please do not enter any spam link in the comment box The appearance of EBM equipment is very similar to electron beam welding equipment. Electron beam machining (EBM) had been used in aerospace and nuclear industry since 1960 for welding applications. Their kinetic energy is converted into heat b. Electron beam machining is same as laser beam machining process in which except laser, high speed electron beam impinges on work piece. A typical triode EBM gun functions in a manner very similar to an EBW gun. In the electrical beam machining, electrical energy is used to generate the electrons with high energy. The source of energy in electron beam machining is high velocity electrons, which strikes the surface of the workpiece and generate heat. Registered in England & Wales No. Meaning of Electron Beam Machining (EBM): In this process, the material is removed with the help of a high velocity (travelling at half the speed of light, i.e. A wide range of materials, such as stainless steel, nickel and cobalt alloys, copper, aluminum, titanium, ceramics, leather, and plastics, can be successfully processed by EBM. These high energy electrons possess high energy density generally in the order of 10ˆ4 kW/mm²… An electron "cloud" is generated by a superheated tungsten filament, which also acts as the cathode. In an electron beam machining the electrons strike the. Power requirements are on the order of 0.5-60 kW. EmoticonEmoticon, In this mechanical engineering lecture today we learned about machine design subjects. The heat energy so produced is used to melt and vaporize the materials from the w/p. In the Electron Beam Machining process, a high velocity focused beam of electrons are used to remove the metal from the workpiece. Electron beam machining is a thermal process used for metal removal during the machining process. Traffic tools, such as cars, trains, planes, etc 3. d) none of these. Electron Beam Machining can machine metallic as well as nonmetallic workpiece. Today we study of mcq on rolling contact bearing (objecti... Mcq on electron beam machining (objectives questions and answers). Correct answer:a. Q 29. Hello friends my name is Roshan Namdeo Waje and founder of mechstudy.here I shere the imforfation about mechanical engineering. EBW is often performed under vacuum conditions to prevent dissipation of the electron beam. In a vacuum chamber, a beam of high-velocity electrons is focused on a workpiece. 2. All power supply variables, such as the accelerating current, focus current, pulse duration, and others, are controlled by a CNC unit or by a microcomputer. The two electrodes workpiece and tool is immersed in an electrolyte (such as NaCl). They get scattered A typical triode EBM gun functions in a manner very similar to an EBW gun. In an electron beam machining, the electrons strike the workpiece with a high velocity. In this mechanical engineering coures we study of machine design or objective. Electron beam machining is the metal removal process by a high-velocity focussed stream of electrons which heats, melts and vaporizes the work material at the point of bombardment.. All kinds of weapons and equipment: guns, canon, tanks, rockets, et… Electron beam machining does not apply any cutting force on the workpiece, thus very simple work holding is required. This is why machining fragile and brittle materials is obtainable using this method. In this mechanical engineering lecture today we learned about machine design subjects Mcq on electron beam welding (objectives questions and answers). Burr free b. c) electrolyte. 22.16 Which one of the following processes would be appropriate to drill a hole with a square cross section, 6 mm (0.25 in) on a side and 25 mm (1 in) deep in a steel workpiece: (a) abrasive jet machining, (b) chemical milling, (c) EDM, (d) laser beam machining, (e) oxyfuel cutting, (f) … Electron Beam Machining (EBM) Electro-Chemical Machining (ECM) ... Material removal takes place from all such points on the workpiece where the electron beam is focused. 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 … This sputter etching mechanism is very simple. 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. Click here to navigate to respective pages. In Electron beam machining, workpiece is held in. a) vacuum chamber. focused stream of electrons which are focused magnetically upon a very small area. 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. Because EBM is a thermal machining process, some thermal effects remain on the machined edge after processing. c. Direct contact machining d. Capable of producing sharp corners (Ans:a) 18. When high-speed electrons in a densely focused beam impact with the workpiece surface, most of the kinetic energy of the electrons is converted into heat energy. Electron beam machin mcq, mcqs on electron beam machining, multiple choice questions on electron beam machining, electron beam machining multiple choice question, electron beam machining objective questions, quiz on electron beam machining, mcq on electron beam machining, electron beam machining questions and answers, electron beam machining objectives questions,test … This whole process takes place in vacuum chamber. Electrochemical machining (ECM) is a machining process in which electrochemical process is used to remove materials from the workpiece. The Electron beam machining (EBM) process begins after the workpiece is placed in the work chamber and a vacuum is achieved. In electron beam machining workpiece is held in. The whole process takes place in vacuum. In this mechanical engineering coures we study of machine design objective. Chemical Machining (CM) is the process where, desired amount of material is removed from the remaining portion of work surface by the application of reactive chemicals. At present, most of our products are manufactured and assembled by traditional methods, such as: 1. In Electron beam machining, as the electrons strikes the work piece a. As the electron strikes the workpiece, the kinetic energy of the electron changes into heat energy. Click here to navigate to parent product. The kinetic energy of the electrons, upon striking the workpiece, changes to heat, which vaporizes… b) dielectric medium. The workpiece is held stationary while the electron beam is programmed to cut the pattern. The appearance of EBM equipment is very similar to electron beam welding equipment. Electron-beam machining (EBM) is a process where high-velocity electrons concentrated into a narrow beam that are directed towards the work piece, creating heat and vaporizing the material.EBM can be used for very precise cutting or boring of a wide variety of metals. In Electron beam machining, workpiece is held in a. vacuum chamber b. dielectric medium c. electrolyte d. none of these (Ans:a) 19. Home >> Category >> Mechanical Engineering (MCQ) questions and answers >> Manufacturing Processes - 2 Q. It consists in bombarding the work with accelerated ions which collide with the surface atoms of the work. Click here to search books using title name,author name and keywords. The beam current is usually between 0.1-1.0 mA. In the process, workpiece is taken as anode and tool is taken as cathode. ConversionConversion The Electron beam machining (EBM) process begins after the workpiece is placed in the work chamber and a vacuum is achieved. In Electron beam machining, as the electrons strikes the work piece a. In electron beam machining (EBM) vacuum Is maintained to have proper kinetic energy of electron beam. Advanced Machining Process - Mechanical Engineering (MCQ) questions and answers Home >> Category >> Mechanical Engineering (MCQ) questions and answers >> Advanced Machining Process 1) The Laser Beam Machining process can be carried out, when the media for energy transfer between tool and workpiece is In this mechanical engineering coures we study of machine design or objective. 160,000 km/sec.) The Electron beam machining (EBM) process begins after the workpiece is placed in the work chamber and a vacuum is achieved. • A magnetic deflection coil is used to make electron beam circular and to focus electron beam at a point (localized heating). The following conditions are used: cutting velocity is 180 m/min, feed is 0.20 mm/rev, … ... Rubbing action between tool and workpiece. 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 Electrons escapes from the hot surface and a voltage of 50 to 200 kV helps to accelerate them. EBM is also used for microdrilling, cutting, and engraving applications. 30990675 Howick Place | London | SW1P 1WG © 2020 Informa UK Limited. 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. It is mostly used to drill holes in any shape. This will generate high heat energy and melts and vaporize metal from work piece. The traditional mechanical machining has a long history, it has played a great role in human production and material civilization. Surface finish is better and kerf width is narrower than those for other thermal cutting processes. As electron beam machining is grouped under the thermal category, it is natural to have thermal damages as part of the result. Not for hard metals c. Direct contact machining d. Capable of producing sharp corners (Ans:a) 6. Electron Beam Machining is a non-conventional machining process or Non-traditional process. In Electron beam machining, workpiece is held in. The workpieces melt and flow together as the kinetic energy of the electrons is transformed into heat upon impact. Electron beam machining is process in which high velocity electrons are concentrated in a narrow beam and then directed towards the workpiece for machining. DOI link for Electron Beam Machining (EBM). The extremely high pulse energy available with EBM explains the ability of the process to rapidly drill very deep and large-diameter holes. d) … Calculate the power required for machining of a workpiece on lathe having efficiency of 85% on full load, when tangential force required is … 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. This article provides a description of equipment used for EBM and discusses the process characteristics, applications, advantages, and disadvantages of electron beam drilling. Electron beam machining (EBM) Chemical and electrochemical energies are utilized in case of Chemical Machining (CM) and Electrochemical Machining (ECM) respectively. This phenomenon has been well understood since the development of electron microscopy when attempts to use the electron beam as a machining tool were made. Answer : (A) electron beam machining Subject : Machining and Machine Tool Operations ... Orthogonal turning is performed on a cylindrical workpiece with shear strength of 250 MPa. Ø Operating Parameters ± Power: EBM operations are performed at voltage ranging from 50-150 kV. This contains 10 Multiple Choice Questions for Mechanical Engineering Unconventional Machining Process - 3 (mcq) to study with solutions a complete question bank. Ionic dissolution rate is faster at the closest point between tool and workpiece. Thus surface asperities and waviness influence the dissolution rate significantly. The appearance of EBM equipment is very similar to electron beam welding equipment. b) dielectric medium. • The workpiece to be machined is located under the electron beam and is kept under vacuum. c) electrolyte. a) vacuum chamber. Electron beam machining (EBM) uses a focused beam of high-velocity electrons to remove material. In Electron beam machining, workpiece is held in a. vacuum chamber b. dielectric medium c. electrolyte d. none of these (Ans:a) 7. A typical triode EBM gun functions in a manner very similar to an EBW gun. ; 2. Breadcrumbs Section. Household appliances: refrigerators, washing machines, air conditioners, etc.