Chak associate professor, manufacturing processes and automation engineering department netaji subhas institute of technology, new delhi email. Ultrasonic machining usm and waterjet machining wjm are typical examples of single action, mechanical non traditional machining processes. In this study, electric discharge machining edm process was used for machining commercially available inconel 718. Electro chemical spark deposition material deposition material removal. Electric discharge machining edm process video lecture by. These courses are based on the curriculum of iits and iisc provided under nptel. It is also known as spark machining or spark eroding process principle in this process, electrical energy is used to generate the spark between. Part 3 elaborates chemical and electrochemical machining processes. Compared with conventional machiningfrom basic cnc turning all the way up to 5axisedm has certain advantages and disadvantages. Ive gotten and read all of the edm books on amazon and this one has the best combination of theory and practice. Nptel, iit electrical engineering video lectures, courses, classes, tutorials, training iit video courses and video lectures.
Wire electric discharge machining wire edm youtube. Simplicity and small sized setup make ecdm a very attractive technology. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses, youtube iit videos nptel courses. Electrical discharge machining is a manufacturing process whereby a desired shape is obtained by using electrical discharges sparks. Mechanical engineering manufacturing processes ii nptel. Electro discharge ltd is part of the mj sections aerospace group offering an electro discharge machining, spark eroding and wire cutting service to a diverse group of industries including aerospace, motor sport, nuclear and oil. Electrochemical machining ecm is used to remove metal and alloys which are difficult or impossible to machine. If you are not able to download lectures due to bandwidth constraints, you can obtain the courses in dvds by. Autoplay when autoplay is enabled, a suggested video will automatically play next. Electro discharge machining technology suitable for both serial and small quantity production edm is basically a thermal process in which the material is removed by the action of electric sparks between two electrodes made of conductive materials. Nptel electrical engineering video lecture online study. In electric discharge machining process an arc is produced when two currentcarrying wires are shortcircuited. Advanced machining processes video course mechanical. On electro discharge machining of inconel 718 with hollow.
Edm involves the direction of highfrequency electrical spark discharges from a graphite or soft metal tool, which serves as an electrode, to disintegrate electrically conductive materials such as hardened steel or carbide. Electrode tool wear at electrical discharge machining conference paper pdf available in key engineering materials 504506 april 2012 with 1,698 reads how we measure reads. Introduction electrochemical machining ecm is one of the newest and most useful nontraditional machining ntm process belonging to electrochemical category. Manufacturing processes ii nptel online videos, courses iit. Developed in the mid 1970s in the mid 1980s, the edm techniques were transferred to a machine tool today,it is a viable technique that helped shape. In ecm, cathode parts must design specially to machining work piece. Debaprasad kastha, department of electrical engineering, iit kharagpur. Electrochemical discharge machining ecdm is a combination of two nonconventional machining processes, namely electrochemical machining ecm and electric discharge machining edm. Electrochemical machining ecm seminar with pdf report. Lecture 1 introduction to illumination engineering. Paul,department of mechanical engineering, iit kharagpur. Pdf electrode tool wear at electrical discharge machining. Oct 23, 2008 lecture series on manufacturing processes ii by prof.
The international academy for production engineering, laperriere l. Kishore, department of electrical engineering,iit kharagpur. Electrical pulse width modulation for power electronic converters playlist. Ultrasonic machining national institute of technology. Sharma, department of mechanical engineering, iit roorkee.
Electrical discharge machining edm and electrochemical machining ecm offer a better alternative or sometimes the only alternative in generating accurate 3d complex shaped macro, micro and nano features and components of difficulttomachine materials. Up next electric discharge machining edm process duration. On this channel you can get education and knowledge for general issues and topics. Microelectrodischarge machining technologies for mems.
Nptel video lectures, iit video lectures online, nptel youtube lectures. Tec h, mec anic al engineering cd m, bharati vidyapeeth deemed university college of engineering,pune. To learn about various unconventional machining processes, the various process parameters and their influence on performance and their applications. Other machining processes theres more than one way to skin a cat, as the old expression goes. Electrical engineering pulse width modulation for power electronic converters. Electric discharge machining edm process tutorial of advanced manufacturing processes course by prof a. These hydrocarbon oils, made of the highest purity, and are designed for use in electrodischarge machines edm of most power ratings. Up next diesinker edm and wire cut electric discharge machining. Advanced machining processes online course video lectures by. Electrical discharge machine the traditional machining processes rely on harder tool or abrasive material to remove the softer material whereas nontraditional machining processes such as edm uses electrical spark or thermal energy to erode unwanted material in order to create desired shape. Advanced machining processes online course video lectures. Since the acquisition of our first wickman, edm precispark has strived to stay at the forefront of the process technology through innovation and investment. Your browser does not currently recognize any of the video formats available. Bimbhra electrical machinery is a complete guide for engineering students that consists of revised and updated version of handling of transformers and other familiar types of rotating electrical.
This alloy has been widely used in jet engines and highspeed airframe parts in aeronautic application. Electrochemical and electrodischarge machining processes are the two major electromachining processes with unique capabilities. Figure 3 shows a sample structure fabricated by a prototype 5axis system with two rotational mechanisms takahata et al. Bp dialectric fluids are designed for use in electrodischarge machines edm of most power ratings. Modelling and control of dynamic electromechanical system. Nptel provides elearning through online web and video courses various streams. Electro discharge machining edm is an electrothermal nontraditional machining process, where electrical energy is used to generate electrical spark and. Instructional objectives i manufacturing process ii.
Electrical discharge machining is a machining method primarily used for hard metals or those that would be very difficult to machine with traditional techniques. Review of electrochemical and electrodischarge machining. Electrical engineering video lectures from nptel, iit, mit. Diesinker edm and wire cut electric discharge machining wedm 21. Nptel mechanical engineering manufacturing processes ii. Lecture 29 electrical discharge machining process cont. Electrical engineering video lectures tutorials lecture 16 power ports lecture.
Nov 09, 2015 why you should consider electro discharge machining advantages. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online. Electric discharge machining edm process video lecture. It is troublesome to machine three dimensional microshapes limitations of traditional machining most nontraditional micromachining processes are thermal oriented, e. Mar 11, 2016 in electric discharge machining process an arc is produced when two currentcarrying wires are shortcircuited. Lecture series on manufacturing processes ii by prof. Electric discharge machining edm working principleequipmentsprocess parameters. Electricaldischarge machining technology britannica. Anywhere from 1,000 to 100,000 sparks are generated on and off between the electrode and the metal per second.
Electrical discharge machining edm electrical discharge machining edm is ideal for intricate burrfree cutting of intricate contours or cavities in hard materials, eliminating the need to soften the material before machining, and then reharden it through heattreating. The machining of thin and fragile material is very difficult for manufacturing. Similarly, theres typically more than one way to cut parts. Electric discharge machining edm process video lecture by prof. Illlumination engineering nptel online videos, courses. Electric discharge machiningbasic terms and working. Welcome to this session on electro discharge machining under the. The process of metal removal by electro chemical dissolution was known as long back as 1780 ad but it is only over the last couple of decades that this. Thus electrochemical discharge machining ecdm was developed by kura fuji in 1968 s. Electrical machinesi nptel online videos, courses iit. Nptel electrical engineering electrical machines ii nptel provides elearning through online web and video.
Lecture electric discharge grinding, electric discharge diamond grinding and wire electric discharge machining. The book also describes the development of electrical discharge machining edm, the edm system and process, the edm sparking system, the power supply generator, spark voltage, electrode servo systems, dielectric systems, ionization and electrode wear, chips, the edm surface, dc arcing, different kinds of edm, automatic servo systems. Nptel transformers video lectures, electrical machines lectures, dc machines video, nptel video lectures, nptel online courses, youtube iit videos nptel courses. Lecture 19 electric discharge machining edm process. I wanted a way to make a steel instructables character, so i decided to make my own edm machine to help me. Tool of ecm system the power supply the electrolyte circulation system the control system the machine. Electrical discharge machining used on hard metals works with electrically conductive materials 3. Micro electro discharge machining technologies for mems 145 the process. A presentation about wire electrical discharge machining wedm slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Edm machining process is also known as spark erosion machining.
Usm is used for machining hard and brittle materials, which are poor conductors of electricity and thus cannot be processed by electrochemical machining ecm or electro discharge machining. Electric discharge machining spark machining or spark erosion machining erosion of craters left by electric discharge on cathode surface was first discovered by joseph priestley an english theologian. The electrical discharge machining edm process we know today started with the observations of joseph preistly in 1770. Working a principle of wire cut electric discharge machining is same as that of electric discharge machining. Electrical discharge machining wire edm edm machining. Understanding electrical discharge machining 29 automation and edm here is an example in which one may use their imagination to become more competitiveusing automatic production cells. May 17, 2011 inconel 718 is a nickelbased alloy designed for high yield, tensile, and creeprupture properties. Microelectro discharge machining of holes and grooves. Electrical discharge grinding edg is a hybrid process involving energy of sparking as well as mechanical grinding.
He noticed that electrical discharges had removed material from the electrodes in his experiments. White sands test facility can easily machine complex parts and precision components out of hard conductive metals for which traditional machining techniques are ineffective using our electrical discharge machining edm equipment. Electrical discharge machining, or edm, shapes metal by creating sparks that melt tiny portions of the workpiece, and is an exceptionally diverse process that generates no cutting forces. Another related technique is wire pedm, where brass wire is typically used as an electr ode. Developments in electrochemical discharge machining.
Material hardness does not effect process tungsten carbide stellite hastelloy nitralloy waspaloy nimonic inconel all can be successfully machined by edm. Mar 08, 2014 a presentation about wire electrical discharge machining wedm slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Today robots are available that can feed various machines, such as a milling machine, wire edm, and a ram edm. These sparks strike the surface of the metal, carving out the shape of the electrode. Diesinker edm and wire cut electric discharge machining. Lecture series on illumination engineering by prof. Learn for free, pay a small fee for exam and get a certificate. Chemical and electro chemical energy based processes 12 chemical machining and electro chemical machining. Edm typically works with materials that are electrically conductive, although methods have also been proposed for using edm to machine insulating ceramics. History of edm in1770s, discovered by joseph priestly. Machining ebm edit lesson lecture 18 laser beam machining lbm lecture 19 chemical machining chm.
If you continue browsing the site, you agree to the use of cookies on this website. Up next diesinker edm and wire cut electric discharge machining wedm duration. The electrolyte in ecm should have high electrical conductivity, low viscosity, high specific heat, chemical. During this machining process, a small portion of metals is also eroded away, leaving a small cater. Principles of electrical discharge machining and non. Nptel, online courses and certification, learn for free. In ultrasonic machining material removal is due to crack initiation, propagation and brittle fracture of material. In electro chemical machining an electrolyte acts as a current carrier.
Precisparks foundations were based on electrodischarge machining. Edm typically works with materials that are electrically conductive, although methods have also been proposed for using edm to machine. Nptel material is available for free on nptel website. The power needed to operate the ecm is obviously electrical. Today robots are available that can feed various machines, such as a milling machine. It is an electro thermal machining process where electrical energy is used to generate electrical spark and material removal mainly occurs due to thermal energy of the spark. Electrical discharge machining edm is one of the most extensively used nonconventional material removal processes. Electro discharge machining edm process is a nonconventional and noncontact machining operation which is used in industry for high precision products. Wire machining ram machining other edm processes electrical discharge milling electrical discharge grinding electrical discharge dressing ultrasonic aided edm abrasive electrical discharge grinding micro electrical discharge machining.
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