What does welding arc radiation mainly include?
The arc also radiates heat radially outwardly. Infrared radiation is dangerous without wearing the right overalls and goggles. In order to reduce the optical radiation, to protect the surrounding staff are not arc interference, welding area should be set around the baffle. Welders should try to avoid making the arc radiation to other staff around. The area around the baffle and the weld zone, especially the welded septum walls and floors, are painted with an ultraviolet topcoat, and the shades do not produce excessive contrast, and the floor finish used should have a low UV reflectivity. It is recommended to use a soft color of zinc oxide or titanium oxide paint. Do not use black or shiny paint.
Arc is very strong light source, both visible and ultraviolet and infrared. Other workers working around welders and welding arcs should wear appropriate anti-arc radiation devices. The brightness and spectrum of the welding arc depends on the welding method, the metal vapor in the arc, the arc atmosphere, the length of the arc, and the size of the welding current. The greater the welding current or arc voltage, the stronger the arc. As with any other optical radiation, the intensity of the arc radiation decreases rapidly as the distance increases, and the decrease is proportional to the square of the distance. Smoke generation site Large arc welding method arc is weak, because the smoke plays the role of filtering. The spectrum of the welding arc is similar to that of the sun, and the consequences of excessive exposure to the eye and the skin are the same as the excessive exposure to the sun. If the tungsten is used for soldering during tungsten arc welding, the radiation is very weak.
General arc welding arc temperature can be as high as 5000K or more, will produce a strong arc radiation. Welding arc radiation mainly includes: visible radiation, infrared and ultraviolet light radiation. The light source wave range between 102 ~ 106A. The size of the general arc welding radiation is related to a variety of factors such as the metal vapor in the arc, the length of the arc, and the size of the welding current. When the welding current or arc voltage is greater, the stronger the welding arc, the greater the arc radiation. Welding arc radiation and other radiation sources, the ray intensity will increase with the distance gradually decreases, the decline is proportional to the square of the distance. Its harm is as follows:
For example, arc radiation produces far more intensity than the human eye can bear. Visible light, with ultraviolet and infrared. When the arc radiation for a long time to the human body, may be absorbed by the body tissue caused by the body tissue heat, photochemical and ionization, resulting in acute or chronic injury to human tissue, especially in ultraviolet and infrared damage the most serious, and this The species is reproducible.
(1) UV rays can cause damage to the skin and eyes. UV damage to the eyes is caused by electro-optical ophthalmia. (2 Infrared rays cause the body tissue to cause heat, and the eyes are exposed to infrared radiation, which can cause burns and burning quickly, forming a sense of flashing sensation, and the effect of argon arc welding is greater than that of hand arc welding. Strengthen the various security protection, in order to "welding arc radiation" damage to a minimum.
