In the laser cutting machine industry, the operator's awareness of the laser cutting machine is weak, and the harm of the operator and the commissioning personnel is ignored. Here is a brief introduction:
International Classification of laser
This classification is an international standard classification, which has been recognized and consistent by the scientific community all over the world. This is convenient for the unification of the safety level of laser equipment and national trade. The classification is divided into four levels: Level I, level II, level III and level IV. The higher the classification level, the greater the risk. The laser grade regulations must be marked on the laser system with Roman numerals. 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.
⑴ class I < classi > laser belongs to low-energy laser equipment, which is very safe and can avoid all electrostatic hazards without biological hazards. The following are several application fields of classi laser: laser printer, CD player, CDROM equipment, geological survey equipment and experimental analysis equipment. No matter under any conditions, classi laser will not cause damage to human body or skin. When using classi laser equipment, no other auxiliary safety equipment is required.
⑵ class II < ClassII > laser is also a low-energy laser (power < 1MW), but it will damage people's eyes. Some applications of ClassII laser include laser pointer, aiming device and some distance measuring equipment. Avoid looking directly at the ClassII laser, and do not aim the ClassII laser at anyone's eyes. In addition, avoid viewing ClassII laser with telescope. In fact, if a ClassII laser enters your eyes, you should immediately turn your head to one side or close your eyes to prevent laser damage.
⑶ class III class a laser < classiiia > is a strong laser, a continuous laser wave, and a medium energy emitting device. Light scattering is harmful to human body. For products equipped with classiiia laser, 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 class III laser products to be used in cities, and scattering blocking materials should be paved to block the laser beam from passing through the restricted area (harmful distance *), and the laser beam must be stopped when there are people moving.
⑷ class III class B laser < classiiib > laser belongs to medium power laser. It is not only forbidden to look directly, but also the scattered laser will cause damage to the human body. Whenever you operate in the laser control area, you must wear isolation clothes and special protective goggles. It is forbidden to use in areas with human activities.
Class IV < classiv > lasers are high-power lasers. The following is an example of the use of classiv laser, cutting, welding and fiber machining. Classiv laser is very dangerous and may cause fire.
Harm of laser cutting machine to human body
Eye
Generally, people who are new to the laser cutting machine like to stare at the cutting head. If they look at the sparks generated by cutting for a long time, they will hurt their eyes and have a tingling feeling. In the process of processing, the characteristics of the laser emitted by the laser cutting machine can make the energy highly concentrated in space and time. Focusing the refractive medium of the eye on the retina to form an image so that the energy density on the retina is 104-105 higher than the incident energy density on the cornea; The laser has good monochromaticity and small color difference in the fundus. So that extremely low laser energy irradiation can cause damage to the cornea or retina of the eye.
skin
When the laser irradiates the skin, if the energy (power) is too large, it can cause skin damage. Of course, the damage can be repaired by the tissue. Although the function has decreased, it does not affect the overall functional structure. If the laser irradiates for a long time, it may burn and leave scars. Although the damage to the eyes is much lighter, it should also be paid attention to.
respiratory tract
The high temperature generated by the laser works with the gas to complete various processing, and at the same time, it also produces a large amount of dust. Especially when processing some special metal materials, the smoke generated contains a large amount of chemical components. The dust will be suspended in the air and harmful to human body after inhalation.
Measures to avoid injury of fiber laser cutting machine
⑴ necessary protective equipment for laser cutting machine, and 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 eating more carrots, bean sprouts, tomatoes, lean meat, animal liver and other foods rich in vitamin AC and protein as appropriate, and often drinking green tea, because these foods can help humans better maintain their eyes, so that the human body can better maintain the human body under the radiation of the laser cutting machine.
⑶ there should be matching dust removal devices, and try to operate in an environment with unobstructed air and wear masks.
⑷ when arranging the cutting site, paint the site and wall of the working environment dark to reduce radiation.
(5) don't touch the cut parts immediately to avoid scalding by residual temperature.