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. 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. 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. In electric discharge machining process an arc is produced when two currentcarrying wires are shortcircuited. There is no case of micromachining in conventional machining methods and that has been fed up with the unconventional machining methodsadvanced manufacturing methods because of the following reasons.
Exercises 6 summary summary the edition addresses issues essential to modern manufacturing, ranging from traditional topics such as casting, forming, machining, and joining, to advanced topics such as the fabrication of nanomaterials. The electrons strike the work piece and their kinetic energy converts into thermal energy heating the metal so that the edges of work piece are fused and joined together forming a weld after. The power needed to operate the ecm is obviously electrical. In this machining process metal is removed by melting and vaporization of metal particle from surface of work piece. 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. Electron beam machining is same as laser beam machining process in which except laser, high speed electron beam impinges on work piece. Electron beam machining free download as powerpoint presentation. It is thermal, noncontact process, which does not induce any mechanical stresses in the workpiece. Find powerpoint presentations and slides using the power of, find free presentations research about electron beam machining ppt. Advanced manufacturing processes amps electron beam. Electron beam welding process, applications and equipment. When this high velocity electron strikes the workpiece, it melts and vaporizes the material from the workpiece.
Singh, balbir singh modern machining processes presents unconventional machining methods which are gradually commercial acceptance. Electronbeam machining can be used to accurately cut or bore a wide variety of metals. Electron beam machining ebm is thermal machining process in which use of a focused beam of high. Ebm modules of electron beam gun cathode cartridgetungsten or tantalum. Electron beam and plasma welding processes duration. Electron beam machining ebm advantages and disadvantages. This report focuses on the top players in north america, europe, china, japan, southeast asia india and other regions middle east. Collection of continuous rotation microed data from ion.
The cathode is generally made of tungsten or tantalum. In an electron beam machining, the electrons strike the. The main reasons for choosing nontraditional machining processes are. Electron beam machining ebm kcg college of technology. Wjm can be used to cut softer materials like plastic, rubber or wood. View electron beam machining ppts online, safely and virusfree. The process of heating by electron beam is used for. The thermal effect is to cause the material to develop a heataffected zone, thus adversely affecting hardness and ductility see also heataffected zone, p. Electron beam welding electron beam welding ebw electron beam welding is a welding process utilizing a heat generated by a beam of high energy electrons. This will generate high heat energy and melts and vaporize metal from work piece. The highenergy focused electron beam is made to impinge on the. On this channel you can get education and knowledge for general issues and topics. 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.
Electronbeam machining is a process in which highvelocity electrons are concentrated into a narrow beam with a very high planar power density. Function is to generate, shape and deflect the electron beam to drill or machine the workpiece. The advanced machining processes which cause thermal damage are obviously those that involve high levels of heat, that is, edm, and laserbeam and electronbeam machining. Kinetic energy of electrons heat rapid melting and vaporizing drilling, cutting, slotting, welding, annealing, milling, and rapid electron. Whether you want to launch a new product with ebeam inside or simply upgrade your existing product line, we have the solution for you.
This page contains micromachining seminar and ppt with pdf report. Laser beam machining is a form of nontraditional machining that can machine almost any known materials. 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. View electron beam machining process ppts online, safely and virusfree. Like other techniques using am, this also creates objects layer by layer nasr et al. Otherwise the electrons would interact with the air molecules, thus they would lose their energy and cutting ability. All aspects of mechanical, electrochemical and thermal processes are comprehensively covered. Electron beam machining ebm advantages and disadvantages electron beam machining is a thermal process used for the metal removal during the machining process. Awjm abrasive water jet machining ebm electron beam machining lbm laser beam machining 6.
Ebm machines were first commercialized in approximately 1997 by the arcam ab corporation in sweden nakao et al. It is a nontraditional machining process in which no physical tool is used. Electron beam machining is process in which high velocity electrons are concentrated in a narrow beam and then directed towards the workpiece for machining. Electronbeam machining ebm is a process where highvelocity electrons concentrated into a narrow beam are directed toward the work piece, creating heat. 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.
Sunil pathak 2 process principle continued the process of heating by an electron beam can be used for annealing, welding, or machining electron beams are focused to a point within 10 200. Yunitha ratnadilla tri adhi kusuma 1560tk37951 electron beam machining a. During this machining process, a small portion of metals is also eroded away, leaving a small cater. Working principle of electron beam machining in the electron beam gun the electric beam is.
Electron beam and laser beam machining pptx powerpoint. Ebm can be used for very precise cutting or boring of a wide variety of metals. 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. The surrounding media and the excess crystalline area was initially grossmilled using a beam current of 300 pa to clear away the large, thick, unwanted volumes above or below the sample to a thickness of approximately. Electron beam machiningebm free download as powerpoint presentation. Electrochemical machining ecm seminar with pdf report. 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. Depending upon the intensity of heating the work piece can melt and vaporize.
Also explore the seminar topics paper on micromachining with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year mechanical engineering me or production automobile students for the year 2019 2020. Water jet machining working principle, advantages and. Micromachining seminar report, ppt, pdf for mechanical. Edm machining process is also known as spark erosion machining.
Electron beam machining ebm is a metal removal process by a high velocity focused stream of electrons. As the electrons strike the work piece with high velocity, their kinetic energy is transformed into thermal energy which melts and vaporizes the material. View and download powerpoint presentations on electron beam machining ppt. Explore micromachining with free download of seminar report and ppt in pdf and doc format. Electron beam laser beam arc cutting oxyfuel cutting chemical machining.
Hence the machining process which utilizes other machining methods are termed as unconventional machining or nontraditional machining or advanced machining processes or modern machining processes. Further, the beam needs to be manoeuvred if required by the gun. Electron beam melting an overview sciencedirect topics. A focused beam of gallium ions accelerated at 30 kv was used for milling. In order to cut harder materials like metals or granite, an abrasive material is mixed in the water. Seminar on non conventional machining report download. Surface finish is better and kerf width is narrower than those for other thermal cutting processes. Ebm thermal process, similar to lbm materialheating. Introduction electron beam machining is one of the examples.
Electron beam machining is required to be carried out in vacuum. The beam crosssection is then focused and directed toward the work piece, creating heat and vaporizing the material. Laser beam machining is a thermal machining process which uses laser beam to produce heat. Machining is the broad term used to describe removal of material from a workpiece includes cutting, abrasive processes grinding, advanced machining processes electrical, chemical, thermal, hydrodynamic, lasers automation began when lathes were introduced in 1700s now have computer numerical control cnc machines. Our electronpowered innovation helps create improved materials, cleaner processes and greater efficiency. In the electrical beam machining, electrical energy is used to generate the electrons with high energy. Electron beam machining has been used in industry since the 1960s, initially in nuclear and aerospace welding application. Electron beam machining ebm invented in germany in 1952 by dr.
1254 564 1273 1534 411 1222 1614 1286 943 602 1477 1463 1081 1363 1611 223 1329 1023 1045 155 1350 1375 560 113 728 489 1356 1401 1198 41