In this machining process metal is removed by melting and vaporization of metal particle from surface of work piece. 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. May 12, 2017 electrochemical machining ecm is a machining process in which electrochemical process is used to remove materials from the workpiece. Ptr is an electron beam welding systems manufacturer and contract welding service provider on the leadingedge of electron beam and vacuum welding technology. It is widely used in cutting sheet and drilling holes. 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. Continuing our series of short notes on unconventional machining for gate mechanical engineering, here is the second process electron beam machining ebm. All aspects of mechanical, electrochemical and thermal processes are comprehensively covered. The electron beam as a tool is the business basis of all company units of global beam technologies ag. Hello everyone welcome to engineers academy topics covered. Further, the beam needs to be manoeuvred if required by the gun. The cathode is generally made of tungsten or tantalum.
This is a different process from electric discharge, electron beam, laser beam and plasma arc machining. Electrochemical machining ecm is a machining process in which electrochemical process is used to remove materials from the workpiece. A wide variety of electron beam machine options are available to you, such as substrate, type. Nontraditional and hybrid machining processes by hassan abdelgaward elhofy book is a good reference for both nontraditional and hybrid machining processes. Even today, new applications are being developed and used industrially, especially where other beam processes reach their limits.
Advanced machining processes video course course outline there is a need for machine tools and processes which can accurately and easily machine the most difficulttomachine. Lecture 17 electron beam machining ebm edit lesson. 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. Electron beam machining is a process in which highvelocity electrons are concentrated into a narrow beam with a very high planar power density. In ebm, first the electron is generated by the cathode and an annular biased grid does not allows the electron to diverge.
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. Ebm can be used for very precise cutting or boring of a wide variety of metals. Mar 30, 2017 today we will learn about laser beam machining principle, working, equipments, application, advantages and disadvantages with its diagram. Define advantage and disadvantage of electron beam machining. Electro chemical machining consists of following basic elements. It also includes micronanofinishing processes viz, abrasive flow finishing, magnetic abrasive finishing, etc. Laser beam machining an overview sciencedirect topics. Mohit ostwal assistant professor department of mechanical engineering jodhpur institute of engineering and technology, jodhpur 3282016 er. Absence of mechanical contact between work piece and tool. In the process, workpiece is taken as anode and tool is taken as cathode. Laser beam can very easily be focused using optical lenses as their wavelength ranges from half micron to around 70 microns. This process uses thermal energy to remove material from metallic or nonmetallic surfaces.
Electron beam machining ebm and laser beam machining lbm are thermal processes considering the mechanisms of material removal. The electron beam can be controlled very accurately, and machining tolerances of 0. Electron beam gun provides high velocity electrons over a very small spot size. 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. Mechanical engineering assignment help, define advantage and disadvantage of electron beam machining, define advantage and disadvantage of electron beam machining advantage 1. The beam crosssection is then focused and directed toward the work piece, creating heat and vaporizing the material. This will generate high heat energy and melts and vaporize metal from work piece. Jun 10, 2017 electro chemical machining consists of following basic elements. Lecture series on manufacturing processes ii by prof. The two electrodes workpiece and tool is immersed in an electrolyte such as nacl. Electron beam machining ebm methods machining engineering. Notes on electron beam machining ebm me mechanical.
The highly focused, highdensity energy melts and evaporates portions of the workpiece in a controlled manner. Dec 07, 2016 electron beam machining is a kind of machining process by using highvelocity electron beam. Advanced casting processes metal mould casting continuous casting squeeze casting vacuum mould casting evaporative pattern casting ceramic shell casting 6 3. Advanced machining processes by hassan abdelgaward elhofy. The applications of the electron beam machining technology in. Lecture 29 electron beam, plasma beam and ion beam machining lecture 30 submerged arc welding saw lecture 31 resistance welding process lecture 32 solid state welding processes lecture 33 friction welding process lecture 34 electron beam and plasma welding processes lecture 35 laser beam welding and diffusion welding processes. Paul,department of mechanical engineering, iit kharagpur. Ebm is a process for machining materials with the use of high velocity beam of electrons. Module 3 selection of manufacturing processes nptel. Electrochemical machining ecm electro discharge machining edm electron beam machining ebm laser beam machining lbm processes 2. Advanced machining processes video course course outline there is a need for machine tools and processes which can accurately and easily machine the most difficultto. The construction and working principle of the electron beam gun would be discussed in the next section. Lbm, plasma arc machining pam and electron beam machining ebm. Live simple, live free tinyhouse prepper recommended for you.
The first accelerator was developed in 1932 for nuclear physics experiments. Part 2 deals with thermal machining processes for example, electric discharge machining, laser beam machining, electron beam machining, etc. 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. Electron beam machining is required to be carried out in vacuum. Abstract electron beam is generated in an electron beam gun. Electro discharge machining edm electron beam machining ebm laser beam machining lbm processes 2. Singh, balbir singh modern machining processes presents unconventional machining methods which are gradually commercial acceptance. Now electron beam machining is mostly done in the vacuum atmosphere for the very simple reason i will. In this video we have explained working of electron beam machining process, we have seen the working principle, equipments. An optical viewing system is required in order to allow the operator to see the work, in order to position the beam. It is similar to the electron beam welding machine. How electron beam machining works engineers academy.
Advanced welding processes details of electron beam welding ebw laser beam welding. In ebm, electrons are accelerated to high velocity as half of the light speed, then it is impinged to. 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. Laser beam is focussed for melting and vaporizing the unwanted material from the parent material.
Depending upon the intensity of heating the workpiece can melt and vaporize. A free powerpoint ppt presentation displayed as a flash slide show on id. Energy in its direct form is used for machining like laser, laser beam is used for. In electro chemical machining an electrolyte acts as a current carrier. This process is used in many applications, including drilling, cutting, annealing, and welding. Nov 26, 2012 diy brick rocket stove cooking without electrical power duration. Short notes for gate mechanical engineering electron beam. Electron beam and plasma welding processes youtube.
The introduction of abrasive to the fluid jet enhances the machining. Department of mechanical and industrial engineering. Electron beam welding process, applications and equipment. Some of the processes employed for hole making are electrodischarge machining, laser beam machining, electron beam machining, shaped tube electrochemical machining and electrochemical spark. The course covers the details of the advanced machining theory and practices, advanced machining processes, advanced metal forming processes. 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. It is a nontraditional machining process in which no physical tool is used. Ion beam machining is generally a surface finishing process in which the material removal takes place by sputtering of ions. Electron beam machining is same as laser beam machining process in which except laser, high speed electron beam impinges on work piece. About 5% of these are metal coating machinery, 1% are laser welders, and 1% are spot welders. And then you have laser beam machining where again the energy is much more. Mar 17, 2016 electron beam machining ebm is a thermal process. Sharma, department of mechanical engineering, iit roorkee.
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 technology is used worldwide with an increasing tendency. 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. Electron beam machining can be used to accurately cut or bore a wide variety of metals. Ultrasonic machining, water jet machining, abrasive water jet machining. On this channel you can get education and knowledge for general issues and topics. Nternational sciences and ngineering ol o eptember finite. The deflecting coils allow the beam to have a range of movement of 12 mm. Ppt laser beam machining lbm powerpoint presentation.
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