Traditional cleaning industrial equipment has a variety of cleaning methods, mostly using chemical agents and mechanical methods for cleaning. Compared with traditional cleaning methods such as mechanical friction cleaning, chemical corrosion cleaning, liquid solid high-strength impact cleaning, and high-frequency ultrasonic cleaning, laser cleaning has the characteristics of no grinding, non-contact, low thermal effect, and applicable to various materials and other cleaning features. Think of it as the most reliable and effective solution.
Due to the complex composition and structure of the surface attachments, the mechanism of laser interaction with them is also different. The most commonly used theoretical models for this explanation are the following:
1. Phosgene gasification/photolysis
The laser generated by the laser can achieve high concentration of energy through the focusing of the optical system. The focused laser beam can generate high temperatures of several thousand degrees or even tens of thousands of degrees in the vicinity of the focal point, and instantaneously vaporize or decompose the attachments on the surface of the object.
2. Light stripping
By the action of the laser, the attachment on the surface of the object is thermally expanded. When the expansion force of the attachment on the surface of the object is greater than the adsorption force between the attachment and the substrate, the attachment on the surface of the object will be detached from the surface of the object.
3. Optical vibration
A pulsed laser with a higher frequency and power is used to strike the surface of an object and an ultrasonic wave is generated on the surface of the object. The ultrasonic wave returns after hitting the hard surface of the lower middle layer and interferes with the incident sound wave, thereby generating a high-energy resonant wave, which causes microscopic cracking and crushing of the dirt. From the surface of the matrix material, this cleaning method can be used when the absorption coefficient of the laser beam between the object and the surface attachment is not very different, or when toxic substances are generated after the surface attachment material is heated.
At present, there is no uniform standard for the structure of laser cleaning equipment, which needs to be determined based on factors such as the actual cleaning method, the type of substrate and dirt, and the effect of cleaning requirements. However, they are still roughly the same in some basic structures. It mainly includes lasers, mobile platforms, real-time monitoring systems, semi-automatic control operating systems, and other auxiliary systems.