Posted on March 30, 2021
Compared with other thermal cutting methods, laser cutting is characterized by fast cutting speed and high cutting quality. When oxygen is used as a processing gas, the cutting edge is slightly oxidized. For plates with a thickness of up to 4mm, nitrogen can be used as the gas for high-pressure cutting.
The laser beam focuses on a small point of light, which makes the focal point reach a high power density. combustion material is transferred into slag to control the combustion rate of oxygen and metal, and the speed of oxygen diffusion through the slag to the ignition front has a great impact on the combustion speed. The higher the oxygen flow rate, the faster the combustion chemical reaction and the removal of slag. The principle of laser oxygen cutting is similar to that of oxyacetylene cutting.
Brazing and soldering are metal joining processes that use a filler metal to join dissimilar materials. Typically these processes will use a laser to melt the filler metal in a controlled and remote process. Laser brazing and soldering are often used on finished components in the automotive and consumer electronics industries.
The laser beam is focused to form a very small operating point with strong energy, and it is applied to cutting with many characteristics. The material does not need to be clamped and fixed during laser cutting, which saves the fixture and saves the auxiliary time of loading and unloading. ② The cutting surface is smooth and beautiful, the surface roughness is only a few tens of micrometers, and even laser cutting can be used as the last process. The cutting speed of the controlled fracturing cutting is fast and does not require too much power, otherwise, it will cause the surface of the workpiece to melt and break the edge of the cutting. obviously, there are two heat sources in the process of oxidation melting, namely, laser irradiation and the heat energy produced by the chemical reaction of oxygen and metals.
Under this heat, the material is formed by a small hole filled with steam, surrounded by molten metal walls. Due to oxidation produced a large amount of heat in the process of cutting, so the energy needed of laser oxygen cutting is just 1/2 of molt cutting, and cutting speed is more than laser vaporization cutting and melting cutting. For example, when cutting stainless steel materials, when the requirement for the quality or surface quality of the products is not high , air can be used as the cutting gas, which can reduce the cost. The laser power has a great influence on cutting thickness, cutting speed, cutting width and cutting quality. In the process of laser cutting, the laser focus position has a great influence on the surface quality of the parts after cutting, and different materials have different requirements on the focus position. It is now common for these systems to perform multiple laser operations, including cutting, welding, drilling and marking, using one machine on a single part or family of parts.
In addition, filler welding can also roughly adjust the chemical identity or perform multi-layer welding of thick plates. Fiber laser welding machines have proven to be a highly successful investment for a number of manufacturers, reducing post finishing processes and cycle times while creating productivity and return on investment . Thus, heat conduction welding is used mostly to join parts with thin walls. The laser produces a smooth, rounded seam that does not require any extra grinding or finishing. In this laser welding process, the energy coupled into the workpiece solely through heat conduction. The heat conductivity of the material limits the maximum weld depth.
We serve a variety of manufacturing industries with direct part marking solutions. A new area of application in recent years is the oil screen seam pipe. Copper and brass are cut only when there is a “reflective absorption” device installed on the system, otherwise, the reflection will destroy the optical components. On the other hand, the molten oxide and the melt are blown out of the reaction area, forming an incision in the metal. Air can be supplied directly from the air compressor, so it is very cheap compared to other gases.
Most laser cutting machines are controlled by CNC programs or made into cutting robots. Due to the laser transmission characteristics, the laser cutting machine is usually equipped with multiple CNC workstations, and the whole cutting process can be achieved in all CNC. In operation, the cutting of different shape parts can be applied only by changing the NC program, which can be cut in 2D as well as 3D. First of all, the other methods of thermal cutting cannot cut on a very small area like the laser beam, as a result, it has a wider incision and large heat affected zone and obvious deformation.
A trace oxide film appears on the cut surface, but it can be used as a measure to prevent the coating layer from falling off. There is a high requirement for the purity of nitrogen (especially stainless steel of 8mm or more, which generally requires 99.999% purity), and the pressure requirement is relatively large, generally about 1.5Mpa. The surface roughness of the workpiece increases when it deviates from the optimal power range. In order to overcome this phenomenon, placed the high sensitivity of the capacitive sensor on the cutting head, to realize the real-time feedback of the distance information between the nozzle and panel to the CNC system. This video displays the welding process of 1.6 mm Aluminum welding with MORN LASER 1500W Laser Welding Machine. This video displays the welding process of 2.0mm Aluminum welding with MORN LASER 1500W Laser Welding Machine.
Copper with a thickness of less than 2mm can be cut and processed, the gas must be oxygen. The coating oil film on the surface of the plate will get better perforation effect without reducing the processing quality. The cutting material does not need to consider its hardness, that is, the laser cutting ability is not affected by the hardness of the cutting material, and any material with hardness can be cut. ① The laser cutting incision is narrow, the slits are parallel and perpendicular to the surface, and the dimensional accuracy of the cutting parts can reach ±0.05mm.
Install it on the die-cutting machine to cut off a variety of printed graphics boxes. Stainless steel used for decoration, advertisement, service industry or patterns, marking and font of non-metallic materials . Such as the pattern of an art photograph album, Chinese and English fonts of the company, government department, the hotel, the shop sign, the station, the pier, the public place. Cutting torch during laser cutting has no contact with the workpiece and no tool wear. The machining of parts with different shapes does not require replacement of the “cutter”. The laser cutting process has low noise, small vibration and no pollution.