Components and functions of an auto-darkening welding helmet
Bouyean2025-09-23
An auto-darkening welding helmet mainly consists of an auto-darkening filter (ADF), outer protective lens, shade adjustment switch, sensitivity adjustment switch, delay adjustment switch, power switch, and helmet shell. Some welding helmets also feature additional functional switches like a pivot adjustment knob, grinding mode selection switch, and sensor cover. The working principle of an auto-darkening welding helmet is based on using a liquid crystal as the shading lens. Sensors on the lens detect the initiation and cessation of the welding arc, and electricity drives the liquid crystal to change its shading level, thereby achieving protection against harmful light. Below is a detailed introduction to the components and functions of an auto-darkening welding helmet.
1. Auto-Darkening Filter (ADF)
When the welding arc is struck, it instantly triggers the liquid crystals to darken. Ultraviolet and infrared rays are reflected away, while an appropriate amount of visible light is transmitted to the eyes, reducing light transmission to a suitable level.
2. Outer Protective Lens
Made from lightweight, durable, high-strength nylon material, it is stain-resistant and abrasion-resistant. It protects the ADF from damage caused by spatter and sparks, extending the service life of the auto-darkening welding helmet.
3. Shade Adjustment Switch
A lower shade number means better lens light transmission, making it easier to see the welding position. A higher shade number means poorer light transmission, making it harder to see the welding position.
The ADF can filter out most harmful ultraviolet and infrared radiation. During welding, a shade level should be selected that allows clear visibility of the arc starting point and provides the most comfort.
4. Pivot Adjustment Knob
The pivot adjustment knob allows for adjusting the ADF to the optimal position relative to the eyes, setting the best viewing angle to ensure the welder obtains the optimal field of vision after wearing the helmet.
5. Power Switch
This is the helmet's power switch. Designs vary by brand; some require manually switching the power on before use, while others feature automatic power-on/off.
6. Helmet Shell
The shell is made from polyimide material, which is lightweight and durable. The material used has heat-resistant properties, protecting the operator from heat radiation and preventing injuries from welding sparks and spatter to the face.
The auto-darkening welding helmet is an important piece of personal protective equipment for welding. It provides dual filtration, avoiding harmful radiation from ultraviolet and infrared rays generated by the arc, as well as protecting the eyes from intense welding light, thereby preventing the occurrence of arc eye (photokeratitis).
1. Auto-Darkening Filter (ADF)
When the welding arc is struck, it instantly triggers the liquid crystals to darken. Ultraviolet and infrared rays are reflected away, while an appropriate amount of visible light is transmitted to the eyes, reducing light transmission to a suitable level.
2. Outer Protective Lens
Made from lightweight, durable, high-strength nylon material, it is stain-resistant and abrasion-resistant. It protects the ADF from damage caused by spatter and sparks, extending the service life of the auto-darkening welding helmet.
3. Shade Adjustment Switch
A lower shade number means better lens light transmission, making it easier to see the welding position. A higher shade number means poorer light transmission, making it harder to see the welding position.
The ADF can filter out most harmful ultraviolet and infrared radiation. During welding, a shade level should be selected that allows clear visibility of the arc starting point and provides the most comfort.
4. Pivot Adjustment Knob
The pivot adjustment knob allows for adjusting the ADF to the optimal position relative to the eyes, setting the best viewing angle to ensure the welder obtains the optimal field of vision after wearing the helmet.
5. Power Switch
This is the helmet's power switch. Designs vary by brand; some require manually switching the power on before use, while others feature automatic power-on/off.
6. Helmet Shell
The shell is made from polyimide material, which is lightweight and durable. The material used has heat-resistant properties, protecting the operator from heat radiation and preventing injuries from welding sparks and spatter to the face.
The auto-darkening welding helmet is an important piece of personal protective equipment for welding. It provides dual filtration, avoiding harmful radiation from ultraviolet and infrared rays generated by the arc, as well as protecting the eyes from intense welding light, thereby preventing the occurrence of arc eye (photokeratitis).
