Ac Mig Welder

[Kim Veller]

A welder is a person or equipment that fuses materials together. The term welder refers to the operator, the machine is referred to as the welding power supply. The materials to be joined can be metals (such as steel, aluminum, brass, stainless steel etc.) or varieties of plastic or polymer. Welders typically have to have good dexterity and attention to detail, as well as technical knowledge about the materials being joined and best practices in the field.[1][2]

Welding, without the proper precautions appropriate for the process, can be a dangerous and unhealthy practice. However, with the use of new technology and proper protection, the risks of injury and death associated with welding can be greatly reduced. Because many common welding procedures involve an open electric arc or a flame, the risk of burns is significant. To prevent them, welders wear personal protective equipment in the form of heavy leather gloves and protective long sleeve jackets to avoid exposure to extreme heat and flames. Additionally, the brightness of the weld area leads to a condition called arc eye in which ultraviolet light causes the inflammation of the cornea and can burn the retinas of the eyes. Full face welding helmets with dark face plates are worn to prevent this exposure, and in recent years, new helmet models have been produced that feature a faceplate that self-darkens upon exposure to high amounts of UV light. To protect bystanders, opaque welding curtains often surround the welding area. These curtains, made of a polyvinyl chloride plastic film, shield nearby workers from exposure to the UV light from the electric arc, but should not be used to replace the filter glass used in helmets.[3][4]

Welders are also often exposed to dangerous gases and particulate matter. Processes like flux-cored arc welding and shielded metal arc welding produce smoke containing particles of various types of oxides, which in some cases can lead to medical conditions like metal fume fever. The size of the particles in question tends to influence the toxicity of the fumes, with smaller particles presenting a greater danger. Additionally, many processes produce fumes and various gases, most commonly carbon dioxide and ozone, that can prove dangerous if ventilation is inadequate. Furthermore, because the use of compressed gases and flames in many welding processes pose an explosion and fire risk, some common precautions include limiting the amount of oxygen in the air and keeping combustible materials away from the workplace.[3] Welders with expertise in welding pressurized vessels, including submarine hulls, industrial boilers, and power plant heat exchangers and boilers, are generally referred to as boilermakers.[5]

A lot of welders relate to getting small electrical shocks from their equipment. Occasionally, welders might work in damp crowded environments and they consider it to be a "part of the job." Welders can be shocked by faulty conditions in the welding circuit, or, from the work lead clamp, a grounded power tool that is on the bench (the workpiece or the electrode). All of these types of shocks come from the welding electrode terminal. Often these shocks are minor and are misdiagnosed as being an issue with a power tool or the power supply to the welder's area. However, the more likely cause is from stray welding current which occurs when current from the welding cables leaks into the welder's work area. Often this is not a serious problem, however, under the right circumstances, this can be fatal to the welder or anyone else inside the work area. When a welder feels a shock, they should take a minute to inspect the welding cables and ensure that they are clean and dry, and, that there are no cracks or gouges out of the rubber casing around the wire. These precautions may be life-saving to the welders.[6]

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Welders, cutters, solderers, and brazers may work outdoors in all types of weather, or they may work indoors, sometimes in a confined area. Most work full time, and some work more than 40 hours per week.

Despite limited employment growth, about 42,600 openings for welders, cutters, solderers, and brazers are projected each year, on average, over the decade. Most of those openings are expected to result from the need to replace workers who transfer to different occupations or exit the labor force, such as to retire.

Welders, cutters, solderers, and brazers use welding torches and other equipment to apply heat to metal pieces, melting and fusing them to form a permanent bond. Some workers specialize in welding; others perform all disciplines or a combination of them.

Welders join metals using a variety of techniques and processes. For example, in arc welding they use machinery that produces electrical currents to create heat and bond metals together. Welders usually choose a welding process based on a number of factors, such as the types of metals being joined.

Cutters use heat from an electric arc, a stream of ionized gas called plasma, or burning gases to cut and trim metal objects to specific dimensions. They also dismantle large objects, such as ships, railroad cars, and buildings.

Solderers and brazers use equipment to heat molten metal and join two or more metal objects. Soldering and brazing are similar, except that the temperature used to melt the filler metal is lower in soldering. Solderers commonly work with small pieces that must be positioned precisely, such as to make computer chips. Brazers connect dissimilar metals through the application of a filler material, which creates strong joints in products created with multiple metals; they also may apply coatings to parts in order to reduce wear and protect against corrosion.

Welders and cutters may work outdoors in all types of weather, or indoors, sometimes in a confined area designed to contain sparks and glare. They may work on a scaffold or platform high off the ground.

Welders, cutters, solderers, and brazers risk injury on the job. They may be exposed to a number of hazards, including fumes, very hot materials, and intense light created by the arc. Workers avoid injuries by following safety procedures and using personal protective equipment, such as welding helmets, hearing protection, and heat-resistant gloves.

Most welders, cutters, solderers, and brazers work full time, and some work more than 40 hours per week. Many manufacturing firms have two or three 8- to 12-hour shifts each day, allowing the firm to continue production around the clock if needed. As a result, welders, cutters, solderers, and brazers may work evenings and weekends.

Although some employers hire inexperienced entry-level workers and train them on the job, many prefer to hire workers who have completed training or credentialing programs. Entry-level workers with formal technical training still receive several months of on-the-job training.

The American Society of Mechanical Engineers (ASME) offers certification in practical welding technology for workers seeking to enhance core competencies, and the Institute for Printed Circuits offers certification and training in soldering.

Detail oriented. Welders, cutters, solderers, and brazers perform precision work, often with straight edges. The ability to see characteristics of the joint and detect changes in molten metal flows requires attention to detail.

The Occupational Employment and Wage Statistics (OEWS) program produces employment and wage estimates annually for over 800 occupations. These estimates are available for the nation as a whole, for individual states, and for metropolitan and nonmetropolitan areas. The link(s) below go to OEWS data maps for employment and wages by state and area.

CareerOneStop includes hundreds of occupational profiles with data available by state and metro area. There are links in the left-hand side menu to compare occupational employment by state and occupational wages by local area or metro area. There is also a salary info tool to search for wages by zip code.

The What They Do tab describes the typical duties and responsibilities of workers in the occupation, including what tools and equipment they use and how closely they are supervised. This tab also covers different types of occupational specialties.

The Work Environment tab includes the number of jobs held in the occupation and describes the workplace, the level of physical activity expected, and typical hours worked. It may also discuss the major industries that employed the occupation. This tab may also describe opportunities for part-time work, the amount and type of travel required, any safety equipment that is used, and the risk of injury that workers may face.

The How to Become One tab describes how to prepare for a job in the occupation. This tab can include information on education, training, work experience, licensing and certification, and important qualities that are required or helpful for entering or working in the occupation.

The State and Area Data tab provides links to state and area occupational data from the Occupational Employment and Wage Statistics (OEWS) program, state projections data from Projections Central, and occupational information from the Department of Labor's CareerOneStop.

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