According to BMW's experts, BMW has adopted dual-focus laser welding technology when welding partitions. Because the technology in the aluminum alloy welding process has a very good performance, it is widely used in the BMW's mass production process.

In laser welding, dual-focus laser welding technology can be welded on the material to form a very small two focal points, can achieve the laser beam splitting and stacking. The addition of two laser light sources to form a laser beam can greatly improve the laser power, production stability, product quality and production flexibility. laser

Welding power on the one hand can improve the depth of laser welding seam; on the other hand can improve the welding speed of laser welding; at the same time can avoid the common aluminum alloy welding hole and burn the welding defects.

From the perspective of the laser welding technology of the user enterprise, a problem that is not completely solved is the standardization of laser welding technology. The problem is embodied in the connection interface of the equipment and the different parts of the welding equipment. BMW experts point out that standardization will make laser optics, parts of raw materials

Production and manufacturing in the world to achieve simplification. VW's experts are similar to those of BMW's experts and believe that standardization can also improve the effectiveness of laser equipment. The medium that produces the laser is an extremely thin reflective sheet with a thickness between several percent and two hundred percent. The pulsed laser beam is refracted by a compact refractor system several times and is finally emitted by the crystal. Although the thickness of the reflector sheet is small, the reflectivity is extremely high and the overall efficiency is high. Mr. Hügel believes that this laser technology combines CO2 laser technology with the advantages of Nd: YAG solid-state laser technology, in the future can open up more new applications.

The use of laser welding is growing, the German VW's Touran sedan is a good example. In this new car, the number of laser solder joints reached 1400, the total length of the weld up to 70m. In the production of comfortable and beautiful open-top cars, VW's technical staff and Austrian welding experts Fronius company developed a laser hybrid welding technology. In the high-level convertible car door, laser welding welding length of the weld reached 3570mm, is pure laser welding weld length of 3 times.

VW company's material experts believe that: compared with pure laser welding technology, the use of laser hybrid welding technology can greatly improve the gap between the plate metal connection capacity. Which makes VW company can make full use of laser high-speed welding arc welding process stability. Another application example is the BMW 5 Series BMW sedan aluminum alloy partition with this laser hybrid welding technology and internal high pressure deformation of the aluminum alloy stent welded together.

Laser hybrid welding technology has significant advantages over a variety of laser welding technologies that are used alone. For laser mixing, the advantages are mainly reflected in: greater penetration / large gap welding capacity; weld toughness better, by adding auxiliary materials can affect the weld lattice organization; no burn wear when the back of the weld Sagging; wider scope of application; less investment by means of laser replacement technology. For laser MIG inert gas shielded welding, the advantages are mainly reflected in: high welding speed; welding depth; produce less heat of welding; weld strength; weld width is small; So that the whole system of the production process is stable, good equipment availability; weld preparation and welding after welding a small workload; welding production time is short, low cost, high production efficiency; has a good optical equipment configuration performance The However, the investment cost of laser hybrid welding in power supply equipment is relatively high. With the further expansion of the market, the price of power equipment will also decline, and will make laser hybrid welding technology in more areas to be applied. At least laser hybrid welding technology in the aluminum alloy welding is a non-

Often suitable welding process, will be in a long period of time to become the main welding production tools. On the contrary, Trumpf Gesch? FtsbereichsLasertechnik spokesman said: in the laser technology, every year new progress. So there is a very strong competition between the manufacturers of laser equipment, which naturally hindered the development of different laser technology equipment, development of enterprise unified product development. The so-called standardization can only be achieved in the final standardization of laser cable interface. And to do this step is the prerequisite for durability, warranty three packs of responsibility and three packs of the process to be explained and recognized. On the other hand, the spokesman also agreed that in the laser application technology in various fields, the development trend of laser performance is constantly improving. This trend can increase the power of the laser and improve the laser beam quality. With new laser generation solutions and new laser equipment design, including new laser technology applications, this trend can be achieved in the near future.