Replacement process of focusing mirror and reflecting mirror of fiber laser cutting machine

When the laser cutting machine is used for a period of time, the laser lens will appear film peeling, metal residue, dents, scratches, etc., which will greatly reduce the function of the laser cutting machine. Replace with new protective lenses in time. So what should be paid attention to when installing the laser lens?


1. You need to wear rubber gloves when taking out the lens. The oil on the skin will contaminate the lens and affect the performance of the lens.


2. When taking the lens, you can only pinch it with your hands, and do not use hard tools such as tweezers.


3. When the lens is temporarily stored, it needs to be placed on a special lens paper to avoid scratches during storage and removal.



Precautions for lens cleaning:


1. Use an air ball to blow off the fluff, dust and floating objects on the surface of the lens. Do not use compressed air. The compressed air contains a high amount of oil and moisture, which will seriously pollute the protective lens.


2. Use a cotton swab or cotton ball dipped in propyl alcohol to slowly and gently clean the lens surface. When wiping the surface of the lens, you need to scratch it as soon as possible, which is conducive to the volatilization of the propanol and will not leave streaks.


Note: Use cotton swabs with paper handles and high-quality surgical cotton balls. 2) Reagent grade propanol is recommended.


3. To moderately clean moderate contaminants such as oil or perspiration, dampen a cotton swab or cotton ball with white vinegar, scrub the surface with very little force, then wipe off excess white vinegar with a dry cotton swab. Immediately then dampen a cotton swab or cotton ball with acetone and gently wipe the surface to remove any residual acetic acid.



If the lens is still ineffective after cleaning using the above cleaning process, it may be that the film layer of the lens has been wiped off, the lens has lost its function, and a significant change in color from the original lens indicates that the film layer has fallen off.



1. For those extremely polluted lenses, such as metal spatter is very serious, we use a polishing paste to remove these contaminants. Shake the polishing paste well, pour 4-5 drops onto a cotton ball, and let the cotton ball move in a circular motion on the lens. There is no need to press down the cotton ball, the weight of the cotton ball is enough. If you use too much pressure, the polishing paste will quickly scratch the surface. Flip the lens frequently to avoid over-polishing in one direction. The polishing time should be controlled within 30 seconds. At any time, a color change is found, and polishing is stopped immediately, indicating that the outer part of the film is being corroded. Toothpaste can be used without polishing paste.


2. Wet a new cotton ball with distilled water and gently wipe the surface of the lens. Wet the lens completely and remove as much residual polishing paste as possible. Be careful not to let the lens surface dry, which will make it difficult to remove the remaining polishing paste.


3. Quickly dampen a fluffy cotton swab with propanol and gently clean the entire lens surface to remove as much residual polishing paste as possible. NOTE: If the lens is more than 2 inches in diameter, use a cotton ball instead of a cotton swab for this step.


4. Wet a fluffy cotton swab with acetone and gently clean the lens surface. Remove the polishing paste and propanol from the previous step. For the final wash with acetone, a cotton swab is gently swiped across the lens, overlapping until the entire surface is wiped. During the final scrub, move the swab slowly to ensure that the acetone on the surface dries quickly. This eliminates streaks on the lens surface.


5. Inspection of clean lenses The final step is to carefully inspect the surface of the lens on a black background in sunlight. If you find that there is still polishing paste residue, you can repeat until it is completely removed. NOTE: Some types of contamination or damage cannot be removed, such as metal splashes, dents, etc. If such contamination or damage is found on the lenses, you will need to have them repaired or replaced with new ones.

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