Views: 1 Author: DURMAPRESS Publish Time: 2022-02-25 Origin: DURMAPRESS
Principle and method of 1500W laser cleaning Laser Laser Laser is characterized by high directional monochromaticity, high coherence and high brightness. By focusing and switching the lens, energy can be concentrated into a small space and time range. In laser cleaning processing, the following characteristics of laser are mainly used
1 laser can achieve energy in the height of time and space, the focused laser beam near the focus can produce thousands of degrees or even tens of thousands of degrees of high temperature, so that the dirt warm room evaporation, gasification or points
2, the divergence Angle of the laser beam is small and the direction is good through the concentrating system can make the laser beam focus into different diameters of the light spot. Under the condition of the same laser energy, the energy density of laser beam with different diameters can be adjusted to make the dirt expand by heat. When the swelling force of dirt is greater than the adsorption force of dirt to the matrix, dirt will be separated from the surface of the object.
3, laser beam can produce ultrasonic wave on the solid surface to produce mechanical resonance, so that the dirt is broken off. Laser cleaning technology is to use the characteristics of the laser to achieve the purpose of cleaning. Laser cleaning mechanism can be divided into two categories according to the optical properties of the substrate and dirt being cleaned: one is the use of cleaning substrate (also known as the parent) and surface attachment (dirt)
The absorption coefficient of one wavelength laser energy and have very big difference, the laser energy that radiates to the surface is absorbed mostly by the surface attached good thing place, be heated thereby or gasify su hair, or expose eyeball
Expansion and is driven by the air flow, from the surface of the object to achieve the purpose of cleaning. The substrate absorbs very little energy from the laser at that wavelength without being damaged. For this kind of laser cleaning, the selection of activated wavelength and control of laser energy are the key to achieve safe and efficient cleaning. Another kind of substrate suitable for dry cleaning and surface attachment of the laser energy absorption coefficient of little difference or substrate
The coating is sensitive to acidic su gas formed by heat or coating number after heat will produce toxic substances and other cleaning methods, this kind of method is the use of high power and high repetition rate of pulse laser
Striking the cleaned surface converts part of the light beam into sound waves. The return portion of the sound wave that hits the underlying hard surface interferes with the incident sound wave generated by the laser, creating a high-energy wave that causes a small explosion of the coating which is crushed into powder and removed by a vacuum pump without damaging the underlying substrate.
There are four methods to analyze laser cleaning:
1 laser dry cleaning method, namely the use of pulse laser direct radiation decontamination:
2. Laser + liquid film method, that is, first deposit a layer of liquid film dry matrix surface, and then use laser radiation to decondify: when the laser irradiates the dry liquid film, the liquid film is rapidly subjected to explosive vaporization and explosive shock wave to loose the dirt on the surface of the body, and fly away from the processed object with the shock wave
Body surface to achieve the purpose of decontamination.
3, laser + gas method, that is, at the same time of laser radiation, with gas blowing to the surface of the matrix, when the dirt is stripped from the surface will be immediately blown off the surface of the gas to avoid surface pollution and oxidation:
4, after the use of laser dirt loose
Laser cleaning equipment features
1, independent research and development to reach the international advanced level of YAG laser and pulse Q technology production of laser cleaning machine.
2, non-contact cleaning does not damage the parts matrix.
3. Precise cleaning can realize selective cleaning of precise position and precise size.
4, do not need any chemical cleaning liquid without consumables safety and environmental protection.
5 Simple operation tongshen can be hand-held or with the manipulator to achieve automatic cleaning
6, cleaning efficiency is very high time saving.
7, laser cleaning system is stable and even without maintenance.
The application industries are mould industry, automobile manufacturing, ship industry, food processing, sewage treatment, rubber tires, petrochemical industry and other industries.