Why are welding helmet chosen for welding? Welding is considered to be an important part in construction and in metal fabrication. It is a method of heating the metal and joining it with other piece of metal. Welding is mostly used in automobile, metal fabrication, aerospace, underwater and at home. But there are certain things which should be given more importance than welding like safety. Welding is an unsafe process which includes variety of sources like gas flame, ultra rays, electric beam and many more. This source can affect your body if you are not protected against it. So protect your self by wearing safety equipments like welding helmet, gloves and boots.
Welding Helmet: This is mainly for protecting your face against harmful gases and lights. These also protect you from breathing harmful fumes which comes out while welding. Your face and eyes can become an easy target while welding. You will find many varieties of helmets but a good quality helmet is when there are certain components present in it such as: •
Shell : This should have an eye piece than can resist against heat, electricity and impact. The eye piece should be opaque so while welding the light will automatically dim by it.
Retainer lens : The work of this lens is to stop the pieces from getting into your eyes which comes out while welding. These are generally made out of plastic that’s because the pieces can break the glass.
Filter Lens : The welding helmet consist of filter lens which should be made out of glass. These filter controls the light which can affect the eyes. Each filter has different property and they are seen in more than 10 shades. If the filter lens has more number of shades then the amount of light passed through will be less.
Gasket : This is made from heat resisting material which insulates the heat of welding . This generally placed in between the filter lens and cover lens. The gasket is mainly for protecting the welder from heat changes like high voltage. If this isn’t place between the cover and filter lens then there is a possibility of damaging the filter lens.
Outer cover lens : The outer cover lens of welding helmet is for preventing you from scratches and UV (ultra violet) rays. If an outer cover plate is made out of polycarbonate plastic then it will surely protect your face from UV rays.
Apart from these you will also find auto darkening helmets which are very good protection while welding. The advantage of this helmet is you don’t have to change the lens for darkening during welding. This helmet is dark when you haven’t started welding and again darkens when you stop welding. There are some helmets where you need to take out helmet for changing the lens. Source: http://www.everlastgenerators.com