Dec 07, 2016 electron beam machining is a kind of machining process by using highvelocity electron beam. Laser beam machining an overview sciencedirect topics. Electronbeam eb machining is a powerful method for micro and nanofabrication because the beam can be focused to a diameter of the order of a few nanometers. Otherwise the electrons would interact with the air molecules, thus they would lose their energy and cutting ability. Mechanical engineering indian institute of technology kharagpur.
Nov 26, 2012 electron beam welding vs laser welding. Electron beam machining equipment the basic functions of any electron beam gun are to generate free electrons at the cathode, accelerate them to a sufficiently high velocity and to focus them over a small spot size. The historical progress of machining accuracy is plotted and its probable further development is shown by extrapolation, both in the microtechnology and nanotechnology regions. Notes on electron beam machining ebm me mechanical. This property permits the fabrication of nanoscale patterns by using an ebsensitive polymer resist in a process called eb lithography ebl. Electron beam welding is so clever that many people dont appreciate its potential. It is similar to the electron beam welding machine. Characterization of an additive manufactured tial alloy. Electron beam machining ebm kcg college of technology. Electronbeam machining is a kind of machining process by using highvelocity electron beam. Mar 17, 2016 electron beam machining ebm is a thermal process. Download link is provided and students can download the anna university me6004 unconventional machining processes ump syllabus question bank lecture notes syllabus part a 2 marks with answers part b 16 marks question bank with answer, all the materials are listed below for the students to make use of it and score good maximum marks with our study materials. Electron beam welding electron beam eb welding is a high energy density fusion process that transfers energy to a joint using an intense beam of electrons. Advanced manufacturing processes amps electron beam.
These high energy electrons possess high energy density generally in the order of 10. Electron beam and laser beam module 9 non conventional. Electron beam equipment eb welding machines electron. Material used for making a nozzle employed in ajm process may be a copper b stainless steel. Welcome to the course on micromachining iit kanpur. Electron beam, plasma beam and ion beam machining youtube. Located at the same premises as ebe, our associate company, electron beam engineering services ebes provides electron beam welding and laser beam welding systems and weld tooling accessories. Electronbeam machining ebm the ebm technique is used for cutting fine holes and slots in any material. All the components situated in the electron beam gun column. Electron beam machining can be used to accurately cut or bore a wide variety of metals. Manufacturing process technology part2 assignment t 02. Electronbeam machining is a process in which highvelocity electrons are concentrated into a narrow beam with a very high planar power density. In ebm, electrons are accelerated to high velocity as half of the light speed, then it is impinged to. 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.
The kinetic energy of the electrons, upon striking the workpiece, changes to. A detailed notes on electron beam machining process, and surely helps you. Electron beam machiningebm free download as powerpoint presentation. An important advantage of electron beam welding is the ability to be able to weld materials down to considerable depths. Electronbeam machining can be used to accurately cut or bore a wide variety of metals. Singh, balbir singh modern machining processes presents unconventional machining methods which are gradually commercial acceptance. Programme in manufacturing engineering semester 1 sl.
The process is different from electric discharge, electron beam, laser and plasma arc machining in that the process does not. The effects of electron beam focusing characteristics on fusion zone are analytically investigated by ho in 2005 5. The research situation of the previous various electron beam machining methods and applications was discussed, and the various. Paul,department of mechanical engineering, iit kharagpur. Ion beam machining or etching is generally a surface finishing process in which the material removal takes place by sputtering of ions. Study of machining parameters of focused ion beam in fabrication of texture on single crystal diamond tool ganesan ga, m v v s adityaa, akhilesh guptab, sonalc, rakesh g motea, r.
Page 1 module 9 non conventional machining version 2 me, iit kharagpur page 2 module 9 non conventional machining version 2 me, iit kharagpur lesson 40 electron beam and laser beam machining version 2 me, iit kharagpur page 3 module 9 non conventional machining version 2 me, iit kharagpur lesson 40 electron beam and laser beam machining version 2 me, iit kharagpur. Jan 06, 2015 electron beam machining equipment the basic functions of any electron beam gun are to generate free electrons at the cathode, accelerate them to a sufficiently high velocity and to focus them over a small spot size. In electron beam machining process there is a bombardment of high velocity stream of electrons on the workpiece surface so this electrons are bombarded on the. Absence of mechanical contact between work piece and tool. Electron beam machining ebm is a thermal machining process in which highvelocity electrons concentrated into a narrow beam are used for instantly heating, melting, or vaporizing the material. Laser beam machining lbm is one of the most widely used thermal energy based noncontact type advance machining process which can be applied for almost whole range of materials. All aspects of mechanical, electrochemical and thermal processes are. Electron source is an electron gun several times the intensity of a tv gun. Essentially, the electron beam machining is based on the effects generated in the workpiece surface layers as a consequence of the penetration in this layer of electrons included in a high energy electron beam. Electron beam machining is a process in which highvelocity electrons are concentrated into a narrow beam with a very high planar power density. Optimization of bead geometry in electron beam welding using a genetic algorithm by v. Indian institute of technology kharagpur kharagpur, india 722 phone. Here a steam of high speed electrons impinges on the work surface so that the kinetic energy of electrons is transferred to work producing intense heating.
An electron gun is basically a triode consisting of. The paper analyzed the weld quality during electron. The cathode is generally made of tungsten or tantalum. Cathode, to emit high negative potential electrons. Laser beam is focussed for melting and vaporizing the unwanted material from the parent material. Course name ltp c 1 me6l301 machining science 310 4 2 me6l302 advanced manufacturing processesi 310 4 3 me6lxxx elective i 300 3. Even today, new applications are being developed and used industrially, especially where. The applications of the electron beam machining technology in. However in electrochemical machining there is a physical tool that is very much required for machining.
By 1952, first electron beam machine for use as a weldingtool was built at. The source of energy in electron beam machining is high velocity electrons, which strikes the surface of the workpiece and generate heat. The applications of the electron beam machining technology. Lecture notes on modern manufacturing process dr pramod. Indian institute of technology bhubaneswar bhubaneswar 7510 school of mechanical sciences detailed curriculum of m.
The kinetic energy of the electrons, upon striking the workpiece, changes to heat, which vaporizes read more. Vacuum electron beam welding bridge shell technology is the main application of electron beam machining in the automobile manufacturing industry. This will generate high heat energy and melts and vaporize metal from work piece. To focus the electron beams electrostatic or electro magnetic lenses are used. Electron beam welding can also be called as electro optical thermal process because of generation of high velocity electrons and high energy. Mechanical engineering assignment help, define advantage and disadvantage of electron beam machining, define advantage and disadvantage of electron beam machining advantage 1. Pdf me6004 unconventional machining processes ump books. Raob a department of mechanical engineering, indian institute of technology, bombay, 400076. Define advantage and disadvantage of electron beam. All the components situated in the electron beam gun column are given with a vacuum of using turbo molecular pump supported by a. The top countries of suppliers are india, china, and taiwan, china, from which the percentage of electron beam machine supply is 1%, 98%, and 1% respectively. Study of machining parameters of focused ion beam in. The ion beam machining is realized by accelerating and focusing the ion stream generated by the ion source to the surface of the workpiece in a vacuum state. Mechanical engineering indian institute of technology.
Function is to generate, shape and deflect the electron beam to drill or machine the workpiece. Electron beam machiningebm electron machining scribd. Electron beam machining ebm manufacturing process technology part2 assignment t 02 mooc course under nptel july 2016 iit kanpur c. Ebd is a thermal drilling process by which small through holes in the range of 0.
It was initially applied to industrial processes in the 1950s, and has since matured into an important modern joining technology able to produce welds with quality and depth superior. The top countries of suppliers are india, china, and taiwan, china, from which the percentage of electron beam machine supply is. Electron beam gun provides high velocity electrons over a very small spot size. Ionbeam machining or etching is generally a surface finishing process in which the material removal takes place by sputtering of ions. The most common ion beams are of singlycharged ions. In this operation, electric arc is used to produce heat energy and the base metal is heated.
The beam crosssection is then focused and directed toward the work piece, creating heat and vaporizing the material. An ion beam is a type of charged particle beam consisting of ions. Electrochemical machining material removal occurs due to electrochemical dissolution at atomic level in ntm, there may not be a physical tool present. Ion beams have many uses in electronics manufacturing principally ion implantation and other industries. A variety of ion beam sources exists, some derived from the mercury vapor thrusters developed by nasa in the 1960s. Introduction electron beam machining is one of the examples. Electron beam machining is required to be carried out in vacuum. The construction and working principle of the electron beam gun would be discussed in the next section. Electron beam welding experts electron beam processes. The electron beam as a tool is the business basis of all company units of global beam technologies ag. All aspects of mechanical, electrochemical and thermal processes are comprehensively covered.
Essentially, the electron beam machining is based on the effects generated in the workpiece surface layers as a consequence of the penetration in this layer of electrons included in. Further, the beam needs to be manoeuvred if required by the gun. Thus the workpiece to be machined is located under the electron beam and. Optimization of bead geometry in electron beam welding using a genetic. The electron beam polishing equipment technology is brought forward and its characteristic is explained because general processing method cant obtain preferable machining efficiency and product. A wide variety of electron beam machine options are available to you, there are 671 suppliers who sells electron beam machine on, mainly located in asia.
Electron beam machining ebm and laser beam machining lbm are thermal processes considering the mechanisms of material removal. Capability of making very small holes and slots with high pre. The influence of the input parameter in case of electron. Electron beam eb machining is a powerful method for micro and nanofabrication because the beam can be focused to a diameter of the order of a few nanometers. Electron beam technology is used worldwide with an increasing tendency. Depending upon the intensity of heating the workpiece can melt and vaporize. Thus the workpiece to be machined is located under the electron beam and is kept under vacuum. Pdf fundamentals and applications of micro and nano.
For example in laser jet machining, machining is carried out by laser beam. Sharma, department of mechanical engineering, iit roorkee. The electron beam melting is a process applied in case of some electron beam machining methods. Noone has more experience or expertise in the application of electron beam welding than electron beam processes. Yunitha ratnadilla tri adhi kusuma 1560tk37951 electron beam machining a. Generally electron beam machining is done in a high vacuum chamber to avoid the unnecessary scattering of the electrons. Electron beam machining process electron beam is generated in an electron beam gun. Joining of materials indian institute of technology guwahati. Contact electron beam engineering, electron beam engineering provides services throughout the u. In a vacuum chamber, a beam of highvelocity electrons is focused on a workpiece. Electronbeam machining ebm ebm equipment equipment is contained in vacuum 104 mm hg or more in order to ensure cutting energy. This process is used in many applications, including drilling, cutting, annealing, and welding. Electron beam machining ebm electron beam machining is a thermal nontraditional process, uses electrical energy to generate thermal energy for removing material. This aspect ratio coupled with the our high drilling speeds is what distinguishes this.
In this study electron beam machining process is used. A pulsating stream of highspeed electrons produced by a generator is focused by electrostatic and electromagnetic fields to concentrate energy on a very small area of work. Nontraditional machining the definitive guide machinemfg. Electron beam machining is same as laser beam machining process in which except laser, high speed electron beam impinges on work piece.
Nanopore formation by lowenergy focused electron beam machining this article has been downloaded from iopscience. Otherwise the electrons would interact with the air molecules, thus they would loose their energy and cutting ability. Experimental setup the electron beam machine used was 80kv and 12kw was facilitated by steel technology centre stc, iit kharagpur. Laser beam machining lbm is a thermal energy based advanced machining process in which the material is removed by i melting, ii vaporization, and iii chemical degradation chemical bonds are broken which causes the materials to degrade. An electron beam is a versatile tool whose effect is primarily based on a shortduration, localized input of heat into a substrate material. Through introduction of the principle and characteristics of electron beam machining technology, the application status and application instance of electron beam in research of materials science and materials processing in recent years were introduced in detail.
In this operation, electric arc is used to produce heat energy and the base metal is. Lecture series on manufacturing processes ii by prof. It is a nontraditional machining process in which no physical tool is used. Jul 16, 2015 page 1 module 9 non conventional machining version 2 me, iit kharagpur page 2 module 9 non conventional machining version 2 me, iit kharagpur lesson 40 electron beam and laser beam machining version 2 me, iit kharagpur page 3 module 9 non conventional machining version 2 me, iit kharagpur lesson 40 electron beam and laser beam machining version 2 me, iit kharagpur instructional objectives i. Nontraditional machining mechanical engineering, iitb. Feb 06, 2016 the electron beam traveling at a speed of. Electron beam machining ebm is a process where highvelocity electrons concentrated into a narrow beam are directed toward the work piece, creating heat and vaporizing the material. Optimisation of machining parameters for microelectrochemical machining. Ebm can be used for very precise cutting or boring of a wide variety of metals. Nanopore formation by lowenergy focused electron beam. Electrons escapes from the hot surface and a voltage of 50 to 200 kv helps to accelerate them. Electron beam machining free download as powerpoint presentation. Mohit ostwal assistant professor department of mechanical engineering jodhpur institute of engineering and technology, jodhpur 3282016 er. Electron beam for performingvarious fabricationtasks.
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