In recent years, with the enhancement of people's awareness of environmental protection, it has brought great challenges to the development of cleaning industry all over the world. The so-called laser cleaning technology refers to the process of using high-energy laser beam to irradiate the surface of the workpiece to make the dirt, rust or coating on the surface evaporate or peel off instantaneously, so as to effectively remove the surface attachment or surface coating of the cleaning object, so as to achieve the cleaning process. It is a new technology based on the interaction between laser and material. It is different from the traditional mechanical cleaning method, chemical cleaning method and ultrasonic cleaning method (wet cleaning process). It does not need any CFC organic solvent that destroys the ozone layer. It has no pollution, no noise and is harmless to human body and environment. It is a kind of "green" cleaning technology.
Principle and application of laser cleaning technology: compared with traditional cleaning methods such as mechanical friction cleaning, chemical corrosion cleaning, liquid solid strong impact cleaning and high frequency ultrasonic cleaning, laser cleaning has obvious advantages. It has the advantages of high efficiency, fast, low cost, small heat load and mechanical load on substrate, no damage to cleaning, recyclable waste, no environmental pollution, safe and reliable, no harm to the health of operators, and can remove various coatings of different thickness and composition. The cleaning process is easy to realize automatic control and remote control cleaning. There are various cleaning methods in traditional laser cleaning industry, most of which are chemical and mechanical methods. With the increasingly strict requirements of environmental protection laws and regulations and the increasing awareness of environmental protection and safety, the types of chemicals that can be used in industrial cleaning will become less and less. How to find a cleaner and non damaging cleaning method is a problem we have to consider. Laser cleaning has the characteristics of no grinding, non-contact, no thermal effect and is suitable for all kinds of materials, which is considered to be the most reliable and effective solution. At the same time, laser cleaning can solve the problems that cannot be solved by traditional cleaning methods.
Compared with the traditional cleaning methods, such as laser cleaning, laser cleaning and chemical cleaning, it has obvious advantages.
1. Laser cleaning is a kind of "green" cleaning method. It does not need to use any chemical agents and cleaning solution. The waste materials are basically solid powder, small in size, easy to store and recyclable, which can easily solve the environmental pollution problems caused by chemical cleaning;
2. The traditional cleaning method is often contact cleaning, which has mechanical force on the surface of the object to be cleaned, which damages the surface of the object or the cleaning medium adheres to the surface of the object to be cleaned, which can not be removed, resulting in secondary pollution;
3. The laser can be transmitted through optical fiber, cooperate with robot hand and robot, and realize remote operation conveniently. It can clean the parts that are not easy to reach by traditional methods, which can ensure the safety of personnel when used in some dangerous places;
4. Laser cleaning can remove all kinds of pollutants on the surface of various materials, which can not be achieved by conventional cleaning. Moreover, the pollutants on the material surface can be selectively cleaned without damaging the material surface;
5. High efficiency of laser cleaning and time saving.
