Pdf on electron beam machining electron beam machining ebm and laser beam machining lbm are thermal processes considering the mechanisms of material removal. Electron beam machining is same as laser beam machining process in which except laser, high speed electron beam impinges on work piece. At electron beam processes, we have 11 cnc and 5 conventional machines and extensive experience working with high strength materials. Electron beam gun provides high velocity electrons over a very small spot size. Electron beam welding process, applications and equipment.
Electron beam machining ebm methods machining engineering. The mechanism of material removal is primarily by melting and rapid vaporisation. 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 technology is used worldwide with an increasing tendency. In this process, the material is removed with the help of a high velocity travelling at half the speed of light, i. Nternational sciences and ngineering ol o eptember finite. Nptel gate courses for electronics and communication. The material there is heated and melted, burned, blown away by stream or vaporized and removed by different methods. Nanopore formation by lowenergy focused electron beam machining this article has been downloaded from iopscience. Education is strength in this video we can learn electron beam machining and advantages of electron beam machining, applications of electron beam machining. It deals with the latest machining processes named as advanced machining processes.
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. The kinetic energy of the electrons, upon striking the workpiece, changes to heat, which vaporizes read more. Nptel mechanical engineering manufacturing processes ii. Hydrophila as well as salmonella, campylobacter and e. In electron beam machining, as the electrons strikes the work piece. When this high velocity electron strikes the workpiece, it melts and vaporizes the material from the workpiece. Nov 04, 20 based on his work experience, francis martin talk explain the various type of electron beam and xray equipment. In this article you will know about electron beam machining. Nanopore formation by lowenergy focused electron beam machining.
Our headquarters and manufacturing facility is conveniently located in the midwestern united states. Electron beam machining is the metal removal process by a highvelocity focussed stream of electrons which heats, melts and vaporizes the work material at the point of bombardment the production of free electrons is obtained from thermoelectronic cathodes wherein metals are heated to the temperature at which the electrons gain enough speed for escaping to the space around the cathode. Lbm is one of the advanced machining processes which are used for shaping almost whole range of engineering materials. Nptel online videos, courses iit video lectures well organized. Mar 17, 2016 electron beam machining ebm is a thermal process. The use of ionizing radiation to treat food products is a technology which has existed for almost 40 years. In this video we have explained working of electron beam machining process, we have seen the working principle, equipments used. The beam crosssection is then focused and directed toward the work piece, creating heat and vaporizing the material. 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. Absence of mechanical contact between work piece and tool. Abstract electron beam is generated in an electron beam gun. Control parameters optimization of laser beam machining using. 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. The main goal is to give to new comers a clear and efficient overview of the domain.
Electron beam machining, this was first reported by steigerwald in 1947, who designed a prototype of this particular machine. Mar 11, 2016 in electric discharge machining process an arc is produced when two currentcarrying wires are shortcircuited. Note that all manufacturing must take place under vacuum to properly operate the electron 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. Electron beam equipment eb welding machines electron beam. 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. Otherwise the electrons would interact with the air molecules, thus they would loose their energy and cutting. Electron beam machining process electron beam is generated in an electron beam gun.
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. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses, youtube iit videos nptel courses. It is similar to the electron beam welding machine. It is a nontraditional machining process in which no physical tool is used. The influence of the input parameter in case of electron. The construction and working principle of the electron beam gun would be discussed in the next section. Beam technologies are noforce manufacturing processes. In this article we will discuss about the meaning and characteristics of electron beam machining ebm in industries. Laser beam machining lbm is a novel thermal energy based advanced machining process which can be used for machining a wide range of materials. View electron beam machining ppts online, safely and virusfree. 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. An electron gun bombards the workpiece with electrons up to 80 per cent the speed of light generating localized heat and evaporating the workpiece surface.
Such processes include ion beam machining ibm, focused ion beam fib machining and plasma discharge machining. Nptel video lectures, iit video lectures online, nptel. Laser beam machining lbm, response surface methodology rsm, genetic algorithm ga, optimization. Nonconventional methods of machining are used for many engineering applications where the traditional processes fail to be costeffective. Nov 26, 2012 diy brick rocket stove cooking without electrical power duration.
Control parameters optimization of laser beam machining. Electron beam, plasma beam and ion beam machining youtube. 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. Typical applications are, annealing welding metal removal. Laser beam is appropriate for microtechnology due to its high lateral resolution, low heat input, and high flexibility. For this reason, it is important to better know the characteristics of the. Electron beam machining the basic physics is an electron beam is directed towards a work piece, the electron heat and vaporize the metal. This we are going to discuss ion implantation and surface modification specifically during the ion beam machining and deposition of the materials with the help of. Focused ion beam machining of hard materials for micro. During this machining process, a small portion of metals is also eroded away, leaving a small cater.
This article provides a description of equipment used for ebm and discusses the process characteristics, applications, advantages, and disadvantages of electron beam drilling. Live simple, live free tinyhouse prepper recommended for you. 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. An ion beam is a type of charged particle beam consisting of ions. Today we shall discuss about a new process which is called laser beam. Nptel provides elearning through online web and video courses various streams. Now electron beam machining is mostly done in the vacuum atmosphere for the very simple reason i will show you, suppose vacuum is there you will get as. Major applications of laser beam is in cutting of metals and non metals, soft. Nptel mechanical engineering video lecture online study. 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. Ion beam, focused ion beam, and plasma discharge machining.
Lecture series on design of machine elements i by prof. In some cases, it may be necessary to heat the part in an oven for several hours to release the stresses induced by the manufacturing process. Jul 16, 2015 electron beam and laser beam module 9 non conventional machining lesson 40 electrical engineering ee notes edurev notes for electrical engineering ee is made by best teachers who have written some of the best books of electrical engineering ee. Electron beam machining ebm is a metal removal process by a high velocity focused stream of electrons. Notes on electron beam machining ebm me mechanical. The electrons are accelerated from the source with highvoltage potential between a cathode and anode. Function is to generate, shape and deflect the electron beam to drill or machine the workpiece. The heat energy so produced is used to melt and vaporize the materials from the wp. Manufacturing processes i nptel online videos, courses.
Hence, it was realize to develop some nonconventional machining methods known as advanced machining processes. Advanced casting processes metal mould casting continuous casting squeeze casting. Electron beam machining ebm uses a focused beam of highvelocity electrons to remove material. A wide variety of electron beam machine options are available to you, such as steel, glass. Hello everyone welcome to engineers academy topics covered. Magnetic lenses focus the electron beam, and electromagnetic coils control its position. This paper provides a technical overview of the unique features of the electron beam welding process including several applications. The electron beam is a flow of electrons with energy. Focused ion beams has become finest possible drill machine ever possible and it can create of the smallest brick as structural element. 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. In ebm, electrons are accelerated to high velocity as half of the light speed, then it is impinged to. As the electrons strike the work piece with high velocity, their kinetic energy is transformed into thermal energy which melts and vaporizes the material. Design of machine elements nptel online videos, courses. All of our bulk welding products are made at our location in kankakee, illinois, and are available for shipment from stock.
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. The beam removes atoms from the workpiece by transferring energy and momentum to. 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. Pradhan2 1 mechanical engineering department, smit, sikkim, india. Additive manufacturing technologies 20 electric discharge machining 439 electroforming 443 electron beam machining 446 electroplating 452 etching 483 eutectic bonding 488 induction heating 692 ion beam machining 717 laser ablation 736 laser beam machining 739 microwave radiation 877 physical vapor deposition pvd. Beam technologies principle the beam consist of particles that bring energy to the point of action. The applications of the electron beam machining technology in. 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. 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. Depending upon the intensity of heating the workpiece can melt and vaporize. As the electron strikes the workpiece, the kinetic energy of the electron changes into heat energy.
Nptel syllabus advanced manufacturing processes web course course outline the course covers the details of the advanced machining. Surface finish is better and kerf width is narrower than those for other thermal cutting processes. Conjugate beam method nptel pdf haunched beams, and framed bents may be computed by a procedure. Weld cross sections of production parts will be shown to demonstrate obtainable weld shapes.
In an electron beam machining, the electrons strike the workpiece with a high velocity. Electronbeam machining can be used to accurately cut or bore a wide variety of metals. Other articles where ion beam machining is discussed. Electron beam machining is required to be carried out in vacuum. The complete guide to electron beam melting ebm in 3d. Dec 07, 2016 electron beam machining is a kind of machining process by using highvelocity electron beam. The electron beam gun has a tungsten filament, which is heated, freeing electrons. The electron beam as a tool is the business basis of all company units of global beam technologies ag. In a vacuum chamber, a beam of highvelocity electrons is focused on a workpiece. The workpiece in electron beam machining is held in a.
Electronbeam machining ebm the ebm technique is used for cutting fine holes and slots in any material. 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. Jan 06, 2015 electron beam machining process electron beam is generated in an electron beam gun. Pdf on electron beam machining pdf on electron beam machining pdf on electron beam machining download. 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. Control parameters optimization of laser beam machining using genetic algorithm ruben phipon1, b.
The postprinting steps can include machining of surfaces in contact with other parts, polishing, etc. Electron beam machining ebm kcg college of technology. 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. Electron beam machining ebm laser beam machining lbm processes 2. Chakraborty, department of mechanical engineering, iit kharagpur.
Design of machine elements design of machine elements. Liquid state welding are those welding processes in which, the metal to metal joint form in liquid or molten state. Electron beam machining ebm electron beam machining is a thermal nontraditional process, uses electrical energy to generate thermal energy for removing material. Electronbeam machining is a process in which highvelocity electrons are concentrated into a narrow beam with a very high planar power density. Welcome to the course on advanced machining process.
Electronbeam machining is a kind of machining process by using highvelocity electron beam. 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. Ebm can be used for very precise cutting or boring of a wide variety of metals. Ion beams have many uses in electronics manufacturing principally ion implantation and other industries. Laser beam machining lbm is one amongst the foremost widely used thermal energy based noncontact kind advance machining method which may be applied for nearly whole vary of materials. Capability of making very small holes and slots with high precision, in a short time in any material.
Electron beam machining working principle, advantage ebm. Sharma, department of mechanical engineering, iit roorkee. Today we will learn about electron beam welding, principle, working, equipments, application, advantages and disadvantages with its diagram. Basic electrical technology nptel online videos, courses. This process is used in many applications, including drilling, cutting, annealing, and welding. Diy brick rocket stove cooking without electrical power duration. This will generate high heat energy and melts and vaporize metal from work piece. Define advantage and disadvantage of electron beam machining. Electron beam welding is a liquid state welding process. Ebm and lbm are typically used with higher power density to machine materials. The mill time in minutes for each hole is superimposed on the hole figure 5. The stream of electrons passes through a hole in the anode. Electron beam is a member of the american welding society. Focused ion beam fib machining is one of the techniques for microfabrication of micro devices.
Nptel material is available for free on nptel website. In this process, a laser beam is focused for melting and vaporizing to. A variety of ion beam sources exists, some derived from the mercury vapor thrusters developed by nasa in the 1960s. Ion beam machining machine tool technology britannica. How electron beam machining works engineers academy. Electron beam machine process hanwha aerospace usa. Basic electrical technology nptel online videos, courses iit video lectures. Parametric analysis of cutting parameters for laser beam. Electron beam machining is process in which high velocity electrons are concentrated in a narrow beam and then directed towards the workpiece for machining. If you are not able to download lectures due to bandwidth constraints, you can obtain the courses in dvds by paying a nominal fee to cover the cost of storage media and distribution.
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