Aircraft have almost strict requirements on safety. Therefore, in the aviation industry, whether it is production or maintenance, the first thing that comes to mind is not cost, but safety when improving every process.
As the main structural material of the space shuttle, aluminum alloys are widely used in key parts such as spacecraft skins, propellers, fuel tanks and landing gear struts. Aluminum with copper as the main alloying element is mainly used to produce large aircraft skin components due to its high strength, high heat resistance and good processability. Aluminum exposed to air will naturally form an uneven and discontinuous oxide film on the surface, which must be completely removed before the components are repainted and welded, otherwise it will affect the adhesion of the coating and the quality of the weld.
At present, the mixture of chromic acid, sulfuric acid and hydrofluoric acid is generally used for rolling aluminum alloy parts to remove the oxide film on the surface, while nitric acid is generally used to remove the die casting parts, but the chemical cleaning method requires manual participation, and causes environmental damage. Pollution, cleaning quality is also difficult to guarantee.
In recent years, laser cleaning has become one of the mainstream directions of cleaning technology because of its wide applicability, processing accuracy and environmental protection of the cleaning process, and is widely used in industrial links before and after welding and surface coating removal. Based on this, it is an effective means to use laser cleaning as a treatment method before aluminum alloy spraying and welding.
In the cleaning application of aviation aluminum alloy surface, it is also necessary to prevent the damage to the anodic oxide film on the aluminum alloy surface, and to ensure that the anodic oxide film on the aluminum alloy surface is protected during laser cleaning. When cleaning a large area, meeting a certain cleaning efficiency is also a prerequisite for production and application. The laser cleaning machine launched by Shengtong Intelligent Laser Equipment Group can be applied to various application scenarios of aerospace, and customers can choose suitable laser cleaning machine models according to different needs.
Different from the traditional cleaning process, laser cleaning has completely opened up a new idea of industrial cleaning technology. It is a new type of green and environmental protection process, which can be applied to the cleaning of the surface and parts of most aerospace aluminum alloy materials before welding. While effectively removing rust, oil, film, oxide scale, paint and other pollutants on the surface of the object, it will not damage the substrate. At the same time, it has the advantages of no pollution, no consumables, precision cleaning in optional areas, and high cleanliness.
