In ebm, electrons are accelerated to high velocity as half of the light speed, then it is impinged to. Module 3 selection of manufacturing processes nptel. The cathode is generally made of tungsten or tantalum. 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. This process is used in many applications, including drilling, cutting, annealing, and welding. Mar 30, 2017 today we will learn about laser beam machining principle, working, equipments, application, advantages and disadvantages with its diagram. The values of surface roughness for mild steel were calculated using model equations and boxbehnken design of response surface methodology rsm is used to parametric analysis.
In a vacuum chamber, a beam of highvelocity electrons is focused on a workpiece. Electron beam machining is required to be carried out in vacuum. 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. 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. The electron beam melting is a process applied in case of some electron beam machining methods. 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. Nternational sciences and ngineering ol o eptember finite. This will generate high heat energy and melts and vaporize metal from work piece. Use of mathematical modelling in electron beam processing. Pdf me6004 unconventional machining processes ump books. Notes on electron beam machining ebm me mechanical.
Mar 11, 2016 in electric discharge machining process an arc is produced when two currentcarrying wires are shortcircuited. Even today, new applications are being developed and used industrially, especially where other beam processes reach their limits. 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. 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. It uses a highvelocity stream of electrons focused on the workpiece surface to. In this machining process metal is removed by melting and vaporization of metal particle from surface of work piece. Mar 31, 2017 it is a nontraditional machining process in which no physical tool is used.
It also includes micronanofinishing processes viz, abrasive flow finishing, magnetic abrasive finishing, etc. The workpiece in electron beam machining is held in a. We aimed to control the microstructure of ebmbuilt ti48al2cr2nb using twostep heat treatment to improve the hightemperature 750 c creep resistance while also maintaining roomtemperature ductility. Some of the processes employed for hole making are electrodischarge machining, laser beam machining, electron beam machining. Absence of mechanical contact between work piece and tool. Sharma, department of mechanical engineering, iit roorkee. The modular architecture of ebess beamer series addresses various customer requirements. Atomic hydrogen welding the atomic hydrogen welding is an inert gas welding arc welding process done with nonconsumable electrodes. Nptel provides elearning through online web and video courses various streams.
This is a different process from electric discharge, electron beam, laser beam and plasma arc machining. Dec 07, 2016 electron beam machining is a kind of machining process by using highvelocity electron beam. 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 answers part b 16 marks question bank with answer, all the materials are listed below for the students to make use of it and score good maximum marks with our study materials. Ion beam machining machine tool technology britannica. Now electron beam machining is mostly done in the vacuum atmosphere for the very. A detailed notes on electron beam machining process, and surely helps you. Nptel syllabus advanced manufacturing processes web course course outline the course covers the details of the advanced machining. Nov 26, 2012 diy brick rocket stove cooking without electrical power duration.
Abstract electron beam is generated in an electron beam gun. Ion beam machining is generally a surface finishing process in which the material removal takes place by sputtering of ions. The construction and working principle of the electron beam gun would be discussed in the next section. In the process, workpiece is taken as anode and tool is taken as cathode. The electron beam as a tool is the business basis of all company units of global beam technologies ag. 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 lecture 37 introduction of laser beam machining process lecture 38 material removal rate of lbm. Electron beam micromachining it is a type of thermal micromachining processes. Electron beam technology is used worldwide with an increasing tendency. Jain, department of mechanical engineering, iit kanpur. Laser beam machining is a thermal machining process which uses laser beam to produce heat. The influence of the input parameter in case of electron beam welding munteanu adriana, nagit gheorghe department of machine tools, department of machine manufacturing technology technical university gh asachi iasi bdul d. Function is to generate, shape and deflect the electron beam to drill or machine the workpiece. Electron beam machining ebm and laser beam machining lbm are thermal processes considering the mechanisms of material removal. It is similar to the electron beam welding machine.
Enhancing the creep resistance of electron beam melted. 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. Further, the beam needs to be manoeuvred if required by the gun. Electron beam machining ebm kcg college of technology. And then you have laser beam machining where again the energy is much more.
Other articles where ion beam machining is discussed. The beam removes atoms from the workpiece by transferring energy and momentum to. The highly focused, highdensity energy melts and evaporates portions of the workpiece in a controlled manner. Diy brick rocket stove cooking without electrical power duration. Some of the processes employed for hole making are electrodischarge machining, laser beam machining, electron beam machining, shaped tube. About 5% of these are metal coating machinery, 1% are laser welders, and 1% are spot welders. 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. Each machine can be configured with a wide range of standard and customized chamber sizes, power requirements, energy saving features, rapid cycling, and more. Ultrasonic machining, water jet machining, abrasive water jet machining. Advanced machining processes online course video lectures by. Define advantage and disadvantage of electron beam machining. During this machining process, a small portion of metals is also eroded away, leaving a small cater. Electron beam equipment eb welding machines electron beam.
The influence of the input parameter in case of electron beam. Laser beam machining an overview sciencedirect topics. On this channel you can get education and knowledge for general issues and topics. Ebm can be used for very precise cutting or boring of a wide variety of metals. Electrochemical machining ecm is a machining process in which electrochemical process is used to remove materials from the workpiece. Depending upon the intensity of heating the workpiece can melt and vaporize. Advanced machining processes dvd media storage type. It is widely used in cutting sheet and drilling holes. Electro discharge machining edm electron beam machining ebm laser beam machining lbm processes 2. View electron beam machining process ppts online, safely and virusfree. Electron beam welding electron beam engineering, inc. 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. Capability of making very small holes and slots with high precision, in a short time in any material.
Electron beam machining is same as laser beam machining process in which except laser, high speed electron beam impinges on work piece. Advanced casting processes metal mould casting continuous casting. Parametric analysis of cutting parameters for laser beam. Electronbeam machining ebm the ebm technique is used for cutting fine holes and slots in any material. Electron beam melted ti48al2cr2nb alloy has undesirable creep resistance due to a neargamma structure that is not proper for creep. Welcome to the course on electron beam machining process. The introduction of abrasive to the fluid jet enhances the machining. 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. Live simple, live free tinyhouse prepper recommended for you. The two electrodes workpiece and tool is immersed in an electrolyte such as nacl.
Electron beam machining ebm electron beam machining is a thermal nontraditional process, uses electrical energy to generate thermal energy for removing material. Electron beam gun provides high velocity electrons over a very small spot size. Electron beam machining free download as powerpoint presentation. It is a nontraditional machining process in which no physical tool is used. In electron beam machining, as the electrons strikes the work piece. 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.
Principle, applications, and process parameters and modelling 8. The kinetic energy of the electrons, upon striking the workpiece, changes to heat, which vaporizes read more. Laser beam is focussed for melting and vaporizing the unwanted material from the parent material. The main difference between tungsten inert gas welding and this process is that in atomic hydrogen welding, the arc is obtained between the two tungsten electrodes rather than between the tungsten electrode and the workpiece. 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.
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