Application of laser welding robot in aerospace field
The use of welded integral fuselage panels instead of traditional riveted fuselage panels can greatly reduce the weight of components, reduce manufacturing costs, and improve production efficiency, so it has become one of the development trends of large-scale civil aircraft manufacturing technology. Because the double laser beam welding has a more obvious weight reduction effect on the skin truss structure, and has better spatial accessibility for complex components, it has received extensive attention. At present, aviation manufacturing companies such as Airbus have adopted laser-welded integral fuselage panel manufacturing technology on their various models. However, the manufacturing technology of integral fuselage panel based on welding is one of the difficulties in the manufacturing technology of contemporary civil aircraft. At present, the new aluminum alloy welding technology of the fuselage wall plate in the design scheme of my country’s large passenger aircraft has its own characteristics in terms of manufacturability.
Robots are used in all walks of life because of their high repeatability, good reliability, and strong applicability. However, the current aerospace product manufacturing process is still labor-intensive, complicated in procedures, and harsh working conditions, supplemented by a large number of fixtures and hand-made. main. The lack of automatic production capacity has become a bottleneck restricting the improvement of the reliability and production capacity of weapons and equipment. Under the background of my country’s vigorous development of aerospace, aerospace manufacturing enterprises use industrial robots for automated production, which is of great significance to the transformation and upgrading of enterprise production models and the improvement of advanced manufacturing capabilities. Welding is an important part of the manufacturing process of aerospace products. The role of the laser welding robot here is extremely important.
At present, laser welder technology is still one of the most effective methods for aluminum alloy welding in the aerospace field. With continuous testing and research, laser welding gradually showed its good process performance and mechanical properties after welding. Compared with traditional TIG welding and MIG welding, laser welding has the characteristics of high welding quality, high precision and fast speed. It is one of the fastest developing and most researched methods at present. In recent years, many international researchers have carried out a lot of research on aluminum alloy laser welding, and gradually formed a relatively reliable aluminum alloy laser welding technology.
Compared with the traditional riveted fuselage panel, the laser welded fuselage panel has obvious weight reduction effect, which can improve the performance of the connection part, and at the same time, it has the advantages of reducing the manufacturing cost and improving the production efficiency. However, the stress concentration and deformation problems caused by laser welding do not exist in the riveting process. The laser welding process of large passenger aircraft fuselage panels is a complex welding process with large size, small thickness and multiple welds, and its deformation process is very complicated.