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Raycus Laser: A new breakthrough in glass coating cleaning, fiber lasers can also be perfectly interpreted!
Views: 0 Author: hu Publish Time: 2022-06-22 Origin: dapeng
Raycus Laser: A new breakthrough in glass coating cleaning, fiber lasers can also be perfectly interpreted!
Laser cleaning technology development
(1) What is laser cleaning?
It refers to the use of high-energy laser beams to irradiate the surface of the workpiece to instantly evaporate or peel off the dirt, rust spots or coatings on the surface, and to effectively remove the surface attachments or surface coatings of the cleaning object at high speed, so as to achieve a clean process. It is a new technology based on the interaction effect of laser and matter. Different from 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, and is pollution-free. , a "green" cleaning technology that is noiseless and harmless to the human body and the environment.
(2) What is the principle of laser cleaning?
(3) How is the laser cleaning energy distributed?
The green-red dotted line area is the processing window
If the energy density is higher than the ablation threshold of the substrate, the substrate is easily damaged, and the roughness can be increased; if the energy density is lower than the ablation threshold of the pollutants, the cleaning effect cannot be achieved.
Gaussian spot
Round flat top spot
Square flat top spot
The peak part of Gaussian light is very easy to damage the substrate. Typical applications are the removal of oxide layers such as aluminum alloy, copper, and iron. If you do not want to damage the substrate, such as mold cleaning, flat top light is preferred. Typical applications are mold cleaning, precision Parts degreasing, paint layer removal, etc.; improve cleaning efficiency without damaging the substrate, preferably square flat top spot distribution.
Glass coating cleaning application case
RFL-P300H
The RFL-P300H laser is a circular spot multi-mode laser, the maximum single pulse energy is 15mJ, the focused spot diameter is about 0.36mm, and the beam quality factor M2 is 10.
Laser Coated Glass Irradiation Spot Pattern
Laser coating cleaning microscope image
The parameters of glass single silver film removal are: 130ns, 300W, 30kHz, line width 15mm, cleaning speed 6m/min, which can clean the coated surface, the surface is transparent, and the horizontal and vertical light spots can also be overlapped.
Several sets of process parameters tested are shown in the following table:
RFL-P500H
The RFL-P500H laser is a circular spot multi-mode laser with a maximum single pulse energy of 50mJ, a focused spot diameter of about 1mm, and a beam quality factor M2 of 62.5.
Laser-coated glass irradiation spot pattern.
Laser coating cleaning microscope image
The parameters of glass single silver film removal are: 100ns, 500W, 15kHz, line width 15mm, cleaning speed 8m/min, which can clean the coated surface, the surface is transparent, and the horizontal and vertical light spots can also be overlapped.
Several sets of process parameters tested are shown in the following figure:
From the above data, it can be seen that the repetition frequency is 15kHz, the cleaning speed is 5m/s, the cleaning is more thorough, and the white color is more obvious.
Solar panel coating cleaning
Cleaning requirements: In order to insert the edge into the aluminum frame, the cleaning width is required to be 10mm, and the black coating on the reverse side is removed from the other side, and the glass substrate must not be damaged. The efficiency is at least 6m/min, and the color is transparent after cleaning.
The test effect is shown in the following figure:
The effect of the solar panel coating layer after cleaning
It can be seen from the above test that the cleaning efficiency of the solar panel coating layer with P300H can reach 6m/min, the result after cleaning is transparent, and the cleaning effect meets the cleaning requirements.
