- July 28, 2015
Welding helmet technologies offer benefits for productivity, operator safety
Helmets are a critical part of operator safety and protection in welding and grinding applications, but not all welding helmets are created equal.
There are a number of options to consider when selecting a helmet for a specific application or environment. Many types of helmets offer varying technologies and solutions that not only play a role in welding operator safety, but also impact productivity and comfort.
To select the right level of protection and product for the job, welding operators should consider the following: the amount and type of welding that is done; the need to perform alternate applications such as plasma cutting or grinding; whether out-of-position applications are required; and if welding will be done indoors or outdoors.
Helmet technology advancements
Welding helmets are available in two main categories: passive and auto-darkening. Passive helmets have a dark lens that does not change or adjust, and welding operators nod the helmet down as they start the arc when using this type of helmet.
Auto-darkening helmets offer greater ease of use and convenience, especially for operators who raise and lower their helmet frequently, since sensors will automatically darken the lens once they detect the arc.
In the category of auto-darkening helmets, there are fixed shade or variable shade options. A fixed shade helmet will darken to one pre-set shade—often a good option in applications where the welding operator repeats the same weld. With a variable shade helmet, the lens has different shades that the operator can select, which is beneficial when welding processes and applications vary. Adjustments to the lens shade–often via a digital keypad–are based upon the brightness of the arc.
Auto-darkening helmets also offer different operational modes, which adjust the lens shade for grinding or plasma cutting, for example. These modes increase flexibility, allowing a single helmet to be used for numerous jobs and applications.
Welding helmets on the market today offer technology and conveniences that can help improve productivity and welding operator comfort and safety. These include features like tracking functions, improved headgear and more. Following are some of the recent advancements in welding helmet technology.
New technology is available on the market that allows the helmet lens to track arc-on time while the operator is welding. By gathering this information, the weld operator and company can determine how much time is spent welding over a given period of time. This information can be used to calculate efficiency and productivity, and to identify training opportunities, if necessary.
Typically, this helmet technology also includes a digital clock display and offers the operator the ability to set an alarm or timer to keep track of daily activities, or to receive alerts about breaks, meetings or shift end times.
Electromagnetic arc sensing
One available helmet technology that can help improve productivity is electromagnetic arc sensing. This option can be especially beneficial for outdoor welding or in applications where the welding operator has an obstructed view.
On helmets without this technology, the position of the welding operator’s head or an obstruction can block the sensors on the lens, preventing the lens from darkening. Bright sunlight during outdoor welding applications can also cause the lens to darken before the operator is ready.
With electromagnetic arc sensing, the sensor picks up the magnetic frequency of the welding arc to eliminate any interference issues. The lens will darken only during welding and stays dark throughout the process–even in bright sunlight or when there are obstacles between the sensor and the arc. This reduces operator downtime for helmet adjustments or repositioning of the work piece.
Enhanced grinding options
For many welding operators, grinding is a time-consuming, but necessary, part of the welding process. Some newer helmets offer a grind mode, which is a good option when the grinding is mostly post-weld cleanup work. With an external grind control option, the push of a button or flip of a switch puts the helmet into grind mode and adjusts the lens, which helps improve productivity and safety since there is no need for the operator to remove the helmet to make adjustments.
Some helmets provide the ability to flip up the auto-darkening lens while keeping the rest of the shield down. This opens up a clear grinding shield beneath the auto-darkening lens to provide the operator a clear view of the work surface for critical grinding applications and setup work. It should be noted that safety glasses are still required underneath helmets with clear grind shields. If using a welding helmet for grinding, be sure to look for the ANSI Z87.1+ marking, as the “+” indicates that the helmet is certified to protect against high impact.
There is a push across the industry to improve welding operator comfort and productivity while still maintaining safety. Many welding operators wear a helmet five or six hours a day–or more–making helmet weight and design important considerations.
Some helmet options offer pivoting headgear with dual top straps to help spread the weight across the operator’s head and cushioned headband pads. The main goal of many of these solutions is to reduce and better distribute the helmet weight to help alleviate strain and discomfort for the weld operator. Keep in mind that most of the weight of a helmet comes from glass in the auto-darkening lens, so typically the larger the lens, the heavier the helmet will be.
Elevating productivity and safety
There are many welding helmet options on the market, so consider the application and welding, grinding or cutting requirements when making the selection. Available sensors, modes and features on many welding helmets can offer greater ease of use, flexibility and easy adjustment–factors that can help improve productivity and operator comfort. SMT
By Eric Sommers is product manager, weld safety-head and face protection, Miller Electric Mfg. Co.