Electron beam welding process-equipment used, Mechanical Engineering

EQUIPMENT USED IN EBW

The electron beam equipment can be broadly divided in to the following sub systems.

Electron Gun and Beam Guidance System


The heart of the electron beam welding process is the electron beam gun assembly. Electrons are generated by heating a negatively charged emitting material to its thermionnic emission temperature range thus causing electrons can be attracted to the positively charged anode. The grid cup and the anode are shaped and positioned in such a way as to form the emitted electrons into a beam, which passes through the anode aperture.

Recent developments in electron beam welding equipment


In early days, the guns used were of the directly heated ribbon type, normally these are relatively low power electron beam guns. With the push to higher beam power levels, the difficulties of generating precision beams, control, stabilisation & reproducibility became more exacting. These are suffer from inconsistency and movement within the grid cup, the power density distribution was distorted by the ellipsoidal emission surface. To improve the performance of an electron beam heating, a little change in these conventional type electron beam guns is made by introducing a cathode which is to be heated by bombardment of electrons emitted from the heated filament. This change would make it more reliable at higher power continues operation for longer time. These type of electron beam guns are indirectly heated (bombarded) cathode type electron beam guns.

Posted Date: 9/17/2012 6:52:59 AM | Location : United States







Related Discussions:- Electron beam welding process-equipment used, Assignment Help, Ask Question on Electron beam welding process-equipment used, Get Answer, Expert's Help, Electron beam welding process-equipment used Discussions

Write discussion on Electron beam welding process-equipment used
Your posts are moderated
Related Questions
Assume the production function for a rm is given by the equation Q = L √K. Graph the isoquants corresponding to Q = 10, Q = 20, and Q = 50. Do these isoquants exhibit diminishing

Determine root of equation xe x = cosx by Muller's method. Solve the following equations by Matrix Inversion method.

Joule's Law and Enthalpy - Thermodynamics: Joule ' s Law Joules law experiment is based on the constant volume process, and it state that I.E. of perfect gas is a fun

I need a symbol for push and turn

Type of strain: There are basically four type of strain 1. Tensile strain 2. Compressive strain 3. Volumetric strain 4. Shear strain

With neat diagram illustrate the cycle of operation of four-stroke spark ignition engine. In what respects four-stroke cycle CI engine differ from that of SI engine ?

Define and classified parallel forces Sol.: The forces, the lines of action of which are parallel to each other, are called as parallel forces. They do not meet at one point

how an axial thrust is a generated in a helical gear

Can you explain about MIS ? What is the role of MIS in decision making ? Illustrate standardization, specialization and simplification in product design and development.

Define Specific Volume (v) It is illustrated as volume occupied by the unit mass of the system. Its unit is m 3 /kg. Certain volume is reciprocal of density. ν = v/m; m 3 /k