Laser welding technology - a new leap in automotive manufacturing technology
Kaiping Jenor Sanitary Ware Co., Ltd , https://www.kpjenorsanitary.com
Unlike the current conventional spot welding process, laser welding can achieve molecular bonding between two steel plates. Generally speaking, the hardness of the welded steel plate is equivalent to a whole steel plate, thereby increasing the strength of the vehicle body by 30%. The same is greatly improved.
Of course, the practical use of laser welding is not limited to this. Generally speaking, when the vehicle is traveling on the road, the bumps from the ground will be converted into thousands of twisting movements per minute to test the body. If the body is combined with precision and strength, the noise inside the car is frequent, the noise is loud, and the possibility is serious. Parts that are mounted on the vehicle, such as the gearbox, damage to the front and rear axles, or broken bodies. In fact, no matter how good the road conditions, our cars are constantly undergoing high-intensity twisting movements, and as speed increases and the distance increases, this test will become more and more severe and directly related to the safety of drivers and passengers.
What exactly is laser welding?
Laser technology uses a polarizer to reflect the laser beam to concentrate the beam that produces a large amount of energy in the focusing device. If the focus is close to the workpiece, the workpiece will melt and evaporate within a few milliseconds, so this effect can be used in the soldering process. The characteristic of laser welding is that the workpiece to be welded has very little deformation, almost no joint gap, and the welding depth/width ratio is high, so the welding quality is higher than the conventional welding method. However, how to ensure the quality of laser welding, that is, laser welding process monitoring and quality control is an important content in the field of laser utilization, including the use of various sensors such as inductors, capacitors, sound waves, photoelectrics, etc., through electronic computer processing, for different welding objects. And requirements, such as weld tracking, defect detection, weld quality monitoring and other projects, through the feedback control to adjust the welding process parameters, thus achieving automated laser welding. Therefore, laser welding is a highly technical and advanced manufacturing process.
The application of laser technology in the automotive industry
In the automotive industry, laser technology is mainly used for body welding, welding and parts welding. Among them, laser tailor welding is in the design and manufacture of the body. According to different design and performance requirements of the body, steel plates of different specifications are selected. The laser cutting and assembling technology is used to complete the manufacture of a certain part of the body, such as the front windshield frame and the door. Board, underbody, center column, etc.
Laser tailor welding has the advantages of reducing the number of parts and molds, reducing the number of spot welds, optimizing material usage, reducing part weight, reducing costs and increasing dimensional accuracy. Laser welding is mainly used for the welding of body frame structures, such as the welding of the top cover and the side body. The resistance spot welding of the conventional welding method has been gradually replaced by laser welding. With laser welding technology, the width of the joint between the workpiece joints can be reduced, which reduces the amount of sheet metal used and the rigidity of the car body. It has been part of the world's largest automakers and leading component suppliers for high-end cars. Adopted.
Shanghai Volkswagen adheres to the excellent craftsmanship of the German Volkswagen. It is the first in China to use laser welding technology. The total length of the full body laser welding of the fashion classic Polo is 6591 mm. What is even more admirable is that Shanghai Volkswagen has the spirit of insisting on continuously improving its own craftsmanship. The newly-launched multi-purpose car Touran has a large number of laser welding technology on its body, with a total length of 41 meters, which is nearly 5 times higher than POLO. It is a quantum leap, and it is also a qualitative leap in the true sense, which represents the most advanced manufacturing technology level in China.
Relying on the advanced laser welding process, the Tuan body welds reach the joint of the molecular bonding molecules. The strength of the weld is almost equal to the strength of a whole steel plate, and the welding quality is absolutely guaranteed. The side panels, inner panels and other related components of Touran are basically laser welded. In order to ensure the impact resistance of the side of the body, Shanghai Volkswagen also used laser welding on the Touran window frame reinforcement assembly, and the welding length also reached 2 Meter. At the same time, in the welding process, Shanghai Volkswagen used a three-coordinate measuring instrument to ensure the correct size of the body assembly space, so that the body quality is better guaranteed. All this has created the authentic "steel iron" of the Touran body. In the most authoritative European NCAP impact and safety performance test, Touran achieved a safety performance of up to five stars, rewriting this honour has always been granted only the practice of B, C-class cars.
As the latest multi-function car launched by Shanghai Volkswagen, Touran not only brings the latest car concept in Europe, but also provides a leading automobile manufacturing process for Chinese users. As the only overseas production base of Touran, Shanghai Volkswagen will be ahead of the United States, Japan and other markets, and will be listed on the Chinese market in the local production of Touran, allowing the majority of Chinese consumers to experience the advent of the era of multi-functional cars in advance!