In electro chemical machining an electrolyte acts as a current carrier. 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. In an electron beam machining, the electrons strike the. Jun 10, 2017 electro chemical machining consists of following basic elements. Oct 23, 2008 lecture series on manufacturing processes ii by prof. In this article we will discuss about the meaning and characteristics of electron beam machining ebm in industries. Electronbeam machining ebm the ebm technique is used for cutting fine holes and slots in any material. Plasma arc machining process, diagram, application, advantages and disadvantages introduction. Define advantage and disadvantage of electron beam machining. Contact electron beam engineering, electron beam engineering provides services throughout the u. In this machining process metal is removed by melting and vaporization of metal particle from surface of work piece. The beam removes atoms from the workpiece by transferring energy and momentum to.
Electron beam welding experts electron beam processes. Machine tool, any stationary powerdriven machine that is used to shape or form parts made of metal or other materials. Machine tools were among the innovations that made mass production and interchangeable parts realities in the 19th century. 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 is a process where highvelocity electrons concentrated into a narrow beam are directed toward the work piece, creating heat and vaporizing the material. Sharma, department of mechanical engineering, iit roorkee. 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. Electro chemical discharge machining ecdm laser beam machining lbm equipment and process parameters in lbm electrochemical machining ecm ecm kinematics and tool design the. Diy brick rocket stove cooking without electrical power duration.
Electron beam and plasma welding processes youtube. When this high velocity electron strikes the workpiece, it melts and vaporizes the material from the workpiece. An electron applicator or electron cone which provides added collimation of the beam. This course covers lessons in tool geometry, mechanism of chip formation, orthogonal and oblique cutting, cutting temperature, control of cutting temperature and cutting fluid application, advanced tool. Learn more about the tools, including the various types. Apr 08, 2017 electron beam machining is process in which high velocity electrons are concentrated in a narrow beam and then directed towards the workpiece for machining. Method of laser beam machining lbm industrial engineering. Known by many names, powder bed melting is currently the most common type of metal 3d printing. Laser beam machining is a thermal machining process which uses laser beam to produce heat. Electro discharge machining edm electron beam machining ebm laser beam machining lbm processes 2.
Live simple, live free tinyhouse prepper recommended for. Electron beam machining is same as laser beam machining process in which except laser, high speed electron beam. This is a different process from electric discharge, electron beam, laser beam and plasma arc machining. 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. Due to its improved weld quality and increased weld. Conclusion in the latest field of technology respect to welding and machining, plasma arc welding and machining have a huge success. Lecture video 18 of advanced machining processes course by prof vijay k.
The beam crosssection is then focused and directed. This course covers lessons in tool geometry, mechanism of chip formation, orthogonal and oblique cutting, cutting temperature, control of cutting temperature and cutting fluid application, advanced tool materials, abrasive process, gear manufacturing, electro chemical machining, electro discharge machining, electron beam machining and laser. Advanced casting processes metal mould casting continuous casting. Laser beam machining an overview sciencedirect topics. In this process, the material is removed with the help of a high velocity travelling at half the speed of light, i. 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. Here a steam of high speed electrons impinges on the work surface so that the kinetic energy of electrons is transferred to work. Today we will learn about laser beam machining principle, working, equipments, application, advantages and disadvantages with its diagram. Capability of making very small holes and slots with high precision, in a short time in any material. Located at the same premises as ebe, our associate company, electron beam engineering services ebes provides electron beam welding and laser beam. It is a nontraditional machining process in which no physical tool is used. Electron beam machining basic terms and working duration.
Electron beam, plasma beam and ion beam machining video. Notes on electron beam machining ebm me mechanical. Abrasive jet machining ajm water jet cutting wjc and abrasive water jet machining awjm magnetic abrasive finishing maf and its modelling 3. Abrasive flow finishing aff and its modelling magnetorheological finishing mrf nptel. Electron beam machining is a process in which highvelocity electrons are concentrated into a narrow beam with a very high planar power density. Electron beam machining ebm is a metal removal process by a high velocity focused stream of electrons. Laser beam machining lbm is a non conventional machining manufacturing process, a form of machining, in which a laser is directed towards the work piece for machining. Further, the beam needs to be manoeuvred if required by the gun. Electron beam machiningbasic terms and working duration. In ibm a stream of charged atoms ions of an inert gas, such as argon, is accelerated in a vacuum by high. The applications of the electron beam machining technology.
A hot cathode emits electrons, which are accelerated towards an anode, passing through an aperture to reach the accelerating waveguide. Laser beam is focussed for melting and vaporizing the unwanted material from the parent material. Nov 17, 2014 advanced manufacturing processes by dr. The background of nanomachining processes, including typical machining operations such as turning, milling and grinding and different. Mar 30, 2017 today we will learn about laser beam machining principle, working, equipments, application, advantages and disadvantages with its diagram. Plasma arc machining process, diagram, advantages and. Lecture 17 electron beam machining ebm edit lesson. Function is to generate, shape and deflect the electron beam to drill or machine the workpiece. Electrochemical machining ecm is a machining process in which electrochemical process is used to remove materials from the workpiece. Electron beam machining ebm kcg college of technology. Introduction to advanced machining processes and their classification ultrasonic machining and its modelling and analysis 2. During this machining process, a small portion of metals is also eroded away, leaving a small cater. As the electrons strike the work piece with high velocity, their kinetic.
Electron beam, plasma beam and ion beam machining youtube. 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. The electron beam as a tool is the business basis of all company units of global beam technologies ag. It is similar to the electron beam welding machine. These machines distribute a fine layer of powder over a build plate and selectively melt a cross section. May 12, 2017 electrochemical machining ecm is a machining process in which electrochemical process is used to remove materials from the workpiece. Laser welding has four times the productivity of electron beam welding, and the capital cost of laser equipment is about half that of a comparable electron beam welding setup. In electron beam machining, as the electrons strikes the work piece.
In electric discharge machining process an arc is produced when two currentcarrying wires are shortcircuited. Ppt laser beam machining lbm powerpoint presentation. Ultrasonic machining, water jet machining, abrasive water jet machining. Electron beam welding ebw is a machine controlled process carried out in a vacuum chamber. Electron beam diameter d is a major factor in all aspects of electron microscopes, including tem, stem, and sem imaging, where we use a fine focused beam. Laser welding has four times the productivity of electron beam welding, and the capital cost of laser equipment is about half that of a comparable electron beam. Ion beam machining is generally a surface finishing process in which the material removal takes place by sputtering of ions. Other articles where ion beam machining is discussed. Electron beam machining is process in which high velocity electrons are concentrated in a narrow beam and then directed towards the workpiece for machining.
Noone has more experience or expertise in the application of electron beam welding than electron beam processes. Besides, the maintenance costs of a laser system are less than that of the electron beam welding. Electron beam machining ebm and laser beam machining lbm are thermal processes considering the mechanisms of material removal. Say for example and in a configuration where electrons are there in different cells.
Lecture series on manufacturing processes ii by prof. Now, if this electron, this electrons are supplied with some additional energy. In a vacuum chamber, a beam of highvelocity electrons is focused on a. Paul,department of mechanical engineering, iit kharagpur. May 31, 2018 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. Plasmaarc machining pam employs a highvelocity jet of hightemperature gas to melt and displace.
The workpiece in electron beam machining is held in a. The beam crosssection is then focused and directed toward the work piece, creating heat and vaporizing the material. 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. This will generate high heat energy and melts and vaporize metal from work piece. Electronbeam machining is a kind of machining process by using highvelocity electron beam.
Electron beam machining is same as laser beam machining process in which except laser, high speed electron beam impinges on work piece. Even today, new applications are being developed and used industrially, especially where other beam processes reach their limits. In ebm, electrons are accelerated to high velocity as half of the light speed, then it is impinged to. Electron beam, plasma beam and ion beam machining tutorial of advanced manufacturing processes course by prof a. Such processing is carried out utilizing the energy of coherent photons or laser beam, which is mostly converted into thermal energy upon. Electron beam machining ebm methods machining engineering. Wire cut edm, also known as wire electrical discharge machining, or wire edm is a method of cutting or shaping conductive materials with a thin electrode that follows a precisely programmed path. 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. Many metals, including iron, will oxidize, rust, or even burn when heated to a high temperature in a normal. This process uses thermal energy to remove material from metallic or nonmetallic surfaces. Lecture 40 electron beam machining and laser beam machining. Mar 17, 2016 electron beam machining ebm is a thermal process.
Nontraditional machining and thermal cutting processes. Ebm can be used for very precise cutting or boring of a wide variety of metals. Nov 05, 2014 laser beam machining used light energy from a laser to remove material by vaporization and ablation energy is concentrated optically laser emits either continuous or pulsed light beam 5 source. The two electrodes workpiece and tool is immersed in an electrolyte such as nacl. The applications of the electron beam machining technology in. Mar 31, 2017 it is a nontraditional machining process in which no physical tool is used. Learn vocabulary, terms, and more with flashcards, games, and other study tools. 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. Dec 07, 2016 electron beam machining is a kind of machining process by using highvelocity electron beam.
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. Part 2 deals with thermal machining processes for example, electric discharge machining, laser beam machining, electron beam machining, etc. Electronbeam machining is a process in which highvelocity electrons are concentrated into a narrow beam with a very high planar power density. 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. In the process, workpiece is taken as anode and tool is taken as cathode. A detailed notes on electron beam machining process, and surely helps you. Ion beam machining machine tool technology britannica. A focused beam of electrons, velocity approaching 0. 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. Advanced manufacturing processes online course video. The electrolyte in ecm should have high electrical conductivity, low viscosity, high specific heat, chemical stability, resistance to form a passivating film on the workpiece surface, non.
Laser beam machining or more broadly laser material processing deals with machining and material processing like heat treatment, alloying, cladding, sheet metal bending etc. About 5% of these are metal coating machinery, 1% are spot welders, and 1% are laser welders. Electron beam welding is so clever that many people dont appreciate its potential. 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. Nptel syllabus advanced manufacturing processes web course course outline the course covers the details of the advanced machining. 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. Electron beam technology is used worldwide with an increasing tendency. Electron beam machining, this was first reported by steigerwald in 1947, who designed a prototype of this particular machine. Laser beam machining lbm is an excellent material processing technique to machine a wide range of advanced materials, especially difficulttomachine advanced ceramics and composites. Electron beam machining free download as powerpoint presentation. Depending upon the intensity of heating the workpiece can melt and vaporize. Notes on electro chemical machining ecm me mechanical. Electron beam equipment eb welding machines electron beam. It also includes micronanofinishing processes viz, abrasive flow finishing, magnetic abrasive finishing, etc.
The cathode is generally made of tungsten or tantalum. 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. Both wellestablished techniques, such as nanomachining ultraprecision and new trends in improving nanoprocesses taking into account afm, laser beam machining, electron beam machining processes are overviewed. Electron beam equipment eb welding machines electron. Absence of mechanical contact between work piece and tool. Electron beam machining ebm electron beam machining is a thermal nontraditional process, uses electrical energy to generate thermal energy for removing material. A wide variety of electron beam machine options are available to you, such as substrate, type. Electron beam machining definition electron beam machining ebm is a process where high velocity electrons concentrated into a narrow beam are directed toward the work piece. Electron beam machining can be used to accurately cut or bore a wide variety of metals.
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