A welder (also weldor, which term distinguishes the
tradesmanfrom the equipment used to make welds) is a tradesmanwho specialises in weldingmaterials together. The materials to be joined can be metals (such as steel, aluminum, brass, stainless steeletc.) or varieties of plasticor polymer. Welders typically have to have good dexterityand attention to detail, as well as some technical knowledge about the materials being joined and best practices in the field. [ 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.]
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 equipmentin 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 eyein which ultraviolet lightcauses the inflammation of the corneaand 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 chlorideplastic 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.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.]
Welders are also often exposed to dangerous gases and
particulatematter. Processes like flux-cored arc welding and shielded metal arc welding produce smokecontaining 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 toxicityof the fumes, with smaller particles presenting a greater danger. Additionally, many processes produce fumes and various gases, most commonly carbon dioxideand 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 oxygenin the air and keeping combustible materials away from the workplace.
*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.
Wikimedia Foundation. 2010.
Look at other dictionaries:
Welder — Weld er, n. [1913 Webster] 1. One who welds, or wields. [Obs.] [1913 Webster] 2. A manager; an actual occupant. [Ireland. Obs.] The welder . . . who . . . lives miserably. Swift. [1913 Webster] … The Collaborative International Dictionary of English
Welder — Weld er, n. One who welds, or unites pieces of iron, etc., by welding. [1913 Webster] … The Collaborative International Dictionary of English
welder — UK [ˈweldə(r)] / US [ˈweldər] noun [countable] Word forms welder : singular welder plural welders someone whose job is to weld metal … English dictionary
welder — noun joins pieces of metal by welding them together • Derivationally related forms: ↑weld • Hypernyms: ↑craftsman, ↑artisan, ↑journeyman, ↑artificer • Hyponyms: ↑spot welder, ↑ … Useful english dictionary
welder — [[t]we̱ldə(r)[/t]] welders N COUNT A welder is a person whose job is welding metal … English dictionary
welder — suvirintuvas statusas T sritis automatika atitikmenys: angl. welder vok. Schweißanlage, f; Schweißmaschine, f rus. сварочный станок, m; установка сварки, f pranc. machine à souder, f … Automatikos terminų žodynas
welder — suvirinimo aparatas statusas T sritis automatika atitikmenys: angl. welder; welding apparatus; welding set; welding unit vok. Schweißmaschine, f rus. сварочный аппарат, m pranc. appareil à souder, m; appareil de soudage, m; machine à souder, f;… … Automatikos terminų žodynas
welder — weld ► VERB 1) join together (metal parts) by heating the surfaces to the point of melting and pressing or hammering them together. 2) forge (an article) by such means. 3) cause to combine and form a whole. ► NOUN ▪ a welded joint. DERIVATIVES… … English terms dictionary
welder — noun Date: circa 1828 one that welds: as a. (or weldor) a person whose work is welding b. a machine used in welding … New Collegiate Dictionary
welder — weld·er (wĕlʹdər) n. 1. also wel·dor ( dər) A person who welds, especially as a profession. 2. A device that is used for welding. * * * … Universalium