which of the following material can be machined using ecm?

For maximum power delivery using resistance capacitance relaxation circuit in EDM, discharge voltage should ___ % of the supply voltage? They may melt, chip, or go out of tolerance as you remove material. 1. *Any conductive metal can be machined. Both tool and workpiece must be electrically conductive. c) Decrease in melting point of work piece b) To make the medium conducting Instead of cutting metal using hardened tooling, material is removed more efficiently by an electrochemical process. Do you have questions or need more detailed information regarding this machine? A specially designed and shaped tool is used. View Answer. Among its wide material application capabilities are even improved and tough to machine metal alloys irrespective of their hardness, strength or thermal properties. In an EDM machine, metal removal rate is 1.937 cubic mm / min. Similar to hole drilling and 2D structuring, several materials can be machined using TW-ECDM: glass, quartz, alumina [ 91,92,105 ], piezoelectric (PZT) ceramics [ 100,106 ], and various composites (glass- and Kevlar-epoxy) [ 58 ]. c) Plastic If total amount of material to removed is 600 cubic mm. Complex and concave curvature parts can be produced easily by the use of convex and concave tools. d) Wood *Any groove geometry. Time required in min will be Tool Feed Rate: In ECM process, a gap of about 0.01 mm to 0.7 mm is maintained between the tool face and the work. è An unwanted change in UOM can cause an issue everywhere of the all the applications. Machining stainless steels dry is a little more difficult. Electrochemical machining (ECM) is a method of removing metal by an electrochemical process. (c) There is almost negligible tool wear so cost of tool making is only one time investment for mass production. Conclusion d) None of the mentioned As it is a contactless procedure with no heat input, the process is not subject to any of the disadvantages experienced with traditional machining methods, e.g. the cathode, is connected to a direct voltage source with the workpiece acting as the anode. Which of the following material cannot be machined using electronic discharge machine? Which of the following material can be machined using electronic discharge machine? Electrochemical Machining (ECM) material removal by anodic dissolution, using electrode in close proximity to work but separated by a rapidly flowing electrolyte. View Answer, 9. b) 23 c) Copper Traffic tools, such as cars, trains, planes, etc 3. Advantages ECM offers impressive and long lasting advantages. Electrochemical machining (ECM) is a metal -removal process base d on the principle of reverse electroplating. d) Wood Material removal rate in EDM increases with Theoretically tool life is high 3. Independent of workpiece hardness. Answer: a Explanation: Iron is a good conductor of electricity and hence can be machined using electronic discharge machine. - The shapes and cavities, which are extremely difficult and costly to machine with conventional machining processes, can be produced by Electro-Chemical Machining (ECM) - The advantages of ECM process are as follows: 1. Complex shapes can be machined. ECM is used to machining disk or turbine rotor blade. a) Increase in melting point of work piece 2. Electrochemical Machining Processes (ECM) Download: 17: Material Removal Rate of ECM: Download: 18: Electrode Double Layer: Download: 19: Material removal rate of an alloy in ECM: Download: 20: Kinematics and Dynamics of ECM: Download: 21: Temperature and Pressure rise during ECM… d) None of the mentioned Which of the following materials can be machined using Electro discharge machining? Heat can cause problems in these materials. b) Increase in Current Material of workpiece is removed by anodic dissolution. 2. The removed material is precipitated from the electrolyte solution in the form of metal hydroxide. Production of satellite rings and connecting rod, machining of gears and long profile etc. 5. You benefit from our speed and global networking. This method is sometimes called "spark machining" because it removes metal by producing a rapid series of repetitive electrical discharges. : The three layers are the following: (1) Spheres attached to the surface made of part material and electrode material that have spattered the surface. ensure good dissolution of the work-piece material during the ECM process without the tool being attacked. Electrochemical Machining Processes (ECM) Download: 17: Material Removal Rate of ECM: Download: 18: Electrode Double Layer: Download: 19: Material removal rate of an alloy in ECM: Download: 20: Kinematics and Dynamics of ECM: Download: 21: Temperature and Pressure rise during ECM… Workpiece material is removed only at precisely defined locations. Vertical Turning and Grinding Centers, Chucked Components, Vertical Turning and Grinding Centers, Shafts, Low-level tool wear (cathode), an ideal precondition for batch production, No thermal and mechanical effects, therefore, no changes in the material properties, Hardness, toughness and magnetic qualities of the material remain unchanged, Possibility to machine diminutive and thin-walled contours, A high degree of repeat accuracy in the machining of the surface structure, Simple but highly efficient production process; no need for subsequent deburring or polishing, Rough-machining, finish-machining and polishing in a single operation, Possibility to simultaneously machine macro and micro structures. Electrical discharge machining (EDM), also known as spark machining, spark eroding, die sinking, wire burning or wire erosion, is a metal fabrication process whereby a desired shape is obtained by using electrical discharges (sparks). ECM can also be used to generate internal profile of internal cams. FHD (Fast Hole Drilling) EDM 1.4. 3. d) 402 ECM can be used to generate internal profile of internal cam. The machining can be carried out regardless of the structural condition of the metal and both soft and hard materials, including exotic metals, can be machined. C. The harder the workpiece material, the slower the metal removal rate. Tool materials used in Electrochemical Machining (ECM) Introduction . (b) Complex shapes can be easily machined. 2. Drilling holes with high depth/diameter ratios, greater than 100:1 4. Advantages. This set of Manufacturing Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Electric Discharge Machining”. Instead of cutting metal using hardened tooling, material is removed more efficiently by an electrochemical process. Yet, certain plastics remain tricky to machine. Enhanced component longevity. The ECM process is a revolutionary way to manufacture high precision components. View Answer, 5. ECM is used to machine workpieces through the anodic dissoultion of metal. The process is used in aerospace engineering and the automotive, construction, medical equipment, microsystem and power supply industries. The tool is usually made of copper, brass, stainless steel, and it is a mirror image of the desired machined cavity. Dielectric medium in EDM is used for c) Electric discharge machine a) 80 It can be reduced by specifying the proper settings and removed by polishing. c) 65 a) Iron Both external and internal geometries can be machined. Answer: d ... Advanced Machining Questions and Answers – ECM-Applications and Micro-ECM ; a) Iron b) Rubber c) Plastic d) Wood View Answer. The ECM process is capable of machining metals and alloys irrespective of their strength and hardness. Tool:-A specially designed and shaped tool is used for ECM, which forms cathode in the ECM setup. (a) Copper and brass (b) Aluminium and graphite (c) Silver tungsten and copper tungsten (d) Cast iron 2. The Dynamic ECM process is a revolutionary way to manufacture high precision components. b) Rubber Which of the following machine uses non conventional machining technique for metal removal? Very small holes can be machined in every type of material with high accuracy 3. The ECM process is a revolutionary way to manufacture high precision components. The tool, i.e. Which of the following EDM machine is used for die cast tooling? What are the various tool materials that can be used effectively with ECM? c) Wire and Sinker EDM both a) Wire EDM The workpiece is typically cut from a larger piece of stock, which is available in a variety of standard shapes, such as flat sheets, solid bars, hollow tubes, and shaped beams. A charge exchange takes place between the cathode and the anode in an aqueous electrolyte solution which targets specific areas of the workpiece. Significant productivity gains can be achieved with machines for the production of engine parts, such as blisks. The two most common products of ECM are turbine/compressor blades and rifle barrels. The ECM process is used for die sinking operation, profiling and contouring, drilling, grinding, trepanning and micro machining. Household appliances: refrigerators, washing machines, air conditioners, etc. b) Sinker EDM Sanfoundry Global Education & Learning Series – Manufacturing Engineering. Electrical discharge machining will only work if the material is electrically conductive. Relative material removal rates (frequency = 16.3 kHz, amplitude = 12.5 um, grain size = 100 mesh) Work material Relative MRR Glass 100.0 Brass 6.6 Tungsten 4.8 Titanium 4.0 Steel 3.9 Chrome steel 1.4 Advantages of ECM Process: (а) Machining of hard and brittle material is possible with good quality of surface finish and dimensional accuracy. Join our social networks below and stay updated with latest contests, videos, internships and jobs! a) Grinding machine The machine base, worktable and all other parts are constructed of corrosion-resistant, materials to avoid corrosion. Negligible tool wear. Emag ECM and PECM technologies for the end user are engineered for low tool wear on the cathode, which is ideal for batch production. tool wear, mechanical stresses, micro-fissures caused by heat transfer or the need for subsequent deburring operations. Material removal rate in EDM increases with View Answer, 10. The mechanism of material removal in EDM process is (a) Melting and Evaporation (b) Melting and … Workpiece material is removed only at precisely defined locations. The removed material is precipitated from the electrolyte solution in the form of metal hydroxide. Please contact us! Aluminum, Brass, Bronze, copper, carbon, stainless steel and monel are a few of the material used for this purpose. 1. 2. d) None of the mentioned 5. b) Decrease in Current 5. ECM can machine highly complicated and curved surfaces in a single pass. It is normally used for mass production and is used for working extremely hard materials or materials that are difficult to machine using conventional methods. Wire EDM 1.3. They can provide surface finishes to Ra 0.05, depending on the material and are suitable for high precision production in almost all machining areas. Participate in the Sanfoundry Certification contest to get free Certificate of Merit. View Answer, 2. At present, most of our products are manufactured and assembled by traditional methods, such as: 1. View Answer, 8. View Answer, 6. a) Wire EDM ECM is often characterized as “reverse electroplating.” Instead of adding a layer of metal plating to an object, ECM removes a layer of material. Further, those areas on the tool where ECM action is not required, should be insulated. In many austentic alloys, heat also does not flow well from the cutting zone into the chips because thermal conductivity tends to be low. 5. In this p rocess, particles travel from the anodic material (workpiece) toward the cathodic material (machining tool). The wire may be guided horizontally or vertically. Electro-chemical Machining Presented by: Keisham Sushima Devi DIP/14/ME/12 2. A. ECM is basically the reverse of electroplating. EMAG provides a worldwide service network. Electrochemical machining works on the Faraday law of electrolysis which state that if two electrode are placed in a container which is filled with a conductive liquid or electrolyte and high ampere DC voltage applied across them, metal can be depleted form the anode (Positive terminal) and plated on the cathode (Negative terminal). ECM has no tool wear and high surface finish as dissolution occurs at atomic level. 2. a) 100 20. a) Iron 3. The components are subjected to neither thermal nor mechanical stresses. 4. Several hybrid machining processes are resorting to ECM as one of the candidate process because of the following advantages of ECM: 1. Processes to be considered on difficult to machine materials 1.0. Match List I (Machining processes) with List II (Operating media) and select the correct answer using the codes given below the Lists: ... By which one of the following processes the metering holes in injector nozzles of diesel engines can be suitably made? Its use is limited to electrically conductive materials. Workpiece material is removed only at precisely defined locations. EDM – Electro Discharge Machining 1.1. Advantages of this process include: Design accuracy. c) 309 Unlike other machining methods that place a cutting tool edge against raw metal, ECM uses chemicals and electricity to form the surface of the material to the desired configuration. The components are subjected to neither thermal nor mechanical stresses. Which of the following EDM machine is used for cutting shapes cut out of a flat sheet or plate of metal? ECM has no tool wear and high surface finish as dissolution occurs at atomic level. It is used for machining steam turbine blades within closed limits. Proper allowances are given in tool size to get the dimensional accuracy of the machined surface. Only electrically conducting materials can be processed by ECM. ECM is capable of machining metals and alloys irrespective of their strength and hardness 2. What factors should be considered in selecting the tool materials in ECM? b) 200 c) Decrease in current B. Machining is a term used to describe a variety of material removal processes in which a cutting tool removes unwanted material from a workpiece to produce the desired shape. Our technical hotline records all inquiries and gives you technical assistance in problem solving. Cutting depth is reproducible to <20 microns. View Answer, 4. View Answer, 3. Generally aluminium, copper, brass, titanium, cupro-nickel and stainless steel are used as tool materials. d) None of the mentioned © 2011-2020 Sanfoundry. a) Flushing away the debris All electro-chemical machining processes are characterized by stress-free stock removal, gentle transitions and top-quality surfaces without burr formation. As can be seen the more brittle material is machined more rapidly. Instead of cutting metal using hardened tooling, material is removed more efficiently by an electrochemical process. The traditional mechanical machining has a long history, it has played a great role in human production and material civilization. You benefit from our speed and global branch offices. Complex shapes can be machined. 4.During the electrochemical machining of Iron (ECM) of iron (atomic weight= 56, valency=2) at current of 1000A with 90% current efficiency, the MRR was 0.26gm/s.If titanium (atomic weight= 48, valency=3) is machined by the ECM process at the current of 2000A with 90% current efficiency find the expected MRR in gm/s Solution  Use MRR= AI/ZF 0.26= 56*900/F*2 F= 96923 … Also, while machined parts are typically metal, almost all materials can be machined, including metals, plastics, composites, and wood. Through controlled changes of the master using the ECM can improve the margins in a phased manner. Electrochemical machining (ECM) is used to remove metal and alloys which are difficult or impossible to machine … d) None of the mentioned b) Sinker EDM Acetal, PEEK and PVC plastic materials have superior machining characteristics, plus they resist melting and chipping while offering good dimensional stability. It can over-temper martensitic alloys, for example. different work materials. Sinking EDM 1.2. b) Milling machine ECM operation. c) Wire and Sinker EDM both Advantages of this process include: Design accuracy. Independent of workpiece hardness. d) 72 It can be used for slotting very thin walled collets. v. Size, shape and material of the tool: The tool must match the required shape of the work-piece depending on the material and the profile to be produced. Metals that can be machined with EDM include hastalloy, hardened tool-steel, titanium, carbide, inconel and kovar. You have questions or need detailed information? A single tool can be used to machine a large number of pieces without any loss in its shape and size. To name these are few are the losses created by an unwanted change for the master data like material master. Advantages of this process include: Design accuracy. During the process the metal work piece is dissolved (Machining) locally through electricity (Electro) and chemistry (Chemical) until it reaches the required complex 3D end shape. Electro-chemical machining is based on the principle of electrolysis. EMAG ECM provides electrochemical machining (ECM) technology and systems for the production of extremely hard materials and residue-free production of strategic workpieces. All kinds of weapons and equipment: guns, canon, tanks, rockets, … c) To decrease the material removal rate a) Heat resistant alloys b) Super alloys c) Carbides d) All of the mentioned View Answer. d) None of the mentioned In regard to ECM (electrochemical machining), which one of the following is NOT true? Only electrically conducting materials can be processed by ECM. Electro-Chemical Machining (ECM) is the generic term for a variety of electro-chemical processes. D. Machining can be used to create a variety of features including holes, slots, pockets, flat surfaces, and even complex surface contours. No cutting forces are involved in ECM process 3. The tool is usually made of copper, brass, stainless steel, and it is a mirror image of the desired machined cavity. Several hybrid machining processes are resorting to ECM as one of the candidate process because of the following advantages of ECM: 1. Introduction Electrochemical Machining (ECM) is one of the newest and most useful non-traditional machining (NTM) process belonging to Electrochemical category. NaOH is generally the preferred electrolyte. ECM can cut small or odd-shaped angles, intricate contours or cavities in hard and exotic metals, such as titanium aluminides, Inconel, Waspaloy, and high nickel, cobalt, and rhenium alloys. Machine tool - Machine tool - Electrical-discharge machining (EDM): EDM involves the direction of high-frequency 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. Which of the following is/are used as low wearing tool material(s) in electric discharge machining? (2) Recast or white layer where EDM has altered the workpiece metallurgical structure. , trepanning and micro machining ) Super alloys c ) Carbides d ) View... It is used for ECM, which one of the following is not true wear and high finish! Required in min will be a ) Iron b ) Rubber c ) There is almost negligible tool wear mechanical. By an electrochemical process the proper settings and removed by polishing the Dynamic ECM process is a metal -removal base! “ Electric discharge machining as low wearing tool material ( s ) in Electric discharge?... Rod, machining of gears and long profile etc assistance in problem solving titanium cupro-nickel. An aqueous electrolyte solution in the form of metal hydroxide cubic mm / min relaxation in... Presented by: Keisham Sushima Devi DIP/14/ME/12 2 80 b ) Aluminum c ) Plastic d ) View... And removed by polishing extremely hard materials and residue-free production of extremely materials! Introduction electrochemical machining ( NTM ) process belonging to electrochemical category updated with contests! Especially high-alloyed nickel- or titanium-based ones, as well as hardened materials in min be! The more brittle material is electrically conductive conducting materials can be easily machined curved..., plus they resist melting and chipping while offering good dimensional stability greater accessibility the. But offers greater accessibility to the workpiece and tooling ) Iron b ) Rubber c Plastic... Which forms cathode in the sanfoundry Certification contest to get free Certificate of Merit wear mechanical! And top-quality surfaces without burr formation removed more efficiently by an electrochemical process its shape which of the following material can be machined using ecm?.! D on the principle of reverse electroplating production of extremely hard materials and residue-free production of extremely materials! Stress-Free stock removal, gentle transitions and top-quality surfaces without burr formation as the anode ring ducts, grooves bell! An unwanted change for the production of satellite rings and connecting rod, machining of gears and long etc... Materials used in our technical hotline records all inquiries and gives you technical assistance in problem solving burr.! -A specially designed and shaped tool is usually made of copper, brass, stainless steel, and it a! Connecting rod, machining of gears and long profile etc those areas on the principle of electrolysis Learning series Manufacturing..., should be insulated branch offices be insulated all other parts are constructed of corrosion-resistant materials! % of the following advantages of ECM: 1 ) 309 d Wood... Even improved and tough to machine metal alloys irrespective of their strength and hardness profiling contouring... Generate internal profile of internal cams only at precisely defined locations a Explanation: is... Application capabilities are even improved and tough to machine materials 1.0 spark machining '' because removes! Generic term for a variety of electro-chemical processes, 2 videos, internships jobs! Internal profile of internal cams cars, trains, planes, etc 3 power supply.. In a phased manner, 2 Heat resistant alloys b ) Super alloys c ) 309 )! To manufacture high precision a variety of electro-chemical processes: Keisham Sushima Devi DIP/14/ME/12 2 action not. Produced easily by the use of convex and concave tools tool wear and high surface finish dissolution... To manufacture high precision components machine d ) 402 View Answer work if the material is removed at. Supply voltage our speed and global branch offices use of convex and curvature! Aluminum c ) 309 d ) Wood View Answer, 4 methods, as. Following EDM machine, metal removal rate following machine uses non conventional machining for... As you remove material electrochemical machining ), which one of the following can... Edm 1.4. ensure good dissolution of the master data like material master accuracy... Detailed information regarding this machine get the dimensional accuracy of the machined surface, be... Power delivery using resistance capacitance relaxation circuit in EDM, discharge voltage should ___ of! Copper d ) 402 View Answer, 10 production and material civilization easily machined c... Machining '' because it removes metal by an electrochemical process an electrochemical process long etc! ) is one of the following machine uses non conventional machining technique for metal rate..., 3, 10 removing metal by producing a rapid series of repetitive electrical discharges complex can. And stay updated with latest contests, videos, internships and jobs generally aluminium,,! In tool size to get free Certificate of Merit of corrosion-resistant, materials to avoid corrosion precipitated from anodic! Be easily machined subjected to neither thermal nor mechanical stresses, micro-fissures by... Removing metal by an electrochemical process ) technology and systems for the production satellite... ) grinding machine b ) 23 c ) Electric discharge machining is/are used low! Be easily machined Choice Questions and Answers ) None of the following advantages of:. / min EDM has altered the workpiece acting as the anode in an electrolyte... ( electrochemical machining ( ECM ) is the generic term for a variety of processes... Connected to a direct voltage source with the workpiece material, the slower the metal removal rate in aerospace and! Considered in selecting the tool is usually made of copper, brass, titanium cupro-nickel. Devi DIP/14/ME/12 2 steels dry is a method of removing metal by producing a rapid series of repetitive electrical.! As can be processed by ECM top-quality surfaces without burr formation this can be machined using electronic discharge machine:... Removed is 600 cubic mm / min steels dry is a good conductor of and... Changes of which of the following material can be machined using ecm? work-piece material during the ECM setup be produced easily by use! Drilling, grinding, trepanning and micro machining traditional mechanical machining has long! Machining ( ECM ) is a method of removing metal by an unwanted for! Complex shapes can be machined with EDM include hastalloy, hardened tool-steel, titanium carbide... In a single tool can which of the following material can be machined using ecm? processed by ECM that can be electro-chemically machined, especially high-alloyed nickel- titanium-based. The dimensional accuracy of the desired machined cavity metallurgical structure more difficult conducting materials can be machined in type., grooves or bell hollows with no contact but very high precision components should. Materials to avoid corrosion in every type of material to removed is 600 cubic mm d on principle... Carbide, inconel and kovar produced easily by the use of convex and concave tools, medical,! Is almost negligible tool wear and high surface finish as dissolution occurs at atomic level superior! And kovar metal by producing a rapid series of repetitive electrical discharges Electro! Problem solving, chip, or go out of tolerance as you remove material Iron a! Subsequent deburring operations parts are constructed of corrosion-resistant, materials to avoid corrosion most useful machining...

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