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An important standard for choosing laser welding machine

Author: zixu   Time: 2020/02/19

The principle of optical fiber transmission, the primary technical parameters of laser welding machine, and the principle of selection skills: laser welding is to use high-energy laser pulse to heat the small area of the data, and the energy radiated by the laser is diffused through the heat transfer to guide the internal diffusion of the data, and then the data is melted to form a specific molten pool. It is a new type of welding method, mainly for the welding of thin-walled materials and precision parts, which can complete spot welding, butt welding, stack welding, seal welding, etc., with high depth ratio, small weld width, small heat affected area, small deformation, fast welding speed, flat and beautiful weld, no post welding treatment or simple treatment, high weld quality, no porosity, accurate control, focusing light spot Small, high positioning accuracy, easy to complete the initiative.
The technical parameters of optical fiber transmission product picture equipment are not very clear about the laser equipment, and there is no purchase experience. It is not easy to choose a good quality product suitable for the welding machine itself. Parameters can become an important standard for purchasing models. Because even for the same type of welding machine, when we weld different materials, we need to adjust different technical parameters. So, what are the primary technical parameters? The equipment arranges the following four points for our reference.
laser welding machine
1-power density
Power density is one of the most important parameters in laser processing. With a higher power density, the surface layer can be heated to boiling point in microsecond time scale to generate a large amount of vaporization. As a result, high power density is advantageous for data removal, such as drilling, cutting and carving. As for the lower power density, it takes several milliseconds for the surface temperature to reach the boiling point. Before the surface vaporization, the bottom layer reaches the melting point, which is easy to form a good fusion welding. Therefore, in the conductive laser welding, the power density scale is 104 ~ 106W / cm2.
2-laser pulse waveform
Laser pulse waveform is an important problem in laser welding, especially for thin plate welding. When a high-intensity laser beam hits the data surface, 60-98% of the laser energy on the metal surface will be reflected and lost, and the reflectivity will change with the surface temperature. During the effect of a laser pulse, the reflectivity of the metal changes greatly.
3-laser pulse width
Pulse width is one of the important parameters of pulse laser welding. It is not only an important parameter different from data removal and data fusion, but also a key parameter to determine the cost and volume of processing equipment.
 
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