This is a different process from electric discharge, electron beam, laser beam and plasma arc machining. In this machining process metal is removed by melting and vaporization of metal particle from surface of work piece. Notes on electron beam machining ebm me mechanical. Electron beam equipment eb welding machines electron. Electron beam machining is same as laser beam machining process in which except laser, high speed electron beam.
The beam crosssection is then focused and directed. In ebm, first the electron is generated by the cathode and an annular biased grid does not allows the electron to diverge. Diy brick rocket stove cooking without electrical power duration. Laser beam machining lbm lecture 24 equipment and process parameters in lbm. The process of metal removal by electro chemical dissolution was known as long back as 1780 ad but it is only over the last couple of decades that this. Further, the beam needs to be manoeuvred if required by the gun. Micromachining is a material removal process in which. Electron beam machining, this was first reported by steigerwald in 1947, who designed a prototype of this particular machine. Live simple, live free tinyhouse prepper recommended for you.
Mar 30, 2017 today we will learn about laser beam machining principle, working, equipments, application, advantages and disadvantages with its diagram. 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. In a vacuum chamber, a beam of highvelocity electrons is focused on a. Electron beam and plasma welding processes youtube. 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. Kinetic energy of electrons heat rapid melting and vaporizing. A wide variety of electron beam machine options are available to you, such as substrate, type. Mar 17, 2016 electron beam machining ebm is a thermal process.
Part 2 deals with thermal machining processes for example, electric discharge machining, laser beam machining, electron beam machining, etc. Laser beam machining is a thermal machining process which uses laser beam to produce heat. Introduction to manufacturing processes lecture notes prepared by junlan wang associate professor of mechanical engineering university of washington figure courtesy. Electro chemical machining consists of following basic elements. It is widely used in cutting sheet and drilling holes. Singh, balbir singh modern machining processes presents unconventional machining methods which are gradually commercial acceptance. Now, if this electron, this electrons are supplied with some additional energy. Advanced welding processes details of electron beam welding ebw. It also includes micronanofinishing processes viz, abrasive flow finishing, magnetic abrasive finishing, etc. Advanced casting processes metal mould casting continuous casting squeeze casting vacuum mould casting evaporative pattern casting ceramic shell casting 6 3.
The highly focused, highdensity energy melts and evaporates portions of the workpiece in a controlled manner. Other articles where ion beam machining is discussed. Electron beam machining ebm thermal process, similar to lbm. 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. Electron beam machining is same as laser beam machining process in which except laser, high speed electron beam impinges on work piece. The beam crosssection is then focused and directed toward the work piece, creating heat and vaporizing the material. All aspects of mechanical, electrochemical and thermal processes are comprehensively covered. 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. Ion beam machining is generally a surface finishing process in which the material removal takes place by sputtering of ions. A detailed notes on electron beam machining process, and. From the annular bias grid, the electron produced by the cathode is attracted towards the anode and gradually its velocity increases. In abrasive jet machining, a focused stream of abrasive particles, carried by high pressure air or gas is made to impinge on the work surface through a nozzle and the. Some of the processes employed for hole making are electrodischarge machining, laser beam machining, electron beam machining, shaped. The applications of the electron beam machining technology in.
The applications of the electron beam machining technology. Ultrasonic machining, water jet machining, abrasive water jet machining. 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 jet machining ljm electron beam machining ebm 4. In electron beam machining, as the electrons strikes the work piece. The kinetic energy of the electrons, upon striking the workpiece, changes to heat, which vaporizes read more. Lecture series on manufacturing processes ii by prof.
The electron beam as a tool is the business basis of all company units of global beam technologies ag. Contact electron beam engineering, electron beam engineering provides services throughout the u. Electron beam machining ebm electron beam machining is a thermal nontraditional process, uses electrical energy to generate thermal energy for removing material. Sharma, department of mechanical engineering, iit roorkee. Nov 26, 2012 diy brick rocket stove cooking without electrical power duration. Electrochemical machining ecm seminar with pdf report. Here a steam of high speed electrons impinges on the work surface so that the kinetic energy of electrons is transferred to work. Define advantage and disadvantage of electron beam. Lecture 32 electrodischarge machining sytem lecture 33 effect of various parameters on edm process lecture 34 tool electrodes and dielectric fluids and electron beam machining lecture 35. The beam removes atoms from the workpiece by transferring energy and momentum to. Today we will learn about laser beam machining principle, working, equipments, application, advantages and disadvantages with its diagram. The cathode is generally made of tungsten or tantalum.
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. The process of metal removal by electro chemical dissolution was known as long back as 1780 ad but it is only over the last. In ebm, electrons are accelerated to high velocity as half of the light speed, then it is impinged to. This process uses thermal energy to remove material from metallic or nonmetallic surfaces. Electrochemical machining ecm electro discharge machining edm electron beam machining ebm laser beam machining lbm processes 2. 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. 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. Electron beam machining is a process in which highvelocity electrons are concentrated into a narrow beam with a very high planar power density. The introduction of abrasive to the fluid jet enhances the machining. This will generate high heat energy and melts and vaporize metal from work piece. Electronbeam 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 and laser beam machining lbm are thermal processes considering the mechanisms of material removal. Electronbeam machining is a kind of machining process by using highvelocity electron beam.
The power needed to operate the ecm is obviously electrical. Jun 10, 2017 electro chemical machining consists of following basic elements. 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 addition to making eb and laser welding equipment, ptr assists customers with weld process development and provides maintenance and spares support for electron beam welding systems. Ebm can be used for very precise cutting or boring of a wide variety of metals. 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. The two electrodes workpiece and tool is immersed in an electrolyte such as nacl. Laser beam is focussed for melting and vaporizing the unwanted material from the parent material. Laser beam machining an overview sciencedirect topics. 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. 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.
Electron beam technology is used worldwide with an increasing tendency. Some of the processes employed for hole making are electrodischarge machining, laser beam machining, electron beam machining, shaped tube. 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. It is a nontraditional machining process in which no physical tool is used. 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. 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.
Indian institute of technology kanpur national programme. About 5% of these are metal coating machinery, 1% are laser welders, and 1% are spot welders. A detailed notes on electron beam machining process, and surely helps you. Electron beam machining ebm thermal process, similar to. 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. Ppt laser beam machining lbm powerpoint presentation. 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. This process is used in many applications, including drilling, cutting, annealing, and welding. 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.
Electron beam machining free download as powerpoint presentation. In electro chemical machining an electrolyte acts as a current carrier. It is similar to the electron beam welding machine. Where, density of anode, volume of material removed from the anode in time t, x sectional area on the anode from which material is being removed in time t, is the thicknness of material removed in time t. Say for example and in a configuration where electrons are there in different cells. In the process, workpiece is taken as anode and tool is taken as cathode. Mechanical engineering assignment help, define advantage and disadvantage of electron beam machining, define advantage and disadvantage of electron beam machining advantage 1. Ion beam machining machine tool technology britannica. Laser beam can very easily be focused using optical lenses as their wavelength ranges from half micron to around 70 microns.
Electron beam machining electron beam machining drilling was first introduced in 1952 and ebw was introduced in industry in 1959. Electrochemical machining ecm is a machining process in which electrochemical process is used to remove materials from the workpiece. Paul,department of mechanical engineering, iit kharagpur. Mar 31, 2017 it is a nontraditional machining process in which no physical tool is used. In a vacuum chamber, a beam of highvelocity electrons is focused on a workpiece. A free powerpoint ppt presentation displayed as a flash slide show on id. Live simple, live free tinyhouse prepper recommended for. Depending upon the intensity of heating the workpiece can melt and vaporize. Located at the same premises as ebe, our associate company, electron beam engineering services ebes provides electron beam welding and laser beam. The workpiece in electron beam machining is held in a.
Electron beam machining can be used to accurately cut or bore a wide variety of metals. Electronbeam machining ebm the ebm technique is used for cutting fine holes and slots in any material. Dec 07, 2016 electron beam machining is a kind of machining process by using highvelocity electron beam. Laser beam machining lbm is an excellent material processing technique to machine a wide range of advanced materials, especially difficulttomachine advanced ceramics and composites. 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. Ebm thermal process, similar to lbm materialheating. Lbm, plasma arc machining pam and electron beam machining ebm. Manufacturing process technology part2 assignment 02 nptel. Lecture 32 electrodischarge machining sytem lecture 33 effect of various parameters on edm process lecture 34 tool electrodes and dielectric fluids and electron beam machining lecture 35 mechanics of electron beam machining process lecture 36 functional characteristics of ebm process edit lesson.
939 428 991 366 1584 601 606 875 986 1185 1469 980 1190 1304 1240 568 1487 587 591 1024 1645 1028 1016 1483 1630 559 1002 73 1589 1438 728 653 1174 502 1133 810 53 752 886 837 471 1000