LASER NEWS

Laser welding heads are the most widely used laser welding technology in the automotive industry. In addition, there are laser marking technology, laser cutting technology and so on. It was first used for laser head welding of automotive gearbox gear sets. Use a 213KW CW co2 laser. Equipped with necessary cleaning, compaction, rotary table, laser, water cooling system, light guide system, protective gas system and online testing equipment. The whole set of equipment can weld two pieces per minute. Through long-term operation, a complete set of laser head processing management system has been formed, and a lot of work experience has been accumulated. The feasibility of the welding technology of automobile gear laser welding head has been fully affirmed by the manufacturer, and it has become a mature fixed technology in the automobile manufacturing industry.

Another typical example is PPS and LCP plastics. The transmittance of both materials to near-infrared laser light is very low. If both materials are filled with carbon black at the same time, laser welding cannot be performed because the laser cannot penetrate. Additionally, many mineral filler compounds are not suitable for laser head welding. In order to overcome these limitations of laser welding head welding, some plastic manufacturers are actively developing new materials, which help to improve the laser transmittance and absorption rate, and have made gratifying progress, bringing broader application prospects for laser welding heads .

Laser head hybrid welding technology has obvious advantages. For laser head hybrid welding, its advantages are mainly reflected in: no sagging on the back of the weld, and a wide range of applications; for laser-MIG welding, its advantages are mainly reflected in: fast welding speed, large welding depth, less welding heat, and high welding strength , The welding seam width is small, the welding seam bulge is small, so that the whole system production process is stable, the equipment is excellent and usable, the welding preparation workload is small, the welding processing workload after welding is small, the welding production time is short, the cost is low, and the production efficiency is high.

Whether from domestic or foreign laser head welding practice, future research on laser head welding technology will focus on the following three aspects: First, effective control of the welding process. Second, the development and upgrading of lasers. Finally, it is the dynamic monitoring of welding defects. Secondly, improving the photoelectric conversion efficiency is the core content of the research and development and upgrading of the laser head, because the structure of the laser in our country is still very complex, how to improve and improve the internal structure and external performance. The laser head is one of the most important tasks at present. In the third aspect, since a single sensing technology cannot meet the requirements of many complex detection tasks, it is necessary to further develop monitors.