An electron source i s capab le of suppl ying an abu ndance of free electrons conti nuously. This stream of electrons is then forced through a valve that controls the beam. 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. Presentations ppt, key, pdf logging in or signing up. Mechanism of material removal in electron beam machining ii.
Electrochemical machining ecm is a nontraditional machining process uses the principle of faraday to remove metal from the workpiece. Due to pattern of electrostatic field produced by grid cup, electrons are focused and made to flow in the form of a converging beam through anode. Electronbeam machining ebm is a process where highvelocity electrons concentrated into a narrow beam are directed toward the work piece, creating heat. Other articles where ion beam machining is discussed. Our new crystalgraphics chart and diagram slides for powerpoint is a collection of over impressively designed datadriven chart and editable diagram s guaranteed to impress any audience. Electron beam machiningebm free download as powerpoint presentation. 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. Electrochemical machining ecm ppt and seminar free download.
Ppt electron beam melting o doom powerpoint presentation, free. Laser beam machining is a thermal machining process which uses laser beam to produce heat. The electron beam melting and refining of metals is accomplished using electron beams as a heating source in a vacuum chamber with a vacuum pressure of 58. Electron beam machining has been used in industry since the 1960s, initially in. A free powerpoint ppt presentation displayed as a flash slide show on id. Wjm can be used to cut softer materials like plastic, rubber or wood. Electron beam machining ebm and laser beam machining lbm are thermal processes. The cathode is generally made of tungsten or tantalum. Electron beam melting and refining ebmr in a vacuum using an intense electron beam is a widely used, ecologicallyfriendly method. In this machining process metal is removed by melting and vaporization of metal particle from surface of work piece. Unconventional machining lecture 7 electron beam machining.
Electron beams for macro and micro welding applications. 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 elements necessary for generating free electrons, or cathode elements, and. In a vacuum chamber, a beam of highvelocity electrons is focused on a workpiece. View and download powerpoint presentations on electron beam machining ppt. 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 this technology was developed by arcam ab in sweden type of. 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. Ebm modules of electron beam gun cathode cartridgetungsten or tantalum high voltage supply bias grid. View and download powerpoint presentations on electrochemical grinding ppt. Special electron beam welding processes ptrprecision. The drilling process can obtain such small diameter holes down to 0.
Ppt laser beam machining lbm powerpoint presentation. Pdf electron beams for macro and micro welding applications. Ppt laser beam machining powerpoint presentation free to download id. Aim of the presentation give brief information about electro chemical machining process show the ecms working principles and tools define the advantages and disadvantages brief informations about application areas, economics, products and developments. As the electrons strike the work piece with high velocity, their kinetic energy is transformed into thermal energy which melts and vaporizes the material. The adobe flash plugin is needed to view this content. Advantage and disadvantage of electron beam machining. The beam crosssection is then focused and directed toward the work piece, creating heat and vaporizing the material. Electron beam machiningbasic terms and working duration. Electron beam machining has been used in industry since the 1960s, initially in nuclear and aerospace welding application. Electron beam melting ebm is one of the latest am techniques using a computercontrolled electron gun to create fully dense 3d objects directly from metal powder. The basic functions of any electron beam gun are to generate free electrons at the cathode, accelerate. Electron beam machining ebm invented in germany in 1952 by dr.
Electronbeam machining is a kind of machining process by using highvelocity electron beam. Electron beam machining ebm electron beam machining is a thermal nontraditional process, uses electrical energy to generate thermal energy for removing material. Laser beam is focussed for melting and vaporizing the unwanted material from the parent material. The power needed to operate the ecm is obviously electrical. Chart and diagram slides for powerpoint beautifully designed chart and diagram s for powerpoint with visually stunning graphics and animation effects. Singh, balbir singh modern machining processes presents unconventional machining methods which are gradually commercial acceptance. Ebm is a highenergy beam machining process electrical energy is used to generate highenergy electrons the mechanism of material removal is primarily by melting and rapid vaporization due to intense heating by the electrons. 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.
Education is strength in this video we can learn electron beam machining and advantages of electron beam machining, applications of electron beam machining. This page contains micromachining seminar and ppt with pdf report. Aug 24, 2016 here we are giving you electrochemical machining ecm seminar and ppt with pdf report. After passing through valve, the beam is then focused onto the surface of the workpiece. Find powerpoint presentations and slides using the power of, find free presentations research about electron beam machining ppt. Oct 31, 2017 this video gives the working principle of electron beam machining in two minute for best understand. Electron beam and laser beam machining powerpoint ppt presentation. On this channel you can get education and knowledge for general issues and topics. The main uses of these machines are in the electronic industry for contactor materials and resistors and in the sawblade industry where highspeed steel is welded to spring steel support strips, making a finished material for various saw bimetal blades. Electron beam machining ebm is a metal removal process by a high velocity focused stream of electrons. 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.
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. A focused ion beam system can be regarded as composed of three parts. View and download powerpoint presentations on plasma arc machining ppt. Electron beam machining can be used to accurately cut or bore a wide variety of metals. Notes on electron beam machining ebm me mechanical.
Electronbeam machining can be used to accurately cut or bore a wide variety of metals. 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 ebm, electrons are accelerated to high velocity as half of the light speed, then it is impinged to. 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 basic functions of any electron beam gun are to generate free electrons at the cathode, accelerate them to a sufficiently high velocity and to. 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 order to cut harder materials like metals or granite, an abrasive material is mixed in the water.
Electron beam machiningebm electron machining scribd. All aspects of mechanical, electrochemical and thermal processes are comprehensively covered. This tree lists various manufacturing processes arranged by similarity of function. Today we will learn about laser beam machining principle, working, equipments, application, advantages and disadvantages with its diagram. Generally electron beam machining is done in a high vacuum chamber to avoid the unnecessary scattering of the electrons. Water jet machining wjm also called water jet cutting, is a nontraditional machining process in which highvelocity jet of water is used to remove materials from the surface of the workpiece. It is similar to the electron beam welding machine. Electrochemical machining ecm pdf report free download. Ptr is an electron beam welding systems manufacturer and contract welding service provider on the leadingedge of electron beam and vacuum welding technology. All you need to do is just click on the download link and get it.
Electron beam machining ebm 35 ebm operation eb gun accelerates a continuous stream of electrons to about 75% of light speed beam is focused through electromagnetic lens, reducing diameter to as small as 0. 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. There are many specifications to this power, the current density must be high, the difference between the tool and the work piece must be low for higher accuracy, thus the voltage must be low to avoid a short circuit and the control system uses. 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.
Mar 17, 2016 electron beam machining ebm is a thermal process. Depending upon the intensity of heating the workpiece can melt and vaporize. This process is used in many applications, including drilling, cutting, annealing, and welding. The kinetic energy of the electrons, upon striking the workpiece, changes to heat, which vaporizes. Electron beam machining equipment the basic functions of any electron beam gun are to generate free electrons at the cathode. Ppt laser beam machining powerpoint presentation free to. Electric discharge wire cutting electron beam machining laser beam machining plasma arc machining conventional. Pdf on electron beam machining electron beam machining ebm and laser beam machining lbm are thermal processes considering the mechanisms of material removal. Displaying powerpoint presentation on electron beam machining available to view or download. 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 beam removes atoms from the workpiece by transferring energy and momentum to. Modern machining processes presents unconventional machining methods which are gradually commercial acceptance. 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 is thermal machining process in which use of a focused beam of high. Apr 21, 2016 mechanism of material removal in ebmm1 an electron beam gun generates a continuous stream of electrons. 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. Surface finish is better and kerf width is narrower than those for other thermal cutting processes. Scribd is the worlds largest social reading and publishing site. Find powerpoint presentations and slides using the power of, find free presentations research about plasma arc machining ppt. View electron beam machining process ppts online, safely and virus free. 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. A detailed notes on electron beam machining process, and surely helps you.
Ebd is a thermal drilling process by which small through holes in the range of 0. Electric discharge wire cutting electron beam machining. View electron beam machining ppts online, safely and virus free. Ebm is a highenergybeam machining process electrical energy is used to generate highenergy electrons the mechanism of material removal is primarily by melting and rapid vaporization due to intense heating by the electrons. Apr 21, 2017 electron beam machining ebm invented in germany in 1952 by dr. The ebm technique is used for cutting fine holes and slots in any material.
A thermal oxidizer blends several manufacturing processes such as molding, forming, machining, etc. The electron beam melting is a process applied in case of some electron beam machining methods. A point beam can be steered over the surface under computer control in an arbitrary dose profile. Ebm can be used for very precise cutting or boring of a wide variety of metals. Jul 17, 2018 electron beam machining construction and working of electron beam machining.
Electron beam machining is required to be carried out in vacuum. Ppt laser beam machining powerpoint presentation, free. Electron beam welding process, applications and equipment. Dec 07, 2016 electron beam machining is a kind of machining process by using highvelocity electron beam. Electrolysis is based on faraday laws of electrolysis which is stated as. To focus the electron beams electrostatic or electro magnetic lenses are 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. Ebm machines were first commercialized in approximately 1997 by the arcam ab corporation in sweden nakao et al. Ppt electron beam and laser beam machining powerpoint. This is similar to the way electron beam lithography is used.
Further, the beam needs to be manoeuvred if required by the gun. Electron beam machining free download as powerpoint presentation. Electron beam melting an overview sciencedirect topics. The s7 eb welder is used for high speed continuous electron beam welding of metal strips. With the demand for stringent technological and functional requirements of the parts from the micro to nanometre range, ultra.
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