Application and future prospect of laser cleaning

Laser cleaning has been widely used in many industrial fields, including aerospace, high-speed rail, automobiles, ships, semiconductors, molds and nuclear power. Some application cases are as follows:

Laser paint removal

Laser paint removal can be used for surface paint removal in aircraft, high-speed rail and other maintenance processes, as well as some precision paint removal applications. In the application process, attention should be paid to the damage of the laser to the surface of the substrate, and the appropriate light source and external optical path design should be selected. In the application of paint removal on the surface of aviation aluminum alloy, it is necessary to prevent the damage to the anodic oxide film on the surface of the aluminum alloy, and to ensure that the anodic oxide film on the surface of the aluminum alloy is protected while the laser paint is removed. When removing paint on a large area, meeting a certain cleaning efficiency is also a prerequisite for production and application.

Laser rust removal

In the manufacturing process of many large steel structures, equipment and infrastructure, a large amount of steel is used. In the process of transportation and storage of steel, it is easy to rust on the surface due to contact with wet environment, contact with sweat or contact with other corrosive media. For localized rust, laser cleaning technology is a good choice. The 200W MOPA pulsed fiber laser is used to remove rust, and the efficiency can reach 5-20 square meters per hour (depending on the degree of rust). The cleaning sample is shown in the figure below.

Mold cleaning

Regular cleaning of composite molds, tire molds and other rubber product molds during use can use laser cleaning technology to replace traditional manual grinding, dry ice cleaning or sandblasting, etc., in order to improve efficiency or reduce costs. Taking tire mold cleaning as an example, laser cleaning can make it less than 1/10 of the cost of dry ice cleaning with basically the same efficiency. The cases of mold cleaning are as follows:

In addition to the above applications, laser cleaning technology has applications in many processes such as welding pretreatment, coating removal, and oil stain cleaning, and it is difficult to list them one by one. Generally speaking, because my country is later in research and application than European and American countries, it lags behind European and American countries in industrial application. According to public information, the United States has maturely applied laser cleaning technology to the surface cleaning of F-16 fighter jets and C-130 transport aircraft. Using laser cleaning. Similar applications are still in the initial experimental stage in our country, but it can also be seen that it is necessary and promising to vigorously develop laser cleaning technology.

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