Views: 22 Author: DURMAPRESS Publish Time: 2021-10-26 Origin: DURMAPRESS
People with basic knowledge know that laser is harmful to the human body, but often due to the cognitive weakness of the operator, and ignore the necessary protection of their own, the following is a brief introduction:
International classification of lasers
This classification is the international standard classification, which has been adopted by the scientific community of the world, consistent classification. This is convenient for cnc fiber laser cutting machine safety level unification and national trade. Classification is divided into: level 1, level 2, level 3, level 4, totally divided into 4 levels. The higher the classification, the greater the danger. Laser grade requirements must be marked in Roman numerals on the laser system, all regular laser products are generally labeled with classification labels, labels in addition to graphic and text warnings, but also contain the following information: wavelength, total output power, laser classification.
(1) Level 1 laser belongs to low energy laser equipment, it is very safe and can avoid all electrostatic danger, no biological hazard. Here are some applications of CLASSI laser: laser printers, CD players, CDROM equipment, geological survey equipment and experimental analysis equipment. CLASSI laser does not cause damage to human body or skin under any conditions. When using CLASSI laser equipment, no other auxiliary safety equipment is required fiber laser cutting machine.
The second laser is also a low energy level laser (power milliwatt), but this laser can damage the human eye. Some examples of ClassII laser applications: laser designators, aiming devices, and range measuring devices. Avoid looking directly at the CLASSII laser and do not aim the CLASSII laser at anyone. In addition, viewing the CLASSII laser through binoculars should be avoided. In fact, if you get a CLASSII laser in your eye, you should turn your head away or close your eyes immediately to prevent laser damage.
⑶ Three class A laser belongs to the strong laser, is A continuous laser wave, belongs to the medium energy emitting device, the scattering of light is harmful to the human body. With ClassIIIa laser products, open area harmful distance is 1000m(3300ft). Different countries have different regulations on the use of laser products. At present, many foreign countries do not allow three laser products to be used in the city, and diffuse scattering blocking material is used to block the laser beam through the restricted area (harmful distance *), and the laser beam must be suspended when someone is active.
(4) Class B laser laser belongs to the medium power laser. Not only is it forbidden to look directly, but the scattered laser light can also cause damage to the human body. Whenever operating in the laser controlled area, it is necessary to wear an isolation suit and a special protective eye mask. Do not use in areas where there is human activity.
The four-stage laser belongs to the high power laser. Below are examples of the use of ClassIV laser, cutting, welding to mechanical fiber processing. ClassIV lasers are very dangerous and can cause fires.
Laser cutting machine injury to human body
General new contact laser cutting machine, like to stare at the cutting head, if a long time to see the spark generated by cutting, there is harm to the eyes, there is a tingling sensation. In the processing process, the characteristics of the laser emitted can make the energy in space and time highly concentrated. The energy density on the retina is 104~105 higher than that on the cornea. Laser monochromaticity is good, in the fundus color difference is small. Cause very low laser energy irradiation can cause cornea or retina damage.
Laser light to the skin, such as its energy (power) too large can cause skin damage, of course, the damage can be repaired by the tissue, although the function has declined, but does not affect the overall functional structure, if a long time irradiation may burn and scar, although the eye damage is much lighter, but must also cause high attention.
High temperature produced by laser and gas, complete a variety of processing, at the same time also produce a lot of dust, especially in the processing of some special metal materials, the smoke contains a lot of chemical composition, dust will be suspended in the air, harmful to the human body after inhalation.
Measures to avoid fiber laser cutting machine injury
The necessary laser cutting machine protective equipment, wear protective goggles to prevent laser damage to the human eye. Other personnel in the work area should not look directly at the laser during cutting.
The operator should pay attention to eat more carrots, bean sprouts, tomatoes, lean meat, animal liver and other foods rich in vitamin AC and protein, often drink some green tea, because these foods can help human better maintenance of eyes, so that the human body can be in laser cutting machine radiation conditions, better maintenance of the human body.
(3) There should be a supporting dust removal device, try to operate in a smooth air environment, try to wear masks.
(4) In the layout of the cutting site, the working environment of the site and wall paint dark to reduce radiation.
Don't touch the cut parts immediately, so as not to burn.