As an emerging green surface cleaning technology, laser ablation metal cleaning make high-energy-density lasers directly act on pollutants by means of non-mechanical contact, overcome the binding force between pollutants and substrates, and cause pollutants to gasify and burn. Erosion or stripping, to achieve a cleaning technology with a high degree of automation and work efficiency. Among them, laser cleaning of metal surfaces is a very practical technology.
Laser cleaning of metal surfaces is a technology that uses high-energy laser beams to clean metal surfaces. It can effectively remove impurities and oxides on the metal surface, restore the original luster and smoothness of the metal surface, and improve the quality and surface of the metal. performance. Compared with traditional cleaning methods such as mechanical friction, chemical corrosion, and high-frequency ultrasonic cleaning, laser ablation metal cleaning has the advantages of environmental protection, non-contact, precise control, and no damage to the substrate. It has important application prospects.
Application of metal cleaning laser in aviation field:
Laser ablation metal cleaning is used in the aerospace field. In aerospace systems, superalloys, titanium alloys, aluminum alloys and other materials are widely used. In the aviation industry, titanium alloys are used as materials for aircraft and engine structural components. Titanium has high chemical activity and forms an oxide film during the thermoforming process. In the process of welding with materials, the surface state of the materials to be welded plays a decisive role in the welding quality. In order to obtain high-quality welds, it is necessary to thoroughly remove the oxide layer and other pollutants on the surface of the material to be welded before welding.
The current method of surface treatment of the material to be welded is mainly mechanical cleaning method and chemical cleaning method, there are incomplete removal, labor-intensive, environmental pollution, substrate damage, can not be cleaned for large size parts and other disadvantages, it is difficult to ensure the stability of the welding quality. Laser ablation metal cleaning as a highly efficient, non-destructive, environmentally friendly new method, the use of laser beam focused on the surface of the material, so that the physical or chemical reaction of the surface material from the surface, so as to achieve the purpose of pre-treatment of the surface to be welded before welding.
Applications of metal cleaning lasers in railways:
Railway tracks are laid in the open air, and the surface is prone to rust due to factors such as rain and sunlight. Rail track surface and the inner rust layer dirt serious, easy to cause poor rail circuit split, affecting the transmission of railroad signals, endangering the safety of traffic. At present, there are mainly two methods of manual grinding and derusting and large-scale rail derusting and grinding machines to remove the rust layer and dirt on the rails in operation. Manual grinding and rust removal is the main method of rail maintenance at present, but its labor intensity is high, the operation is difficult, the work efficiency is low, and the quality of rust removal is difficult to guarantee.
Large-scale rail derusting and grinding machine, the equipment has a large power and a large volume. It needs to have its own generator, which needs to be driven by the traction locomotive to run on the railway. It is necessary to submit a transportation plan before the operation. The occupation of the line during the on-site operation will affect the driving transportation, and the cost If it is too high, it will have a great impact on the environment around the rails.
Laser rust removal is a new rust removal method developed in recent years. Laser rust removal equipment is suitable for operators to work alone. Laser ablation metal cleaning has the advantages of low rust removal cost, environmental protection, high efficiency, good rust removal quality, and no damage to the rail base material. It does not need to apply for a railway transportation plan. Complete the job, these advantages are not available in the existing rust removal methods, laser rust removal will gradually replace the traditional rust removal methods, and may be more and more used in the railway sector, and will become the mainstream method of rail rust removal.
Advantages of laser cleaning metal surface technology:
The principle of laser ablation metal cleaning is to use the high energy, high density and high focus of the laser beam to heat and evaporate the impurities and oxides on the metal surface to separate them from the metal surface, thereby realizing the cleaning treatment of the metal surface. Compared with traditional mechanical cleaning and chemical cleaning methods, laser cleaning of metal surfaces has the following advantages:
First, the metal cleaning laser can achieve non-contact cleaning, will not cause any mechanical damage to the metal surface and chemical corrosion, to avoid the traditional cleaning methods may cause secondary pollution and environmental pollution problems. This is especially important for metal products that require high surface quality, such as components in aerospace, automotive and other fields, as well as precision instruments and electronic components.
Secondly, laser cleaning metal can accurately control the cleaning depth and cleaning range, avoiding the problems of excessive cleaning or incomplete cleaning caused by improper operation in traditional cleaning methods, and also saving cleaning costs and time.
In addition, laser cleaning can be applied to a variety of metal materials, such as steel, aluminum, copper, etc., and is not limited by the shape and complexity of the metal surface. This makes laser cleaning metal surface can be widely used in the cleaning and treatment of various metal products.
In general, laser cleaning is a multi-purpose cleaning equipment, which can be applied to various materials, such as steel, aluminum, copper, carbon steel, non-ferrous metals, ceramics, glass, etc. It is a new generation of industrial cleaning technology ideal choice. With the continuous development of science and technology, laser cleaning metal surface technology will become more mature and perfect, bringing more practical applications and economic benefits to all walks of life.