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Flash welding machine
Jan 14, 2019

The electric welding transformer has its own characteristics, which is characterized by a sharp drop in voltage.

The harm of flash welding machine to human body and its prevention When welding, it will produce an arc of welding that is harmful to the human body. The welding arc mainly includes infrared rays, visible rays and ultraviolet rays. These are all hotline. When the welding arc temperature is 3000 ° C, the radiation wavelength is less than 290 mμm; when the temperature is 3200 ° C, the radiation wavelength is less than 230 mμm. When light radiation acts on the human body, the tissue in the body will absorb, causing tissue heat, photochemistry or ionization, causing acute or chronic damage to the human tissue.

The harm of infrared rays to the human body is mainly caused by the heat of tissues. During the welding process, the eyes are subjected to intense infrared radiation, which immediately feels intense burns and burning, and a flashing illusion occurs. Long-term exposure may cause infrared cataracts, vision loss, and severe blindness.

The luminosity of the visible light is about 10,000 times larger than the normal luminosity of the naked eye. When the visible light radiates the human eye, it will cause pain, and it will not be clear. It is usually called "shaking the eye" and loses its ability to work in a short time. 

The harm of ultraviolet rays to the human body is mainly photochemical action, causing damage to human skin and eyes. After the skin is exposed to strong ultraviolet radiation, it can cause dermatitis, diffuse erythema, sometimes small blisters, exudates, burning sensation, itching; strong symptoms accompanied by systemic symptoms: headache, dizziness, fatigue, nervous excitement, Fever, insomnia, etc. Ultraviolet light illuminates the human eye, causing acute corneal and conjunctivitis, ie electro-optic ophthalmia. Most of them are affected 4-12 days after exposure. The symptoms are high eye shading, tearing, foreign body sensation, tingling, redness and swelling of the eyelids, accompanied by headache and blurred vision.

In order to prevent the harm of welding arc to the human body, the welding work must wear the overalls with smooth surface and large reflection coefficient, wear gloves and shoe covers, and do not allow the welder to roll up the cuffs or short sleeves, open the collar and engage in welding. jobs. After putting on the work pants, make sure that the length is sufficient when you are kneeling, to avoid exposure to the ankles and to be burned by the arc. A mask with a special filter lens must be used. The filter lens must be a qualified product produced by a national designated factory. Do not use a general ink mirror. In order to protect the eyes of other workers in the welding area from damage, a barrier should be placed at the welding site. In the area of the barrier, the welder should always remind other staff to avoid the situation. The qualified unit can give other work to the welding area. Personnel are equipped with protective glasses to avoid arcing and eye damage.

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