The original light emitted by the laser is transmitted through the outer optical path system (including reflection and transmission), which is accurately irradiated to the surface of the workpiece at a very high power density. The optical component of the system should be checked regularly, timely adjustments to ensure that when the cutting torch above the workpiece when running the beam properly transferred to the center of the lens and focused into a very small spot, high quality cutting of workpiece. Once any of the optical components are changed or contaminated, the quality of the cutting will be affected and even the cutting cannot be carried out.
The outer light path lens is polluted by impurities in the airflow, and the spatter of the cutting zone, the particle bonding or the insufficient cooling of the lens can cause overheating of the lens and influence the energy transmission of the beam. Causes the light path collimation drift to bring about the serious consequence, the lens overheating can also cause the focus distortion, even endangers the lens itself.
Once the optical components are contaminated and even stuck to the small particles of the cutting product, cleaning is a very important and often neglected problem. Some cleaning points are listed below:
(1) lens cleaning: clean the lens paper bent into several fold, with a few drops of pure acetone soaked; gently wipe the lens surface wet lens paper, lens can't note finger pressure; repeated several times, until the lens surface clean, no dirt and residual traces in the mirror; dry air drying; necessary you can use a few drops of acetone wet paper into rod lens, gently scrub the surface of the lens, to remove the heavy dirt drops.
It is important to note that acetone absorbs moisture and moisture from the air, polluting the acetone itself. Therefore, it is important to keep the acetone bottle tightly closed and never pour the remaining acetone solution back into the new acetone bottle.
(2) cleaning mirror lens: remove the lens from the frame; the mirror upward, the lens paper on the mirror; in the lens paper a few drops of acetone, and gently pull up a mirror lens paper; repeat the above process until the mirror clean, no dirt and stains in the mirror to the lens; in the mirror seat.
If you use a molybdenum mirror as a reflector, because it can not be plated, and can be used directly after polishing, it can be cleaned with water (soap, water or water containing detergent). However, other surface coated lenses can not be cleaned with water, because many of the coating dissolved in water, the lens will be damaged.