Electron beam welding process-equipment used, Mechanical Engineering

Assignment Help:


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.

Related Discussions:- Electron beam welding process-equipment used

Trippaing, how thw trippaning process work

how thw trippaning process work

Form tool design, I want to make a form tool for lathe for making a convex ...

I want to make a form tool for lathe for making a convex groove of 3 mm radius. tool material will be tungsten carbide. I want to know the dimensions of tool. What is the procedure

Thermodynamics, Show that heat is a path path function and not a property...

Show that heat is a path path function and not a property of system

Distribution of circumferential stress intensity, A thick cylinder 125 mm i...

A thick cylinder 125 mm inside diameter and 250 mm outside diameter is subjected to an internal fluid pressure of 50N/mm 2 . Determine the maximum and minimum intensities of circum

Explain thermodynamics system, Explain Thermodynamics System In thermod...

Explain Thermodynamics System In thermodynamics the system is illustrated as the quantity of matter or region in space upon which the concentration is concentrated for the sake

Illustrate critical damping, Illustrate any three of the following : (i)...

Illustrate any three of the following : (i) Critical Damping (ii) Logarithmic decrement (iii) Vibration Isolation (iv) Equivalent stiffness of spring in series and in p

Explain welding process, Welding Process: There are many definition of a we...

Welding Process: There are many definition of a welding process. But the most comprehensive definition is below. Welding is defined as a "a localized coalescence of metals, wher

Explain the function of screw conveyor with auger, Function of screw convey...

Function of screw conveyor with auger "To spread the road making raw material on the road during the operation"An auger/cut off assembly for a floating screed asphalt paver. Th

Synthesize a mechanism to prepare a function, Synthesize a mechanism to pre...

Synthesize a mechanism to prepare a function y = log x for 1≤ x ≤ 2 where three precision points are needed, for these precision points Calculate φ 2 , φ 3 and ψ 2 , ψ 3 ; if Δφ

Heat loss in acylindrical pipe, Ask question #Minimum 1. Research the topic...

Ask question #Minimum 1. Research the topic of heat loss in a cylindrical pipe. Explain which laws of physics are used to discuss heat loss in a pipe, and briefly explain how the f

Write Your Message!

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd