Head-mounted welding mask consists of mask shell, headband and accessories, filter washing plate, protection plate and other parts. In addition, it is a special head-mounted welding mask — combined welding mask. The welding mask is connected to the safety helmet to provide head protection while protecting the welder’s eyes and face.The headband of a head-mounted welding mask can be adjusted for comfortable wearing according to head size on a row. The mask can usually be raised and lowered by inches.The head-mounted welding mask is suitable for all kinds of welding operations, especially those which require both hands and high places.Head-mounted welding masks are usually made of heat-resistant nylon.
According to the different working principle of welding mask filter, welding mask can be divided into black glass welding mask and automatic light changing welding mask.The non-window part of the head-mounted welding mask, such as the material, size and weight of the bonnet cover, should conform to GB/T3609.1 standard.Window part such as the use of ordinary black glass filter is required to meet the GB/ T3609.1 standard requirements, automatic variable light filter in accordance with GB/T3609.2 2009 standard implementation.
The filter of traditional black glass welding mask only has a single shading number. With the change of welding process, the filter of different shading number needs to be changed.The welder must remove the welding mask before each welding in order to see the welding object clearly. Frequent movement of the welding mask will accelerate the fatigue of the welder and affect the efficiency of the welding operation.It is easy to be damaged by peripheral arc radiation in the situation where many people are welding at the same time, so that welders are exposed to very high infrared ray, ultraviolet ray and strong light for a short time. For long-term welding operators, their eyes and skin will suffer serious damage.
In addition to the occupational hazards that welders may be exposed to, traditional welding masks can also affect welding quality.On the one hand, in the initial stage of welding, in order to see the welding site clearly, welders usually remove the welding mask to observe the welding site. In order to avoid arc light injury to welders, welding mask will be lowered before arcing to protect their eyes and face. Inevitably, blind welding process will occur, which may reduce the welding efficiency and quality and affect the total product rate., on the other hand, different shading number corresponding to the corresponding uv transmittance, visible light transmittance, infrared transmittance parameters, such as to achieve high visible light, infrared and ultraviolet (uv) radiation blocking rate, you must choose high anti-glare filter, while higher size anti-glare filter will affect the observation, welding quality may be affected.
Due to inevitable factors such as blind welding, in order to ensure welding quality and improve welding efficiency, enterprises usually need to hire welders with rich welding experience, or carry out a lot of training for welders to improve their welding level;At the same time, through training, welders can be guaranteed to minimize the influence of blind welding on welding quality and welding efficiency under the current welding protection equipment conditions, so that enterprises’ investment in welders’ training is bound to increase significantly.
The filters of automatic light changing welding masks usually have multiple shading numbers,the transition time from bright state to dark state, transmission ratio uniformity, Angle dependence, diffuse characteristics and bright state shading number are the important parameters of automatic light changing welding filter. The shading number of automatic light changing welding mask filter is only related to the transmittance of visible light.Automatic variable light filter for ultraviolet and infrared protection using independent barrier piece, the protection level is equivalent to shading 12 or 13, ultraviolet transmission ratio < 2 x 10-4%, near infrared transmission ratio < 2.7 x 10-3%, regardless of whether the control circuit is working in the state, have the same IR/UV barrier ability.With the automatic light changing welding mask, there is no direct exposure of welders to strong ultraviolet, infrared and visible light irradiation.
First of all, the application of automatic light changing welding mask maximizes the welding quality, reduces the welding cost, protects the welder’s eyes and face from the damage of arc radiation, reduces the expenditure required by the welder’s occupational injury, and the welder’s career satisfaction is also greatly increased.With the requirement of higher welding quality and economic benefit, as well as reducing welding-related occupational injury, automatic light changing welding mask has been widely accepted by welders in heavy equipment manufacturing, shipbuilding and other enterprises.Automatic light changing welding mask enables welders to avoid blind welding, improve welding quality and reduce rework or reject rate.
Secondly, during the whole welding process, welders using automatic light changing welding mask do not need to frequently lift and lower the welding mask, and the welding efficiency can be improved by more than 20% in the short-seam positioning welding mode.Increased efficiency means fewer welders can do the same job.Considering that some automatic light changing welding masks also have grinding operation mode, the improvement of operation efficiency will be more obvious.
Air supply welding mask can be divided into electric air supply welding mask and long tube air supply welding mask.On the premise of proper use, air supply welding mask can not only protect welding arc light, but also provide excellent respiratory protection.
Electric Air supply welding mask is composed of high efficiency filter cotton, fan, battery and controller Electric air supply device, breathing tube, welding mask and accessories. The air filtered by high efficiency filter cotton is transmitted to the welding mask by breathing tube for welding.
The long tube pneumatic welding mask usually uses compressed air from the factory as the air source. The particles are filtered through the filter, and the oil and water are separated. Then the pressure is regulated by the voltage regulator, and then the hose and breathing tube are delivered to the welding mask for the welder to breathe.The biggest difference between the long tube air supply welding mask and the electric air supply welding mask is the air source. The electric air supply system filters the ambient air and delivers it to the welder’s breathing area.Long tubular systems use compressed air that can be breathed as a source of air.