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
in orthographic projection why in quadrant is taken in anticlock wise

(a) What do you understand by steering gear ? Explain with a clean sketch the working of Davis steering gear process. Also show the required equation between wheel base and distanc

Eccentricity : This is distance between the axis of rotation and CG of mass. Unbalance : This is the product of mass and eccentricity. Balancing : This is

full defination


(a) Illustrate critical damping and its uses. (b) A horizontal spring mass system with coulomb damping has a mass of 5 Kg attached to a spring of stiffness 1KN/m. if the coeffic

how we made parts of engine

proof of work being a path function

Q. Burner Management - Discrete Controls for steam generators? The burner management system shall control the generator operation during pre-purge, light off, normal operation,

its definition, principle, explanation, application, and a diagram