- Never point the laser beam at anyone’s eyes!
- Do not look directly into a laser beam!
- Always wear protection glasses!
- If the laser light accidentally strikes your eyes, close your eyes and immediately move your head out of the laser beam.
- Do not use any focusing optical device to look at the laser beam while working with lasers.
Lasers used for welding applications radiate inthe infrared spectra, which are not visible to the humaneye. The intensive fiber laser light radiate in the visible spectrum but invisible for humans, is especially dangerous to the eye. Fibre laser radiation penetrate through to the retina which can be destroyed irrevocably by relatively little radiation.
Misdirected laser radiation can come directly from the laser and threaten the eyes as a result of a faulty parameter setting, an opened cover, a displaced mirror etc. Other hazards include skin burn or inﬂammation from combustible materials as a result of misdirected laserradiation. The greatest hazard, however, usually stems from reﬂected laser radiation: the major share of the laser radiation is reﬂected by coldmaterial ﬁrst. To this we can add reﬂections of work piece edges, as a result of turbulence in the weld pool etc.
Misdirected radiation and reﬂections must be blocked off. That is why the law stipulates that the laser beam and the work zone must be in an enclosure. Beyond that, all those present, and the machine operators in particular, should wear protective goggles that are appropriate for the laser radiation being used. Fbre laser radiation are very dangerous to the eye and require special protective measures andapproved safety goggles.
Standard protective goggles made of glass or acrylic glass are not suitable at all,
as glass and acrylic glass allow ﬁbre laser radiation to pass through!
It is possible to use industrial lasers without enclosures!
However, in order to make them safe to use, personal protective equipment must be used (laser safety glasses) and access to the surrounding area needs to be controlled by interlocks or other means.
Special signage is required and other procedures must be implemented to enforce the laser-controlled area.
First of all, we need to talk about the most dangerous emissions into the atmosphere from welding, both for professionals and for those who use the finished product.
One of the most important risk factors for you, especially for operators, comes from the radiation emitted during welding: the most dangerous are ultraviolet radiation, as it is absorbed almost entirely by the skin and eyes. The protection of each exposed area is the most effective solution. Much les dangerous is the infrared light radiation.
Welding fumes, on the other hand, are a very different problem: the effect changes according to the welded metal, going from problems with the respiratory system to damage to the skeletal system. For this reason, during welding, the work area must be well ventilated, or equipped with the right suction machinery.
Another element that requires suction are the so-called welding powders, very small particles of material with high toxicity and capable of penetrating the respiratory system. Electrode welding has the highest concentration of dust among all welding techniques, so you need to protect yourself with a mask
Depending on the materials being welded, laser welding may generate fumes, altough much less than any other welding process, that are hazardous to health.
Therefore, it is important to always provide sufﬁcient extraction and fresh air.
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