Electron beam welding(ebw)-basic principle, Mechanical Engineering

Assignment Help:

BASIC PRINCIPLE OF ELECTRON BEAM WELDING(EBW)

 

Electron beam welding which utilises a heat source of electrons which are accelerated by an electric field to mextremely high speeds and focused to ma sharp beam by electrostatic or electromagnetic fields , which is used for welding a wide range of metals in thickness ranging from foils to extremely thick sections.

Electrons are produced at the cathode surface by thermonic emission. The most common emitter material used is tungsten, which contains a small percentage of rhenium. They are being accelerated by high voltage applied between the cathode and the anode. The shape of the bias cup and anode are so designed that the electrons are focused by the electrostatic field and emerge through the anode aperture as a collimated beam. This beam impinges on to the target by the magnetic field of focusing lens, which permits the high concentration of power at the point of impact. The kinetic energy of the electrons is transferred into heat energy which melts / fuses the metal. In general, electron beams in the energy ranges from 100 kV to 10 MV with average powers ranging from 1 kW to 500 kW.


Related Discussions:- Electron beam welding(ebw)-basic principle

Explain working of nozzles, Q. Explain working of Nozzles? Nozzles supp...

Q. Explain working of Nozzles? Nozzles supporting agitators, pumps, or other mechanical equipment, shall be suitably reinforced to withstand the mechanical loadings, specified

Describe the elements of polyhedral objects, Describe the Elements of Polyh...

Describe the Elements of Polyhedral objects Objects that are often encountered in engineering applications can be classified as either polyhedral or curved objects. A polyhedr

How can we transfer data among cad system, How can we transfer data among C...

How can we transfer data among CAD system The three main reasons for transferring data among CAD systems (or CAE systems or agents etc.) are : (i)  To communicate with remot

Spot welding of different metals-nickel and monel metal, Spot welding of di...

Spot welding of different metals-Nickel and monel metal While spot welding these materials, the settings are to be properly maintained. Welding time, in this case, is only 50 %

Pultrusion, Pultrusion Structure sections of long length are generated...

Pultrusion Structure sections of long length are generated by putting the fibres via resin bath and heated dies of exact shapes. Unidirectional fibres along with high volume f

Derive the expression of torque in closely excited system., Q.   Derive the...

Q.   Derive the expression of torque developed in closely excited magnetic system. Clearly explain then assumption made.   Sol. Double - Excited System   A doubly - ex

Testing of resistance welds, TESTING OF RESISTANCE WELDS There are a nu...

TESTING OF RESISTANCE WELDS There are a number of destructive and non destructive tests available for testing the welds obtained by resistance welding. Radiographic or Ultrason

Transverse wave stretched string, Transverse Wave Stretched String As a...

Transverse Wave Stretched String As a typical example of wave motion in one-dimension, let us consider the transverse harmonic waves on a long, taut string. We assume that in e

Find out the velocity of the bullet, Find out the velocity of the bullet: ...

Find out the velocity of the bullet: A bullet of weight W 1   = 5 N is fired into a body B 2 of weight W 2   = 45 N suspended by a string of length L = 1 metres. Because of i

Write Your Message!

Captcha
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