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First of all, what is laser welding? Simply put, laser technology uses a polarizer to reflect the laser, and the resulting beam concentrates it in the focusing device to generate enormous energy. If the focus is close to the workpiece, the workpiece will melt and evaporate within a few milliseconds, and this effect is used in the welding process, which is laser welding.
The most important advantage of laser welding is the ability to focus very high energy on a point where the laser beam hits the edges of the two areas to be welded and the input energy heats the metal and melts it. After the laser beam is applied, the melted material will cool rapidly. A small portion of this process will enter the part being welded. While the welding reduces thermal deformation, the input thermal energy is also reduced, so that the machining accuracy is doubled. Moreover, the laser beam does not cause any wear and can work stably for a long time.
Laser welding applied to automobiles can reduce the weight of the vehicle body, improve the assembly accuracy of the vehicle body, and increase the rigidity of the vehicle body. In the current automotive industry, laser technology is mainly used for body welding and parts welding. Laser welding is mainly used for the welding of body frame structures, such as the welding of the top cover and the side body. With laser welding technology, the width of the joint between the workpiece joints can be reduced, which not only reduces the amount of sheet used but also increases the rigidity of the body, greatly improving safety. Laser welding parts, parts of the welding parts are almost no deformation, welding speed, and do not require post-weld heat treatment, commonly used in transmission gears, valve lifters, door hinges and so on.
Since laser welding has very strict requirements on process and energy consumption, there are only a few high-quality models in China that use this process. When it comes to the automotive industry using laser welding technology, the first thing people think of is the Germans. BMW first adopted this process into the whole vehicle manufacturing. At present, the most widely known manufacturers of laser welding technology in China are also from the German public, such as the sagitar, Bora, Shanghai Volkswagen's Polo, Touran and so on. In contrast, what is still not well known is that Haima Motors, which just took its own path last year, also cited laser welding technology to the H1 platform. The recently launched Haima 3 has applied this international top-notch automobile manufacturing. technology. This is also a breakthrough for autonomous auto companies in this cutting-edge field.
It can be seen in the craft manual of Haima 3 that the hippocampus 3 uses the laser welding equipment of the famous German EDAG company, and also adopts the robotic flexible laser online detection system produced by LMI of Canada. In addition, Haima 3 also applies the current internationally advanced manufacturing processes, such as the German SUNDWIG automatic unwinding leveling cleaning shear line, the French ARO feeding electric welding torch, the Swedish ABB resistance spot welding robot. The group application has achieved unmanned automatic assembly and welding. Haima 3 is the first self-owned brand product in China that meets international standards, which symbolizes an important step forward in the technology of its own brand.
Some experts predict that the use of laser welding technology to gradually replace other welding technology is the general trend, can greatly improve the quality of the vehicle, and ultimately benefit consumers. However, if independent brands want to go to the high end, they also need to get rid of the inherent impression of “low quality and low priceâ€, and it is necessary to actively introduce advanced technologies such as laser welding. At this point, Haima Motor has made a good example.
When we pay attention to the vehicles coming and going on the road, we will find that there are two indecent rubber bands on the top cover of some cars, and the top cover of some cars is like a flat steel plate, which is beautiful and smooth. It is particularly beautiful. However, in addition to aesthetics, such models may maximize the safety of passengers at critical times. The reason for this is laser welding. >> Into the colorful world of laser welding Â