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V.B.POLYTECCHNIC

V.B.POLYTECCHNIC. NAME : Mistry Rihen SEMISTER : 3rd DIV : B E.NO : 106550319107 BATCH NO : 105 SUB.NAME : M.E.-1 SEMINAR NAME : Electron Beam Welding. INTRODUCTION :. EBW :

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V.B.POLYTECCHNIC

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  1. V.B.POLYTECCHNIC NAME : Mistry Rihen SEMISTER : 3rd DIV : B E.NO : 106550319107 BATCH NO : 105 SUB.NAME : M.E.-1 SEMINAR NAME : Electron Beam Welding

  2. INTRODUCTION : • EBW : “Fusion Welding Process in which a beam of high velocity electrons is applied to materials being joined”. • Kinetic energy of electrons is transformed in to Heat Energy. • Work pieces melt due to heat and joining occurs. • Molten metal will flow to fill the gap.

  3. DIAGRAM :

  4. WORKING: • Current is given to cathode in vacuum chamber and heated up to 2000 °C. • So, electrons are emitted and will be attracted towards anode. • Electrons are accelerated due to potential between anode and cathode. • Electrons will pass through the hole and form a beam of high intensity.

  5. Electron beam having High Power Density can be controlled by focusing coil. • Electron beam will struck on work piece with high velocity and produce heat energy. • So, metal will meltdown and molten liquid metal will flow in the gap. • Thus , welding is performed and metals can be joined.

  6. STEPS USED IN EBWPROCESS : • Joint Preparation • Cleaning of work pieces • Fixturing of work pieces • De-magnetization of work pieces • Setting up work pieces in chamber • Pump down air from chamber • Carry welding process

  7. ADVANTAGES : • It is high quality welding. • Very less defective because electron beam covers sharp area on metal which is being heated. • Welding on reactive metal can be done easily in vacuum chamber. • Butt joint process can be done without edge preparation in pieces having width up to 6 mm.

  8. DISADVANTAGES : • Primary costs are high. • Transportation of equipments are not easy. • Vacuum is required every time in chamber. • Skilled persons are needed for process. • Space in chamber is very small so cant useful for larger piece. • Manipulation of work piece needs special care & instruments in chamber. • Electron beam flows in straight line so if obstacle comes then welding will stop.

  9. APPLICATION : • Welding of reactive and refractory metal. • For welding of two different metals like steel, copper, titenium etc. • Automobile and aircraft

  10. CONCLUSION : • So, we can conclude that Electron Beam Welding is very useful in which correctness and accuracy is required and most of commercial application it is wildly used.

  11. REFERENCE : • www.wikipedia.com • Manufacturing Engineering by M.K.Vora.

  12. THANKS

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