Ionic dissolution rate is faster at the closest point between tool and workpiece. The process is different from electric discharge, electron beam, laser and plasma arc machining in that the process does not depend on heating of the workpiece to the point of evaporation. Thus surface asperities and waviness influence the dissolution rate significantly. 160,000 km/sec.) In this mechanical engineering coures we study of machine design or objective. focused stream of electrons which are focused magnetically upon a very small area. This will generate high heat energy and melts and vaporize metal from work piece. a) vacuum chamber. The beam current is usually between 0.1-1.0 mA. The appearance of EBM equipment is very similar to electron beam welding equipment. Home >> Category >> Mechanical Engineering (MCQ) questions and answers >> Manufacturing Processes - 2 Q. These high energy electrons possess high energy density generally in the order of 10ˆ4 kW/mm²… EBM is also used for microdrilling, cutting, and engraving applications. Correct answer:a. Q 29. Electron beam machining (EBM) had been used in aerospace and nuclear industry since 1960 for welding applications. Ø Operating Parameters ± Power: EBM operations are performed at voltage ranging from 50-150 kV. b) dielectric medium. MAGNETIC LENSES - Which shapes the electron beam and doesn't allow to deflect electrons, this lenses allow only to pass convergent electron, thus a highly focused beam is obtained, they also accept the low energy electrons thereby improving the quality of the same 3.WORKPIECE AND HOLDING DEVICE - It can machine both metallic and nonmetallic device, the workpiece is held by a … Registered in England & Wales No. The production of free electrons is obtained from thermo-electronic cathodes wherein metals are heated to the temperature at which the electrons gain enough speed for escaping to the space around the cathode. Other articles where Electron-beam machining is discussed: machine tool: Electron-beam machining (EBM): The EBM technique is used for cutting fine holes and slots in any material. At present, most of our products are manufactured and assembled by traditional methods, such as: 1. In Electron beam machining, workpiece is held in a. vacuum chamber b. dielectric medium c. electrolyte d. none of these (Ans:a) 19. The appearance of EBM equipment is very similar to electron beam welding equipment. EmoticonEmoticon, In this mechanical engineering lecture today we learned about machine design subjects. This article provides a description of equipment used for EBM and discusses the process characteristics, applications, advantages, and disadvantages of electron beam drilling. c) electrolyte. The Electron beam machining (EBM) process begins after the workpiece is placed in the work chamber and a vacuum is achieved. Electron beam machining does not apply any cutting force on the workpiece, thus very simple work holding is required. As electron beam machining is grouped under the thermal category, it is natural to have thermal damages as part of the result. In this mechanical engineering coures we study of machine design objective. Electron beam machining is process in which high velocity electrons are concentrated in a narrow beam and then directed towards the workpiece for machining. Their kinetic energy is converted into heat b. Electrochemical Machining (ECM) Download: 15: Electrochemical Grinding , Electrostream Drilling, Shaped Tube Electrolytic Machining: Download: 16: Plasma Arc Machining (PAM) Download: 17: Electron Beam Machining (EBM) Edit Lesson: Download: 18: Laser Beam Machining (LBM) Download: 19: Chemical Machining (ChM) Download • A magnetic deflection coil is used to make electron beam circular and to focus electron beam at a point (localized heating). A typical triode EBM gun functions in a manner very similar to an EBW gun. To make electron beam circular and to focus electron beam machining ( EBM ) process begins after the workpiece machining. A ) 6 piece a a high velocity focused beam of high-velocity electrons transformed... 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