Laser cutting machine operation hazards and preventive measures

In the laser cutting machine industry, the operator’s awareness of the laser cutting machine is weak, ignoring the operator and debugging personnel’s own harm, the following is a brief introduction:

International Grade Classification of Lasers

This classification is an international standard classification, which is recognized and consistent by the scientific community all over the world. This is convenient for the safety level of laser equipment and national trade. Classification is divided into: level 1, level 2, level 3, level 4, divided into 4 levels. The higher the classification level, the greater the risk. Laser grade regulations must be marked with Roman numerals on the laser system. All regular laser products are generally labeled with classification labels. In addition to graphic and text warnings, the labels also contain the following information: wavelength, total output power, and laser classification.

The first level laser is a low energy level laser equipment, it is very safe and can avoid all electrostatic hazards, no biological hazards. The following are several application areas for CLASSI lasers: laser printers, CD players, CDROM equipment, geological survey equipment, and experimental analysis equipment. CLASSI laser will not damage the human body or skin under any conditions. When using CLASSI laser equipment, no other auxiliary safety equipment is required.

The second-level laser is also a low-energy laser (power <1 milliwatt), but the laser will damage the human eye. Some applications of ClassII lasers are: laser pointers, sighting devices, and some distance measuring equipment. Avoid looking directly at the CLASSII laser, and do not aim the CLASSII laser at anyone’s eyes. Also, avoid viewing the CLASSII laser with a telescope. In fact, if a CLASSII laser is shot into your eyes, you should immediately turn your head to the side, or close your eyes immediately to prevent laser damage.

(3) Class A laser belongs to strong laser, is a continuous laser wave, belongs to medium energy emission device, light scattering is harmful to human body. For products equipped with ClassIIIa lasers, the harmful distance in open areas is 1000m(3300ft). Different countries have different regulations on the use of laser products. At present, many foreign countries do not allow three-level laser products to be used in cities, and diffuse scattering blocking materials are used to block the laser beam from passing through the restricted area (harmful distance *), and the laser beam must be stopped when someone is active.

The three class B laser laser belongs to the medium power laser. Not only prohibit direct vision, and scattered laser will also cause damage to the human body. Whenever you operate in the laser control area, you must wear isolation clothing and special protective eye protection. Prohibited in areas with human activities.

The four-stage laser is a high-power laser. The following are examples of the use of ClassIV lasers, cutting, welding and fiber machining. ClassIV lasers are very dangerous and can lead to fires.

The harm of laser cutting machine to human body

Eyes

Generally, new contact laser cutting machines like to stare at the cutting head. If you look at the sparks generated by cutting for a long time, it will hurt your eyes and have a tingling feeling. In the process of laser cutting machine, the characteristics of the laser emitted can make the energy highly concentrated in space and time. Through the refractive medium of the eye focused on the retina to form an image, so that the energy density on the retina is higher than the incident energy density on the cornea by 104~105; laser monochromaticity is good, and the chromatic aberration in the fundus is small. Extremely low laser energy can cause damage to the cornea or retina.

Skin

When the laser hits the skin, if its energy (power) is too large, it can cause skin damage. Of course, the damage can be repaired by the tissue. Although the function is reduced, it does not affect the overall functional structure. If it is irradiated for a long time, it may be scalded and left. Scar, although the damage to the eyes is much lighter, it must be taken seriously.

respiratory tract

The high temperature generated by the laser and the gas cooperate to complete various processing. At the same time, it also produces a lot of dust, especially when processing some special metal materials, the smoke produced contains a large number of chemical components, and the dust will be suspended in the air. Harmful to the human body.

Measures to Avoid Damage of Fiber Laser Cutting Machine

(1) Necessary protective equipment for laser cutting machine, wear protective glasses to prevent laser damage to human eyes. Other personnel in the work area should not look directly at the laser during cutting.

⑵ Operators should pay attention to eat more carrots, bean sprouts, tomatoes, lean meat, animal liver and other foods rich in vitamin AC and protein, and often drink some green tea, because these foods can help human beings to better maintain their eyes, so that the human body can better maintain the human body under the condition of laser cutting machine radiation.

⑶ There should be a supporting dust removal device, try to operate in a smooth air environment, and try to wear a mask.

(4) When arranging the cutting site, paint the site and wall of the working environment into a dark color to reduce radiation.

(5) Do not touch the cut parts immediately to avoid residual temperature burns.