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Welder making boilers for a ship, Combustion Engineering Company. Chattanooga, Tennessee, June 1942.
A welder (also weldor, which term distinguishes the tradesman from the equipment used to make welds) is a tradesman who specialises in welding materials together. 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 some technical knowledge about the materials being joined and best practices in the field.
Contents
1 Safety issues
2 External links
3 References
4 Further reading
//
Safety issues
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 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. Goggles and 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 face plate 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.
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.
External links
References
^ Lincoln Electric (1994). The Procedure Handbook of Arc Welding. Cleveland: Lincoln Electric. ISBN 99949-25-82-2.
^ Weman, Klas (2003). Welding processes handbook. New York: CRC Press LLC. ISBN 0-8493-1773-8.
^ a b Cary, Howard B. and Scott C. Helzer (2005). Modern Welding Technology. Upper Saddle River, New Jersey: Pearson Education. ISBN 0-13-113029-3.
^ Blunt, Jane and Nigel C. Balchin (2002). Health and Safety in Welding and Allied Processes. Cambridge: Woodhead. ISBN 1-85573-538-5.
Further reading
ASM International (2003). Trends in Welding Research. Materials Park, Ohio: ASM International. ISBN 0-87170-780-2
Hicks, John (1999). Welded Joint Design. New York: Industrial Press. ISBN 0-8311-3130-6.
Kalpakjian, Serope and Steven R. Schmid (2001). Manufacturing Engineering and Technology. Prentice Hall. ISBN 0-201-36131-0.
v?d?e Metalworking - Welding
Arc welding
Atomic hydrogen Gas metal (MIG/MAG) Flux-cored Gas tungsten (TIG) Plasma Shielded metal (MMA) Submerged arc
Other processes
Electrogas Electron beam Electroslag Forge Friction Friction stir Friction stud Laser beam Laser-hybrid Oxyfuel Resistance Spot Ultrasonic
Equipment
Power supply Electrode Filler metal Shielding gas Robot Helmet
Related features
Heat-affected zone Weldability Residual stress Arc eye
Related areas
Brazing Soldering Fabrication Casting Machining Metallurgy Jewelry
Metalworking topics
Casting CNC Cutting tools Drilling and threading Fabrication Forging Grinding Jewellery Lathe Machining Machine tools and associated tooling Measuring Metalworking Hand tools Metallurgy Milling NC Occupations Press tools Pipe and tube bending Smithing Turning General terminology Welding
Categories: Welding | Production occupations | Construction trades workers | Metalworking occupations(and so on)
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