Welding mask describes the working principle

2018/1/18 14:01:45

Global data show that a new generation of welding protection equipment, such as automatic dimming masks and welding respirators, not only provides welding operators with comprehensive high-quality protection from the perspective of environmental protection, but also enhances the welding skill and manufacture in an all-round way The performance and brand of the enterprise.

The traditional mask with a fixed number of shading glass, to a certain extent, bound the potential of the welding operator to play. For example, if the welding current is 160A, workers are often faced with the oppression of choosing to observe the darkness. If you choose a darkness opaque glass size 10, the operator may feel that the window is too bright. If opting for opaque glass number 11, Feel the dark window. So in the welding process, if it is the welding quality requirements of Class 1,2 welds, the operator often choose a smaller darkness on the 10th glass, in order to ensure a clear observation of the molten pool, so inevitably form pairs Retinal damage and visual fatigue of the nerves and eventually lead to poor weld formation and weld defects; less demanding 3 types of welds, the operator often choose darker opacity lenses to protect the eyesight Less damage, but also inevitably formed a high incidence of welding defects and so on

Welding mask works:

The working principle of the automatic dimming welding mask is to use the special optoelectronic properties of the liquid crystal, that is, the liquid crystal molecules will rotate after voltage is applied at both ends of the liquid crystal so as to change the light passing rate by controlling the voltage applied to the liquid crystal panel , To achieve the effect of adjusting the number of shades, played the purpose of welding protection. However, when there is no arc, the visible light can pass through the liquid crystal as much as possible. The welder can see the welding workpiece with it and rapidly darken the moment of striking. This effectively protects the welder's eyes from harmful rays and strong Light exposure.

Automatic dimming welding mask working process:

According to the welding method and the welding current, adjust the shading knob to select the appropriate shading number; adjust the mask headband and the viewing angle of the window to make it feel comfortable and can see the welding object instantly; when the welding arc starts, the arc signal detection circuit After the arc signal is detected, it instantly darkens and the arc signal disappears. The window immediately returns to the normal state and the welding object can be directly viewed.