The power needed to operate the ecm is obviously electrical. 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 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. Joining of materials joining includes welding, brazing, soldering, adhesive bonding of materials. Some of the processes employed for hole making are electrodischarge machining, laser beam machining, electron beam machining, shaped tube electro. Electrochemical machining ppt free download as powerpoint presentation. Electronbeam machining is a process in which highvelocity electrons are concentrated into a narrow beam with a very high planar power density. Get the pdf seminar report paper explaining the principle of laser beam machining, experimental studies. Plasma arc machining process, diagram, advantages and. Nptel provides elearning through online web and video courses various streams. The electron beam as a tool is the business basis of all company units of global beam technologies ag. Notes on electron beam machining ebm me mechanical.
Electron beam machining is process in which high velocity electrons are concentrated in a narrow beam and then directed towards the workpiece for machining. 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. In a vacuum chamber, a beam of highvelocity electrons is focused. Laser beam machining lbm plasma arc machining pam electron beam machining ebm 7. Electron beam machining construction and working of electron beam machining. Today we will learn about laser beam machining principle, working, equipments, application, advantages and disadvantages with its diagram. Part 2 deals with thermal machining processes for example, electric discharge machining, laser beam machining, electron beam machining, etc. The laser beam machining is essentially based on the effects generated at the contact of the workpiece surface with a laser beam that has adequate energetically and. This will generate high heat energy and melts and vaporize metal from work piece. Otherwise the electrons would interact with the air molecules, thus they would lose their energy and cutting ability.
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. In electric discharge machining process an arc is produced when two currentcarrying wires are shortcircuited. 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. Electron beam welding electron beam engineering, inc. During this machining process, a small portion of metals is also eroded away, leaving a small cater. The electron beam polishing equipment technology is brought forward and its characteristic is explained because general processing method cant obtain preferable machining efficiency and. Electron beam machining is required to be carried out in vacuum. Advanced machining processes by hassan abdelgaward elhofy.
Here a steam of high speed electrons impinges on the work surface so that the kinetic energy of electrons is transferred to. Further, the beam needs to be manoeuvred if required by the gun. It also includes micronanofinishing processes viz, abrasive flow finishing, magnetic abrasive finishing, etc. Principle, applications, and process parameters and modelling 8. Singh, balbir singh modern machining processes presents unconventional machining methods which are gradually. 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. Diy brick rocket stove cooking without electrical power duration. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses, youtube iit videos nptel courses. Sundaravalli, suchitra publications the book welding technology for engineering and technology studies.
The cathode is generally made of tungsten or tantalum. Electron beam technology is used worldwide with an increasing tendency. 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. Electrochemical grinding ecg, electrostream drilling esd, shaped tube electrolytic machining stem chemical. Download seminar report on the topic laser beam machining 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. Electronbeam machining is a kind of machining process by using highvelocity electron beam. Thermal phenomena at the laser beam machining springerlink.
Laser beam can very easily be focused using optical lenses as their wavelength ranges from half micron to around 70 microns. Ppt laser beam machining lbm powerpoint presentation. Contact electron beam engineering, electron beam engineering provides services throughout the u. Laser beam machining an overview sciencedirect topics. Electronbeam machining ebm the ebm technique is used for cutting fine holes and slots in any material. Electron beam machining definition electron beam machining ebm is a process where high velocity electrons concentrated into a narrow beam are directed toward. 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. Electrochemical machining ecm seminar with pdf report. Electron beam machining ebm invented in germany in 1952 by dr. It is similar to the electron beam welding machine. The applications of the electron beam machining technology. Plasma arc machining process, diagram, application, advantages and disadvantages introduction. About 5% of these are metal coating machinery, 1% are spot welders, and 1% are laser welders.
It is a nontraditional machining process in which no physical tool is used. Plasmaarc machining pam employs a highvelocity jet of hightemperature gas. Electron beam machining is same as laser beam machining process in which except laser, high speed electron beam impinges on work piece. An ion beam is a type of charged particle beam consisting of ions. Electron beam machining is same as laser beam machining process in which except laser, high speed. Electron beam machining free download as powerpoint presentation. Machining is the broad term used to describe removal of material from a workpiece includes cutting, abrasive processes grinding, advanced machining processes electrical, chemical.
They produce permanent joint between the parts to be assembled. Ultrasonic machining, water jet machining, abrasive water jet machining. Ion beams have many uses in electronics manufacturing principally ion implantation and other industries. Electrochemical machining ppt machining electrochemistry. Laser jet machining ljm electron beam machining ebm 4. Nontraditional and hybrid machining processes by hassan abdelgaward elhofy book is a good reference for both nontraditional and hybrid machining. Laser beam machining lbm is an excellent material processing technique to machine a wide range of advanced materials, especially difficulttomachine advanced ceramics and. Live simple, live free tinyhouse prepper recommended for you. 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.
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