machine is mainly used for cutting cloth, acrylic cutting, plastic rubber and other materials. Optical fiber laser cutting equipment is used for cutting metal materials, such as stainless steel plate cutting, copper plate cutting, carbon steel cutting, etc. The accuracy of laser cutting is high. It can be automatically typeset according to graphics and patterns, greatly improving the utilization rate of materials. The edges are smooth and flat, and the automatic edge sealing does not scatter. The machine has diversified performance, which can not only achieve the cutting effect of materials, but also mark and carve on the surface of objects. It has a wide range of functions.
The advantages of laser cutting machine compared with traditional manual cutting are clear at a glance. The cutting efficiency is much higher. The advantages of mechanization compared with traditional manual cutting are innumerable. Moreover, laser cutting is non-contact cutting, which has little impact on the product itself. It belongs to thermal cutting. The product edge is smooth and flat without burrs, with good cutting effect, accurate laser alignment, and high cutting accuracy. Under the application of laser cutting technology, it is not only unnecessary to apply abrasive tools, but also can ensure the cutting quality. Improve production efficiency in the process of reducing production costs. Therefore, laser cutting technology is widely used in vehicle manufacturing, aviation and light industry. In recent years, in the process of processing industry development, laser cutting technology has achieved rapid development in application.