Views: 17 Author: Site Editor Publish Time: 02-07-2022 Origin: Site
Laser cleaning technology has developed rapidly in the past two years. The research focus of laser cleaning technology is application, and laser cleaning machines are now used in many industries. So, what exactly is laser cleaning technology? Leapion Laser introduces today.
Laser cleaning technology refers to the process of using a high-energy laser beam to irradiate the surface of the workpiece to instantly evaporate or peel off the dirt, rust or coating on the surface, so as to achieve a clean process.
Academically: Laser ablation (the scientific name for laser cleaning) or photoablation is the process of removing material from a solid (or sometimes liquid) surface by irradiating it with a laser beam. At low laser flux, the material is heated by the absorbed laser energy and evaporates or sublimates. At high laser flux, the material is usually converted into a plasma.
Typically, laser ablation refers to the removal of material with a pulsed laser, but if the laser intensity is high enough, a continuous wave laser beam can ablate material. Excimer lasers of deep ultraviolet light are mainly used for photoablation. The laser wavelength used for photoablation is about 200 nm.
The depth of absorption of laser energy and the amount of material removed by a single laser pulse depends on the optical properties of the material as well as the laser wavelength and pulse length. The total mass ablated from the target per laser pulse is often referred to as the ablation rate. Laser radiation characteristics such as laser beam scan speed and scan line coverage can significantly affect the ablation process.
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. The specific details have been shared in the previous article "Five Special Talents of Laser Cleaning", and interested friends can learn about it.
Laser cleaning can be used not only to clean organic pollutants, but also to clean inorganic substances, including metal rust, metal particles, dust, etc. Laser cleaning technology has been very mature in practical applications, such as the following industries:
1. Cleaning of industrial molds;
2. Cleaning of military weapons and equipment;
3. Removal of old aircraft paint;
4. Cleaning of building exterior walls;
5. Cleaning in the electronics industry;
6. Precise degreasing and cleaning in the precision machinery industry;
7. Medical industry: a variety of medical specialties, including ophthalmology, general surgery, neurosurgery, ENT, dentistry, oral and maxillofacial surgery, and veterinary medicine.
1. Laser dry cleaning method, that is, decontamination by direct radiation of pulsed laser;
2. Laser + liquid film method, that is, first deposit a layer of liquid film on the surface of the substrate, and then decontaminate with laser radiation;
3. The method of laser + inert gas, that is, when the laser is irradiated, the inert gas is blown to the surface of the substrate. When the dirt is peeled off from the surface, it will be blown off the surface by the gas immediately to avoid re-contamination and oxidation of the surface;
4. After using the laser to loosen the dirt, use non-corrosive chemical methods to clean it.
Currently the most commonly used are the first 3 methods. The fourth method is only found in the cleaning of stone artifacts.
As a green and low-carbon cleaning technology, laser cleaning plays an important role in many fields. For more information and professional questions about laser cleaning machines, please pay attention to Leapion Laser, Leapion Laser is online 7×24 hours.
