Laser welding is usually done without filler metals so parts need to have good fit with a gap that’s less than 15% of the thickness of the thinnest component, which limits its scope of use. The use of wire-filled laser welding can greatly reduce the limitations for welding gap. For example, for an aluminum alloy plate with a thickness of 2mm, if no welding wire is used, the sheet gap must be zero to obtain a good weld shape. If a φ1.6mm welding wire is used as a supplementary metal, even if the gap is increased to 1.0mm, the weld can be ensured.
For example, the cutting speed is usually lower when the small circle and sharp angle are cut. At this time, the NC system can reduce the cutting power according to the actual cutting speed, and can get excellent cutting precision and sectional quality. ⑸ The wavelength of the optical fiber laser is 1.06μm, is more easily absorbed by the metal material compared with the wavelength of CO2 which is 10.6 μm and is especially beneficial for sheet metal cutting. At the same time with the aid of high-speed airflow which coaxial with the laser beam to blow away molten material, so as to realize the cutting of the workpiece.
Through his articles, users can always easily get related problems solved and find what they want. Based on the years of cutting experience, the following nine criteria are summarized, which can be used as a reference for customers. Laser cutting equipment costs high, which means a high one-time investment. Both materials have high reflectivity and very good thermal conductivity. Only when the system is equipped with “reflective absorption” device can the aluminum be cut, otherwise the optical component will be destroyed by reflection. The use of nitrogen to get the edge of non-oxidized and no burr which does not need to be dealt with again.
In pulsed mode, the gain medium is pumped in bursts to generate short laser pulses. Power, duration and frequency of the laser pulses are important parameters for material processing. Depending on the intensity of the laser radiation, laser welding is categorized as heat conduction welding or deep welding.
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.
After the device is adopted, the cutting data can be received from the computer-aided design workstation. The maximum thickness of cutting can be increased to 16mm, but the size error of the cutting part is larger. ⑵ Optical fiber laser has a small volume, light weight, movable and flexible working position. In addition, the fiber laser generator has no vulnerable parts, and there is no late maintenance cost.
Just missed a little section about piercing but still this is the best there is!! In the field of automobile manufacturing, the cutting technology of space curves such as car roof windows has been widely used. Secondly, lasers can cut nonmetals, while other hot cutting methods cannot. It is convenient to combine with automation equipment, and it is easy to automate the cutting process. The auxiliary gas entering the nozzle can also cool the focus lens, prevent the dust from entering the lens seat to contaminate the lens and cause the lens to overheat.
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.