The electron beam machining Process besides comes under one of those Non-traditional machine methods where highly dedicated accuracy is maintained. It is besides called EBM.

In the final article, we had discussed Ultrasonic Machining, Electrical Discharge Machining, Electrochemical Machining, etc. whereas, in today ‘s article, we will discuss EBM along with Definition, Parts, Working Principle, Process Parameters, Characteristics, Applications, Advantages, and Disadvantages in a detail way .
sol, lets start with the definition of Electron Beam Machining.

Electron Beam Machining Definition:

Electron beam Machining is a process in which a high velocity of electrons are concentrated through a narrow beam and is then directed towards the workpiece such that the material removal takes place by melting and vaporizing from the surface of the workpiece.

Electron Beam Machining Parts:

The parts of Electron Beam Machining are as follows.

Electron gun:

The major depart of the electron air machine march is the Electron gunman which acts as a cathode and contains tungsten or tantalum fibril that generates the beam of electrons to remove the material from the open of a workpiece .

Vacuum chamber:

It is used such that there is no possibility of publicize in the setup.

Grid cup:

The electrons which were generated by the electron accelerator was been controlled by the grid cup .

Anode:

To accelerate the electrons to a much eminent speed, anode is used in the experimental frame-up.

Focusing lens:

Their chief aim is to allow the beam of convergent electrons to pass through it and they are used to focus the beam of light on a particular blot .

Deflector Coils:

Deflector coil guides the high-speed electron balance beam onto the desire localization of the workpiece maintaining efficiency for the constitution of holes.

Workpiece and Table:

The workpiece is the region where we need to focus the balance beam of light to pass which removes the corporeal from the airfoil of the workpiece. The table is used to hold the workpiece properly .
Electron Beam Machining Process
These are the parts of EBM. Lets discuss the working principle of it …

Electron Beam Machining Working Principle:

The working rationale of Electron Beam machine is as follows .
When a very high electric potential power supply is given to the electron gun, it is producing very high-speed electrons in all the directions.

By using a charismatic lens or the deflector, all these high-speed electrons are collected and formed like a beam of electrons having the cross-section area less than 0.05-millimeter square .
When this high-speed electron beam is impinging onto the workpiece, the kinetic energy of electrons is converted into inflame department of energy.

therefore heat is getting generated at the workpiece and by using this heat, the workpiece is getting melting and evaporating i.e. the mechanism is melting and evaporation.
To avoid the Dispersion of electrons after the magnetic lens, the entire apparatus is kept in a container which is maintained with a arrant vacuum.

There is no tool used and only an electron gunman is used which is made by using a Germanium crystal character of material .

Medium: Perfect Vaccum Wear Ratio: eternity .

This is the explanation behind the knead of the Electron Beam Machining procedure.

Process Parameters of Electron Beam Machining:

The process parameters of EBM are as follows.

  • Beam current: It is related to the emission of electrons by the cathode in the beam whose value is as low as 1µA.
  • Duration of Pulse: It can be varied from 50 µs to 15 ms.
  • Accelerating voltage (Va) is 100 Kv.
  • Energy per pulse is 100 J/Pulse.

Characteristics of EBM:

The machining characteristics which are directly effected by the process parameters in EBM are:

  • The velocity of the electron is 1.6 x 10^8 m/s.
  • Specific power consumption is 0.5 to 50 kW.
  • The MRR(Material Removal Rate) is up to 40 mm^3/s.
  • The depth of cut is up to 6.5mm.
  • Medium is Vaccum.
  • The power density is 6500 billion W/mm^2.

Applications of Electron Beam Machining Process:

The applications of Electron Beam Machining Process are as follows.

  • Mainly used for producing holes in the diesel injection nozzles.
  • Also used for producing blind holes, narrow slots, etc. in the workpieces.
  • In electron beam machining, if the voltage given to the electron gun is about 60 to 70000 volts, the velocity of electrons produced is reducing, heat generation at the workpiece is reducing.
  • Therefore, the heat generated is sufficient to melt and join the workpiece called an electron beam welding operation.

Advantages of Electron Beam Machining Process:

The advantages of Electron Beam Machining Process are as follows.

  • Very very small size holes can be produced.
  • Highly reactive metals can be machined easily because of perfect vacuum is maintained.
  • Heat affected zone will be minimum.

Disadvantages of Electron Beam Machining Process:

The disadvantages of Electron Beam Machining Process are as follows.

  • Workpiece material must be electrically conductive.
  • Maintaining a perfect vacuum is difficult.
  • Out of all the non-traditional machining methods, the electron beam method has the lowest material removal rate.
  • Because the total setup is kept in an enclosure, the machining zone can’t be seen by a machine operator.

This is the complete explanation about the Electron Beam Machining work in a detail manner. If you have any doubts, feel free to ask from the comments section.

References [External Links]:

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