- In the electrical discharge machining process, controlled erosion is carried out between the tool and the workpiece. d) All of the mentioned This set of Advanced Machining Processes Multiple Choice Questions & Answers (MCQs) focuses on “EDM-Mechanism of Material Removal – 1”. The evolution of wire EDM took place in which part of history? “In EDM, negative ions (electrons) collide with positive ions to generate heat.” a) 2000 to 3000ᵒC After invention of EDM, surface finish have improved by how much factor? How is material removed in Electro discharge machining? Electro-Discharge Machining (EDM) is one thermal energy based process where material is removed by localized melting and vaporization. d) 220 to 320 V b) 40 % metal. This set of Advanced Machining Processes Multiple Choice Questions & Answers (MCQs) focuses on “EDM-Mechanism of Material Removal – 1”. The solved questions answers in this Unconventional Machining Process - 3 quiz give you a good mix of easy questions and tough questions. View Answer, 7. It usually invovles sophisticated tools and equipment, but not here! Electrical discharge machining 1. © 2011-2020 Sanfoundry. In electro discharge machining (EDM), if the thermal conductivity of tool is high and the specific heat of work piece is low, then the tool wear rate and material removal rate are expected to be respectively (a) high and high (b) low and low (c) high and low (d) low and high Electrical Discharge Machining is a vital manufacturing process in tool manufacturing. b) Twenty b) False d) 1027 W/m2 - In Electrical Discharge Machining (EDM) process, the metal removal is carried out by melting and vaporization as there is a controlled erosion between two electrically conducting materials, the tool and the workpiece. View Answer, 4. c) 5 kHz Material is removed from the work piece by a series of rapidly recurring current discharges between two electrodes, separated by a dielectric liquid and subject to an electric voltage. a) True c) 30 % iii. 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 the metal working industry. 1. State whether the following statement is true or false about material removal in EDM. View Answer, 12. Which of the following geometries can be machined using EDM? Generally the workpiece is made positive and the tool negative. Only i b. i &ii c. i,ii & iii d. ii & iii (Ans:c) 2. The high frequency discharges cause melting and vaporization of material on the surface of both electrodes. EDM is a non-mechanical thermal shaping process with which material is removed by spatially and temporally separated electrical discharges between a workpiece electrode and a tool electrode. b) 20 to 120 V View Answer, 3. d) 1970s Wire electrical discharge machining (WEDM) technology has been widely used in production, aerospace/aircraft, medical and virtually all areas of conductive material machining. a) 1 to 20 V The solved questions answers in this Unconventional Machining Process - 1 quiz give you a good mix of easy questions and tough questions. Machining speeds have gone up to how many times after the invention of EDM? In this work, it was found that the stress waves released from the material during micro-electrical discharge-machining process indicate material removal by mechanical deformation and fracture mechanism. here is complete set of 1000+ Multiple Choice Questions and Answers, Prev - Advanced Machining Questions and Answers – Electro Discharge Machining-Introduction, Next - Advanced Machining Questions and Answers – EDM-Mechanism of Material Removal – 2, Machine Design Questions and Answers – Chain Drives, Advanced Machining Questions and Answers – EDM-Mechanism of Material Removal – 2, Manufacturing Engineering / Processes I Questions and Answers, Manufacturing Engineering / Processes II Questions and Answers, Machine Tools & Machining Questions and Answers, Advanced Machining Processes Questions and Answers, Advanced Machining Questions and Answers – ECG-Accuracy, Applications, Advantages and disadvantages, Advanced Machining Questions and Answers – EDM-Applications – 1, Advanced Machining Questions and Answers – Electro Discharge Machining-Introduction, Advanced Machining Questions and Answers – EDM-Applications – 2, Advanced Machining Questions and Answers – EDM-Surface Integrity, Advanced Machining Questions and Answers – EDM-Machining System – 1, Advanced Machining Questions and Answers – EDM-Heat Affected Zone (HAZ), Advanced Machining Questions and Answers – EDM-Applications – 3, Advanced Machining Questions and Answers – USM – Material Removal, Advanced Machining Questions and Answers – AJM – Material Removal Rate and Process parameters, Advanced Machining Questions and Answers – WJM – Process Parameters and Material removal, Advanced Machining Questions and Answers – LBM-Material Removal, Advanced Machining Questions and Answers – CHM – Process Parameters and Material removal, Advanced Machining Questions and Answers – Ion Beam Machining-Introduction, Material Removal Rate, Advanced Machining Questions and Answers – Electrochemical Buffing-Introduction, Material Removal, Advanced Machining Questions and Answers – Electrochemical Superfinishing-Introduction, Material Removal, Process accuracy. ... How is material removed in Electro discharge machining? here is complete set of 1000+ Multiple Choice Questions and Answers, Prev - Advanced Machining Questions and Answers – Electrochemical Deburring – 2, Next - Advanced Machining Questions and Answers – EDM-Mechanism of Material Removal – 1, Machine Design Questions and Answers – Belt Tensioning Methods, Machine Design Questions and Answers – Chain Drives, Online Training – SAN, C, Linux Kernel & Device Drivers Training, Chemical Process Calculation Questions and Answers, Aircraft Maintenance Questions and Answers, Manufacturing Engineering / Processes I Questions and Answers, Manufacturing Engineering / Processes II Questions and Answers, Machine Tools & Machining Questions and Answers, Advanced Machining Processes Questions and Answers, Advanced Machining Questions and Answers – Ion Beam Machining-Introduction, Material Removal Rate, Advanced Machining Questions and Answers – Magnetic Abrasive Finishing – Introduction, Advanced Machining Questions and Answers – Electrochemical Buffing-Introduction, Material Removal, Manufacturing Engineering Questions & Answers – Electric Discharge Machining, Advanced Machining Questions and Answers – Non Traditional Machining, Advanced Machining Questions and Answers – Plasma Beam Machining-Introduction And Machining system, Advanced Machining Questions and Answers – Water Jet Machining – Introduction and Machining system, Advanced Machining Questions and Answers – Electrochemical Grinding-Introduction, Advanced Machining Questions and Answers – Electrochemical Honning-Introduction, Advanced Machining Questions and Answers – Electronbeam Machining-Introduction, Equipment and Material removal, Advanced Machining Questions and Answers – Abrasive Jet Machining – Introduction and Machining system, Advanced Machining Questions and Answers – Photo Chemical Millling-Introduction, Advanced Machining Questions and Answers – EDM-Applications – 3. Some light oil like transformer oil or kerosene oil is used as dielectric. - In Electro-Chemical Machining (ECM) process, the metal removal is carried out by electrosysis Similarly, there’s typically more than one way to cut parts. b) Corrode and break One of the electrodes is called the tool-electrode, or simply the tool or electrode, while the other is … View Answer. View Answer, 10. How is material removed in Electro discharge machining? Partial removal of the tool material form the tool surface while machining the workpiece due to the discharge spark produced between the tool and the workpiece. ABSTRACT Metal removal mechanism in electrical discharge machine is mainly a thermal phenomenon in which thermal energy is produced with the help of electrical pulses and is dissipated through workpiece, tool and dielectric fluid. Electrochemical machining (ECM) is a method of removing metal by an electrochemical process. c) 20 - These two electrodes (the tool as cathode and the workpiece as anode) are separated by dielectric medium. Thus to summarise, the material removal in EDM mainly occurs due to formation of shock waves as the plasma channel collapse owing to discontinuation of applied potential difference. View Answer, 9. b) 3 kHz All Rights Reserved. To practice all areas of Advanced Machining, here is complete set of 1000+ Multiple Choice Questions and Answers. d) Electrode dimensions Manufacturing c) Thin walls & Fine features Intense heat is generated by means of electric sparks. What does an EDM machine do? Electrical discharge machining (EDM) is one of the most extensively used non-conventional material removal processes. c) 120 to 220 V View Answer, 5. b) Normally View Answer, 9. c) 8 µm Electrical Discharge machining is the process of metal removal from the work surface due to an erosion of metal caused by electric spark discharge between the two electrodes tool (cathode) and the work (Anode). View Answer, 3. Occasionally View Answer, 6 of machining costs can be reduced machined using EDM surface! Evolution of wire EDM took place in which we used to remove metal by electrochemical. Tough Questions ) 40 % c ) 8 µm d ) all of the mentioned View,. The machinability of some Advanced materials by a non-conventional material-removal process, electro-discharge machining method ( EDM process. 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