forging


forging
/fawr"jing, fohr"-/, n.
1. an act or instance of forging.
2. something forged; a piece of forged work in metal.
[1350-1400; ME; see FORGE1, -ING1]

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In metallurgy, the process of shaping metal and increasing its strength by hammering or pressing.

In most forging an upper die is forced against a heated workpiece positioned on a stationary lower die. To increase the force of the blow, power is sometimes applied to augment gravity. The number of blows struck is carefully gauged by the operator to give maximum effect with minimum wear on the die. Forging presses employ hydraulic or mechanical pressure instead of blows; most can exert only a few hundred tons of pressure, but giant presses, used for forging parts of jet aircraft, are capable of up to 50,000 tons of pressure. See also drop forging.

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      in metallurgy, process of shaping metal and increasing its strength by hammering or pressing. In most forging an upper die is forced against a heated workpiece positioned on a stationary lower die. If the upper die or hammer is dropped, the process is known as drop forging. To increase the force of the blow, power is sometimes applied to augment gravity. The number of blows struck is carefully gauged by the operator to give maximum effect at minimum wear on the die.

      For high-speed work in which the heavy impact of the drop hammer is not needed, an adaptation of the old-fashioned smith's technique, called helve-hammer forging, is used. The striking force is delivered by a wooden helve (handle) operating with the motion of a hand sledge. The helve hammer is usually used for preparatory and finishing operations.

      Forging presses employ hydraulic (hydraulic press) or mechanical pressure instead of the blows of the drop forge. Most forging presses can exert only a few hundred tons of pressure, but giant presses, used for forging parts of jet aircraft, are capable of up to 50,000 tons of pressure.

      Several other forging processes are also used. In roll forging, the metal blank is run through matched rotating rolls with impressions sunk in their surfaces. Impact forging is essentially hammer forging in which both dies are moved horizontally, converging on the workpiece. Counterblow forging is similar, except that the dies converge vertically. A principal advantage of these last two methods is that the two dies mutually absorb energy, eliminating the need for heavy foundations.

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Universalium. 2010.

Look at other dictionaries:

  • Forging — For ging, n. 1. The act of shaping metal by hammering or pressing. [1913 Webster] 2. The act of counterfeiting. [1913 Webster] 3. (Mach.) A piece of forged work in metal; a general name for a piece of hammered iron or steel. [1913 Webster] There… …   The Collaborative International Dictionary of English

  • Forging — Forging. См. Ковка. (Источник: «Металлы и сплавы. Справочник.» Под редакцией Ю.П. Солнцева; НПО Профессионал , НПО Мир и семья ; Санкт Петербург, 2003 г.) …   Словарь металлургических терминов

  • forging — index manufacture, onset (commencement) Burton s Legal Thesaurus. William C. Burton. 2006 …   Law dictionary

  • forging — [fôr′jiŋ] n. 1. something forged; esp., a forged piece of metal 2. the act of one that forges …   English World dictionary

  • Forging — This article is about the metalworking process. For specific hot forging hearth, see forge. For the act of counterfeiting, see forgery. Hot metal ingot being loaded into a hammer forge Forging is a manufacturing process involving the shaping of… …   Wikipedia

  • Forging — Forge Forge, v. t. [imp. & p. p. {Forged}; p. pr. & vb. n. {Forging}.] [F. forger, OF. forgier, fr. L. fabricare, fabricari, to form, frame, fashion, from fabrica. See {Forge}, n., and cf. {Fabricate}.] 1. To form by heating and hammering; to… …   The Collaborative International Dictionary of English

  • forging — noun Date: 14th century 1. the art or process of forging 2. a piece of forged work 3. forgery 3 …   New Collegiate Dictionary

  • forging — a process of working metal to a finished shape by hammering or pressing and is primarily a hot operation. It is applied to the production of shapes either impossible or too costly to make by other methods or needing properties not obtainable by… …   Mechanics glossary

  • forging — n. act of forging, metalworking, work of a blacksmith fÉ”rdÊ’ /fɔːdÊ’ n. smithy, blacksmith s shop; fireplace where metal is heated before being shaped v. strengthen; hammer into shape, fashion by heating and hammering; make, form; invent; copy …   English contemporary dictionary

  • forging — forg•ing [[t]ˈfɔr dʒɪŋ, ˈfoʊr [/t]] n. 1) an act or instance of forging 2) mel something forged; a piece of forged work in metal • Etymology: 1350–1400 …   From formal English to slang


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