Applications 1 processing of all kinds of materials like plastic,leather,cork etc. Parametric analysis of cutting parameters for laser beam. Depending upon the intensity of heating the workpiece can melt and vaporize. Nov 26, 2012 electron beam machining compilation michael starks. In ibm a stream of charged atoms ions of an inert gas, such as argon, is accelerated in a vacuum by high energies and directed toward a solid workpiece. Derived from the early scanning electron microscopes, the technique in brief. Define advantage and disadvantage of electron beam. Electron beam machining ebm is a metal removal process by a high velocity focused stream of electrons. A laser pulse is called as ultrashort pulse when the thermal diffusion depth 4 a t where a is the thermal diffusivity and t is the diffusion time is equal to or less than the optical penetration depth. In electric discharge machining process an arc is produced when two currentcarrying wires are shortcircuited. As the electrons strike the work piece with high velocity, their kinetic energy is transformed into thermal energy which melts and vaporizes the material. Absence of mechanical contact between work piece and tool. Advanced welding processes details of electron beam. Electron beam machining is same as laser beam machining process in which except laser, high speed electron beam impinges on work piece.
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. Control parameters optimization of laser beam machining. Nptel mechanical engineering advanced machining processes. The construction and working principle of the electron beam gun would be discussed in the next section. Electron beam, laser beam and plasma arc welding studies by c. Yunitha ratnadilla tri adhi kusuma 1560tk37951 electron beam machining a. Laser beam machining lbm using long pulses has been used since long by focusing laser beam to a selective portion of material to create a desired feature on or internal to the substrate. The ebm technique is used for cutting fine holes and slots in any material. The research situation of the previous various electron beam machining methods and applications was discussed, and the various. 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. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses, youtube iit videos nptel courses. Mar 28, 2016 introduction ebm electron beam machining ebm is a thermal material removal process that utilizes a focused beam of highvelocity electrons to perform highspeed drilling and cutting.
Even today, new applications are being developed and used industrially, especially where other beam processes reach their limits. The workpiece in electron beam machining is held in a. Lecture series on manufacturing processes ii by prof. Chapter 1 electron beam lithography national chiao tung. 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. The source of water vapor is either residual gas in the vacuum chamber or. Ebm can be used for very precise cutting or boring of a wide variety of metals.
Jan 06, 2015 electron beam machining process electron beam is generated in an electron beam gun. Surface finish is better and kerf width is narrower than those for other thermal cutting processes. Electron beam welding componentsupgrades at precision. 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. Directwrite electron beam machines operate directly from design data and are capable of submicrometer pattern definition. In this article we will discuss about the meaning and characteristics of electron beam machining ebm in industries.
Electron beam, plasma beam and ion beam machining youtube. A wide variety of electron beam machine options are available to you, such as coating, substrate, and type. A detailed notes on electron beam machining process, and surely helps you. A wide variety of lasers, which provide wavelengths from deep. The main goal is to give to new comers a clear and efficient overview of the domain. The electron beam is a flow of electrons with energy. Electron beam welding electron beam engineering, inc. Sharma, department of mechanical engineering, iit roorkee. Jul 16, 2015 may 02, 2020 electron beam and laser beam module 9 non conventional machining lesson 40 electrical engineering ee notes edurev is made by best teachers of electrical engineering ee. Ion beam machining is an important nonconventional manufacturing technology used in micronanofabrication, using a stream of accelerated ions to remove the atoms on the surface of the object. Even today, new applications are being developed and used industrially, especially where. The left image represents the desired pattern, while. Electron beam machining is a nonconventional machining process or nontraditional process.
Ibm can be classified into two main categories, that is, largearea ion beam machining libm technology and focused ion beam. 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. Control parameters optimization of laser beam machining using. The most common ion beams are of singlycharged ions. Farrel company division, usm corporation, ansonia, conn. In this process, the material is removed with the help of a high velocity travelling at half the speed of light, i. Nanopore formation by lowenergy focused electron beam.
This process is used in many applications, including drilling, cutting, annealing, and welding. Ion beam machining machine tool technology britannica. The kinetic energy of the electrons, upon striking the workpiece, changes to heat, which vaporizes. Capability of making very small holes and slots with high pre. Electron beam machining ebm kcg college of technology. This machining method electron beam machining is based on the physical and chemical effects generated at the contact with the surface of the workpiece by a beam of electrons accelerated and directed to certain zones of the workpiece.
Function is to generate, shape and deflect the electron beam to drill or machine the workpiece. Mar 11, 2016 applications of electric discharge machining process. Electron beam welding process, applications and equipment dr. Nptel syllabus advanced machining processes video course course outline this course on advanced machining processes is also known as unconventional machining processes, modern machining processes, and new technology. Electron beam machining ebm and laser beam machining lbm are thermal processes considering the mechanisms of material removal. Education is strength in this video we can learn electron beam machining and advantages of electron beam machining, applications of electron beam machining. Laser beam machining lbm is one of the advanced machining processes which are used for shaping almost whole range of engineering materials. Lecture 17 electron beam machining ebm edit lesson digimat. Electron beam and laser beam module 9 non conventional.
It is a nontraditional machining process in which no physical tool is used. Hello everyone welcome to engineers academy topics covered. It deals with the latest machining processes named as. Ion beams have many uses in electronics manufacturing principally ion implantation and other industries. Electronbeam 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. Electron beam technology is used worldwide with an increasing tendency.
Introduction electron beam lithography is a specialized technique for creating extremely fine patterns 50 nm. Laser beam machining lbm, response surface methodology rsm, genetic algorithm ga, optimization. Electron beam machining ebm methods machining engineering. Electron beam machining is required to be carried out in vacuum. The beam removes atoms from the workpiece by transferring energy and momentum to. Electron beam and plasma welding processes youtube. May 02, 2020 electron beam and laser beam module 9 non conventional machining lesson 40 electrical engineering ee notes edurev is made by best teachers of electrical engineering ee. Mechanical engineering assignment help, define advantage and disadvantage of electron beam machining, define advantage and disadvantage of electron beam machining advantage 1.
An ion beam is a type of charged particle beam consisting of ions. Electron beam machining the process and its applications. Oct 29, 2017 education is strength in this video we can learn electron beam machining and advantages of electron beam machining, applications of electron beam machining. Electron beam welding process applications and equipment. Manufacturing processes i nptel online videos, courses. Introduction laser beam machining lbm is a novel thermal energy based advanced machining process which can be used for machining a wide range of materials. Paul,department of mechanical engineering, iit kharagpur. How electron beam machining works engineers academy. A comparison of focused ion beam and electron beam induced. Various lbm process commonly used are laser beam drilling lbd, laser beam cutting lbc, laser beam turning lbt and laser beam grooving lbg. 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. In lbmm both short and ultrashort laser pulses obtained from gas or solid lasers are used for selective removal of material. 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. Electron beam machining 1 is a metal removing process where high velocity.
In the electron beam machining process, a high velocity focused beam of electrons are used to remove the metal from the workpiece. At electron beam processes, we have 11 cnc and 5 conventional machines and extensive experience working with high strength materials. In electron beam machining, as the electrons strikes the work piece. Banas united aircraft research laboratories i summary a direct comparison was made of electron beam, laser beam and arc welding processes in ti6alw alloy in nominal thicknesses of 0. Electron beam machining can machine metallic as well as nonmetallic workpiece.
In this research work, the effect of process parameters such as cutting speed. Way more information than you ever wanted on how to fell a tree. Electron beam machining process electron beam is generated in an electron beam gun. This will generate high heat energy and melts and vaporize metal from work piece. Ionbeam machining of millimeter scale optics prashant m. This document is highly rated by electrical engineering ee. The applications of the electron beam machining technology in. Electrochemical machining ecm electro discharge machining edm electron beam machining ebm laser beam machining lbm processes 2. Introduction to electron beam lithography bostjan bercic bostjan. About 5% of these are metal coating machinery, 1% are spot welders, and 1% are laser welders. Based on his work experience, francis martin talk explain the various type of electron beam and xray equipment. Types of ebeam machines scanning systems single beam system multiple beam system vector raster vector raster hybrid systems shaped beam character projection parallel exposure systems photocathode projection eimage projection flys eye lens projection pattern information is. A variety of ion beam sources exists, some derived from the mercury vapor thrusters developed by nasa in the 1960s.
Electron beam machining ebm diagram, working, advantages. Other articles where ion beam machining is discussed. Major applications of laser beam is in cutting of metals and non metals, soft. Other articles where electronbeam machining is discussed. Lecture 17 electron beam machining ebm edit lesson. In lbm, surface roughness is one of important response which affects the quality characteristics of product. Otherwise the electrons would interact with the air molecules, thus they would loose their energy and cutting.
Introduction ebm electron beam machining ebm is a thermal material removal process that utilizes a focused beam of highvelocity electrons to perform highspeed drilling and cutting. Machining processes have existed for a long time but it was only after the scientific study of these processes which started some fifty years ago that major improvements in tool design, tool materials and machining techniques where brought about. Edm machining process is also known as spark erosion machining. In this video we have explained working of electron beam machining process. Parameters controlled for an eb welder can be beam current, filament current, beam focus, high voltage, and deflection, along with all the of mechanical axes. The process variables control electron beam power for an eb welder or arc and wire transfer for a fusion welding system.
In this paper, the dependence of the deposition rates versus the beam parameters for both, ion beam and electron beam induced. Introduction electron beam machining is one of the examples. Laser beam machining latst authorstream presentation. In this process, a laser beam is focused for melting and vaporizing to. Electron beam machining free download as powerpoint presentation. So, due to this, edm is particularly useful in machining of small holes, orifices, slots in diesel fuel injection nozzles, airbrake valves and aircraft engines etc. Electron beam machining is a thermal process used for metal removal during the machining process. Nanotechnology 21 2010 375301 p s spinney et al figure 1. In this paper, the dependence of the deposition rates versus the beam parameters for both, ion beam and electron beam induced deposition were investigated and compared with each other.
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. Abstract electron beam is generated in an electron beam gun. In the electrical beam machining, electrical energy is used to generate the electrons with high energy. Notes on electron beam machining ebm me mechanical. Further, the beam needs to be manoeuvred if required by the gun. The applications of the electron beam machining technology. Lbm is one of the advanced machining processes which are used for shaping almost whole range of engineering materials. The cathode is generally made of tungsten or tantalum. Bifano an ionbeam microcontouring process is developed and implemented for. Nov 04, 20 based on his work experience, francis martin talk explain the various type of electron beam and xray equipment.
Types of ebeam machines scanning systems single beam system multiple beam system vector raster vector raster hybrid systems shaped beam character projection parallel exposure systems photocathode projection eimage projection flys eye lens projection pattern information is stored in masks high throughput less expensive. Advanced casting processes metal mould casting continuous casting squeeze casting vacuum mould casting evaporative pattern casting ceramic shell casting 6 3. The electron beam as a tool is the business basis of all company units of global beam technologies ag. This book is an attempt to consolidate the basic scientific studies in the machining area so that fundamental mechanics and other concepts. Hence, it was realize to develop some nonconventional machining methods known as advanced machining processes. Electron beam gun provides high velocity electrons over a very small spot size.
Ion beams machining ibm is an important nonconventional manufacturing technology hellborg et al. Mar 17, 2016 electron beam machining ebm is a thermal process. The light produced is a coherent, monochromatic and collimated beam which can be focused to small spots of diameter of 0. During this machining process, a small portion of metals is also eroded away, leaving a small cater. Electron beam machining electron cathode free 30day. Nternational sciences and ngineering ol o eptember finite. This document is highly rated by electrical engineering ee students and has been viewed 739 times. Major applications are integrated circuit design edit, prototype modification, repair of masks, and machining of microsystems.
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