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Welding is a fabrication process that joins materials, usually metals or thermoplastics, by using high heat to melt the parts together and allowing them to cool, causing fusion. Welding is distinct from lower temperature metal-joining techniques such as brazing and soldering, which do not melt the base metal.
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Many different energy sources can be used for welding, including a gas flame (chemical), an electric arc (electrical), a laser, an electron beam, friction, and ultrasound. While often an industrial process, welding may be performed in many different environments, including in open air, under water, and in outer space.
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Welding is a hazardous undertaking and precautions are required to avoid burns, electric shock, vision damage, inhalation of poisonous gases and fumes, and exposure to intense ultraviolet radiation
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Until the end of the 19th century, the only welding process was forge welding, which blacksmiths had used for millennia to join iron and steel by heating and hammering. Arc welding and oxy-fuel welding were among the first processes to develop late in the century, and electric resistance welding followed soon after. Welding technology advanced quickly during the early 20th century as world wars drove the demand for reliable and inexpensive joining methods. Following the wars, several modern welding techniques were developed, including manual methods like shielded metal arc welding, now one of the most popular welding methods
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- MANUFACTURING
- FABRICATION
- WELDING AND CUTTING
automatic and automatic processes such as gas metal arc welding, submerged arc welding, flux-cored arc welding and electroslag welding. Developments continued with the invention of laser beam welding, electron beam welding, magnetic pulse welding, and friction stir welding in the latter half of the century. Today, as the science continues to advance, robot welding is commonplace in industrial settings, and researchers continue to develop new welding methods and gain greater understanding of weld quality
By HetmayarWe're a comprehensive supplier of welding products, contributing to the welding needs of numerous industries. We manufacture welding robots, power sources and equipment, which are packaged with welding consumables into original welding systems.
The term "weld" is of English origin, with roots from Scandinavia. It is often confused with the Old English word, weald, meaning "a forested area", but this word eventually morphed into the modern version, "wild". The Old English word for welding iron was samod (to bring together) or samodwellung (to bring together hot, with "hot" more relating to red-hot or a swelling rage; in contrast to samodfæst, "to bind together with rope or fasteners"). The term "weld" is derived from the Middle English verb "well" (wæll; plural/present tense: wælle) or "welling" (wællen), meaning: "to heat" (to the maximum temperature possible); "to bring to a boil". The modern word was likely derived from the past-tense participle, "welled"
The word is derived from the Old Swedish word valla, meaning "to boil". Sweden was a large exporter of iron during the Middle Ages, and many other European languages used different words but with the same meaning to refer to welding iron, such as the Illyrian (Greek) variti (to boil), Turkish kaynamak (to boil), Grison (Swiss) bulgir (to boil), or the Lettish (Latvian) sawdrit (to weld or solder, derived from wdrit, to boil). In Swedish, however, the word only referred to joining metals when combined with the word for iron (järn), as in valla järn (literally: to boil iron). The word
Robert John
January 13 2021The history of joining metals goes back several millennia. The earliest examples of this come from the Bronze and Iron Ages in Europe and the Middle East. The ancient Greek historian Herodotus states in The Histories of the 5th century BC that Glaucus of Chios "was the man who single-handedly invented iron welding
ReplyChristine Hill
December 27 2021Resistance welding was also developed during the final decades of the 19th century, with the first patents going to Elihu Thomson in 1885, who produced further advances over the next 15 years. Thermite welding was invented in 1893, and around that time another process, oxyfuel welding, became well established. Acetylene was discovered in 1836 by Edmund Davy, but its use was not practical in welding until about 1900, when a suitable torch was developed
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