Electron beam machining

Electron beam machining

Electron-Beam Machining (EBM) is a machining process where high-velocity electrons are directed toward a work piece, creating heat and vaporizing the material. Applications of this process are annealing, metal removal, and welding (see Electron Beam Welding). EBM can be used for very accurate cutting of a wide variety of metals. Surface finish is better and kerf width is narrower than those for other thermal cutting processes.

Process

EBM machines utilize voltages in the range of 50 to 200 kV to accelerate electrons to 200,000 km/sec. Electomagnetic lenses are used to direct the electron beam, by means of deflection, into a vacuum. The electrons strike the top layer of the work piece, removing material, and then become trapped in some layer beneath the surface. The process is similar to laser-beam machining, but because EBM requires a vacuum, it is not used as frequently as laser-beam machining.

Considerations

Vacuums must be used to reduce contamination, and minimize electron collisions with air molecules. Because work must be done in a vacuum, EBM is best suited for small parts. The interaction of the electron beam with the work piece produces hazardous x-rays, and only highly trained personnel should use EBM equipment.

References

1. http://www.eod.gvsu.edu/eod/manufact/manufact-284.html

2. Kalpakjian, Serope; Schmid, Steven. Manufacturing Engineering and Technology. Upper Saddle River, NJ: Pearson Prentice Hall, 2006, pp. 854-855.


Wikimedia Foundation. 2010.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

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

  • Electron Beam Melting — (EBM) is a type of rapid prototyping for metal parts. It is often classified as a rapid manufacturing method. The technology manufactures parts by melting metal powder layer per layer with an electron beam in a high vacuum. Unlike some metal… …   Wikipedia

  • Machining — Machine shop redirects here. For the record label, see Machine Shop Recordings. New Guinea in 1943. Mobile Machine Shop truck of the US Army with machinists working on automotive parts. Conventional machining is a form of subtractive… …   Wikipedia

  • Focused ion beam — Focused ion beam, also known as FIB, is a technique used particularly in the semiconductor and materials science fields for site specific analysis, deposition, and ablation of materials. The FIB is a scientific instrument that resembles a… …   Wikipedia

  • Metalworking — Machining a bar of metal on a lathe. Metalworking is the process of working with metals to create individual parts, assemblies, or large scale structures. The term covers a wide range of work from large ships and bridges to precise engine parts… …   Wikipedia

  • Электроннолучевая механическая обработка — Electron beam machining Электроннолучевая механическая обработка. Удаление материала расплавлением и испарением участков заготовки в точке соударения сосредоточенного высокоскоростного потока электронов. Механическая обработка выполняется в… …   Словарь металлургических терминов

  • machine tool — machine tooled, adj. a power operated machine, as a lathe, used for general cutting and shaping of metal and other substances. [1860 65] * * * Stationary, power driven machine used to cut, shape, or form materials such as metal and wood. Machine… …   Universalium

  • Photonic metamaterial — Electromagnetism Electricity · …   Wikipedia

  • metallurgy — metallurgic, metallurgical, adj. metallurgically, adv. metallurgist /met l err jist/ or, esp. Brit., /meuh tal euhr jist/, n. /met l err jee/ or, esp. Brit., /meuh tal euhr jee/, n. 1. the technique or science of working or heating metals so as… …   Universalium

  • Direct Manufacturing — Direct Manufacturing, or DM for short, is one of many available technologies used to produce a three dimensional (3D) near net shape part or component using an additive layer over layer process, which is commonly referred to as Additive… …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”