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Principle And Classification Of Laser Cleaning

Traditional cleaning industrial equipment has a variety of cleaning methods, mostly using chemical agents and mechanical methods. 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 the characteristics of no grinding, non-contact, low heat effect and suitable for objects of various materials. It is considered to be the most reliable and effective solution.

Due to the complex composition and structure of the attachment on the surface of the object, the action mechanism of laser and it is also different. The most commonly used theoretical models for explaining this are as follows:

1.Phosgenation / photodecomposition

The laser generated by the laser can achieve high concentration of energy through the focusing of the optical system. The focused laser beam can produce a high temperature of thousands or even tens of thousands of degrees near the focus, which makes the attachments on the surface of the object vaporize or decompose instantly.

2.Light stripping

The attachment on the surface of the object is heated and expanded by the action of laser. When the expansion force of the attachment on the surface of the object is greater than the adsorption force between it and the substrate, the attachment on the surface of the object will be separated from the surface of the object.

3.Light vibration

The pulsed laser with higher frequency and power is used to impact the surface of the object and generate ultrasonic wave on the surface of the object. The ultrasonic wave returns after impacting the hard surface of the middle and lower layers and interferes with the incident sound wave, so as to generate high-energy resonance wave, which makes the dirt micro burst, crush and separate from the surface of the matrix material. When the absorption coefficient of the laser beam between the object and the surface attachment is little different, Or when the surface attachment will produce toxic substances after heating, this cleaning method can be selected.

At present, the structure and cleaning effect of the laser are basically the same as those of the real-time cleaning system, but they are basically determined according to some factors, such as the structure of the laser and the actual cleaning system Semi / automatic control operating system and other auxiliary systems.

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