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ELECTRON BEAM WELDING
Er. Sushant Bhatt, Lecturer, Deptt. Of Mechanical Engg. (IDS)
Email: sushantbhatt.ids@srmu.ac.in
Er. Arvind Verma, HoD, Deptt. Of Mechanical Engg. (IDS)
Email: hod.dip.me@srmu.ac.in
Shri Ramswaroop Memorial University, Barabanki, 225003
“Electron-Beam
welding (EBW) is a
fusion welding
process in which a
beam of high-
velocity electrons is
applied to two
materials to be
joined.”
https://images.app.goo.gl/gc3fEssDfo34uL469
Electron Beam welding
 This heat is further
used to weld two
welding plates.
 When a high jet of
electrons strike at
welding plates, its
kinetic energy converts
into heat energy.
 This heat energy is
sufficient to fuse two
metal plates together
to form a weld joint. https://images.app.goo.gl/TRh3g2CpTqKt4P7YA
This process uses kinetic energy of electrons to
produce heat.
Power Supply:
 This process uses a power source to supply continuous
beam of electrons for welding process.
 The voltage range of welding is about 5 – 30 kV for low
voltage equipment’s or for thin welding and 70 – 150 kV
for high voltage equipment’s or for thick welding.
Electron Gun:
 It is heart of electron beam welding.
 It is a cathode tube (negative pole) which generates
electrons, accelerate them and focus it on a spot.
 This gun is mostly made by tungsten or tantalum alloys.
 The cathode filament heated up to 2500 degree
centigrade for continuous emission of electrons.
Equipment’s
Equipment’s
Anode:
 Anode is a positive pole which is just after the electron gun.
 Its main function is to attract negative charge, (in this case
electron) provide them a path and don’t allow them to diverge
from its path.
Magnetic Lenses:
 There are a series of magnetic lenses which allows only
convergent electrons to pass.
 They absorb all low energy and divergent electrons, and
provide a high intense electron beam.
Electromagnetic lens and deflection coil:
 Electromagnetic lens used to focus the electron beam on work
piece and deflection coil deflect the beam at required weld
area.
 These are last unit of EBW process.
Equipment’s
Work holding device:
 EBW uses CNC table for hold work piece which can
move in all three direction. The welding plates are
clamped on CNC table with the use of suitable fixtures.
Vacuum Chamber:
 This process takes place in a vacuum chamber.
 Vacuum is created by mechanical or electric
driven pump.
 The pressure ranges in vacuum chamber is about 0.1 to
10 Pa.
 First the electron gun, which
is a cathode, produces
electrons.
 These electrons move
towards anode which is
positive charged and placed
right after electron gun.
 The anode accelerates the
electrons and form a
electron jet which is further
move towards magnetic
lenses.
Working Principle
 The magnetic lenses are a series
of lenses which are used to
absorb low energy electrons and
does not allow to divergent
electron to passes through it.
 It provides a high intense
electron jet.
 Now this electron beam passes
through electromagnetic lens
and defecting coil which are
used to focus and deflect the
electron beam at the required
spot.
Working Principle
 This unit direct high velocity
electron beam to the weld
cavity where its kinetic energy
converts into heat energy due
to collision.
 This heat energy is used to
create weld by fusion.
 This whole welding process
carried out in a vacuum
chamber otherwise the
electrons collides with air
particle in the way and loses its
energy.
Working Principle
Advantages:
 It can weld both similar and dissimilar metals.
 It provides high metal joining rate.
 Low operating cost because no filler material
and flux are used.
 It provide high finish welding surface.
 It can used to weld hard materials.
 Less welding defects occur due to whole
process carried out in vacuum.
Advantages and Disadvantages
Disadvantages:
 High capital or set up cost.
 High skilled labor required.
 Frequently maintenance required.
 Work pieces size is limited according to
vacuum chamber.
 It cannot do at site due to vacuum.
Advantages and Disadvantages
 It is used in aerospace industries and marine
industries for structure work
 It is used to join titanium and its alloy.
 This type of welding is widely used to
join gears, transmission system, turbocharger etc. in
automobile industries.
 It is used to weld electronic connectors in electronic
industries.
 This process is also used in nuclear reactors and in
medical industries.
APPLICATIONS
 A Textbook of Welding Technology by O.P. Khanna.
 Welding Science and Technology by Md. Ibrahim
Khan.
 https://www.theweldingmaster.com
 https://www.mech4study.com
 https://www.safetyandhealthmagazine.com
 https://images.app.goo.gl/TRh3g2CpTqKt4P7YA
References
THANK
YOU

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Iwt unit 5 electron beam welding sushant bhatt

  • 1. ELECTRON BEAM WELDING Er. Sushant Bhatt, Lecturer, Deptt. Of Mechanical Engg. (IDS) Email: sushantbhatt.ids@srmu.ac.in Er. Arvind Verma, HoD, Deptt. Of Mechanical Engg. (IDS) Email: hod.dip.me@srmu.ac.in Shri Ramswaroop Memorial University, Barabanki, 225003
  • 2. “Electron-Beam welding (EBW) is a fusion welding process in which a beam of high- velocity electrons is applied to two materials to be joined.” https://images.app.goo.gl/gc3fEssDfo34uL469 Electron Beam welding
  • 3.  This heat is further used to weld two welding plates.  When a high jet of electrons strike at welding plates, its kinetic energy converts into heat energy.  This heat energy is sufficient to fuse two metal plates together to form a weld joint. https://images.app.goo.gl/TRh3g2CpTqKt4P7YA This process uses kinetic energy of electrons to produce heat.
  • 4. Power Supply:  This process uses a power source to supply continuous beam of electrons for welding process.  The voltage range of welding is about 5 – 30 kV for low voltage equipment’s or for thin welding and 70 – 150 kV for high voltage equipment’s or for thick welding. Electron Gun:  It is heart of electron beam welding.  It is a cathode tube (negative pole) which generates electrons, accelerate them and focus it on a spot.  This gun is mostly made by tungsten or tantalum alloys.  The cathode filament heated up to 2500 degree centigrade for continuous emission of electrons. Equipment’s
  • 5. Equipment’s Anode:  Anode is a positive pole which is just after the electron gun.  Its main function is to attract negative charge, (in this case electron) provide them a path and don’t allow them to diverge from its path. Magnetic Lenses:  There are a series of magnetic lenses which allows only convergent electrons to pass.  They absorb all low energy and divergent electrons, and provide a high intense electron beam. Electromagnetic lens and deflection coil:  Electromagnetic lens used to focus the electron beam on work piece and deflection coil deflect the beam at required weld area.  These are last unit of EBW process.
  • 6. Equipment’s Work holding device:  EBW uses CNC table for hold work piece which can move in all three direction. The welding plates are clamped on CNC table with the use of suitable fixtures. Vacuum Chamber:  This process takes place in a vacuum chamber.  Vacuum is created by mechanical or electric driven pump.  The pressure ranges in vacuum chamber is about 0.1 to 10 Pa.
  • 7.  First the electron gun, which is a cathode, produces electrons.  These electrons move towards anode which is positive charged and placed right after electron gun.  The anode accelerates the electrons and form a electron jet which is further move towards magnetic lenses. Working Principle
  • 8.  The magnetic lenses are a series of lenses which are used to absorb low energy electrons and does not allow to divergent electron to passes through it.  It provides a high intense electron jet.  Now this electron beam passes through electromagnetic lens and defecting coil which are used to focus and deflect the electron beam at the required spot. Working Principle
  • 9.  This unit direct high velocity electron beam to the weld cavity where its kinetic energy converts into heat energy due to collision.  This heat energy is used to create weld by fusion.  This whole welding process carried out in a vacuum chamber otherwise the electrons collides with air particle in the way and loses its energy. Working Principle
  • 10. Advantages:  It can weld both similar and dissimilar metals.  It provides high metal joining rate.  Low operating cost because no filler material and flux are used.  It provide high finish welding surface.  It can used to weld hard materials.  Less welding defects occur due to whole process carried out in vacuum. Advantages and Disadvantages
  • 11. Disadvantages:  High capital or set up cost.  High skilled labor required.  Frequently maintenance required.  Work pieces size is limited according to vacuum chamber.  It cannot do at site due to vacuum. Advantages and Disadvantages
  • 12.  It is used in aerospace industries and marine industries for structure work  It is used to join titanium and its alloy.  This type of welding is widely used to join gears, transmission system, turbocharger etc. in automobile industries.  It is used to weld electronic connectors in electronic industries.  This process is also used in nuclear reactors and in medical industries. APPLICATIONS
  • 13.  A Textbook of Welding Technology by O.P. Khanna.  Welding Science and Technology by Md. Ibrahim Khan.  https://www.theweldingmaster.com  https://www.mech4study.com  https://www.safetyandhealthmagazine.com  https://images.app.goo.gl/TRh3g2CpTqKt4P7YA References