which of the following material can be machined using ecm?

The ECM process is used for die sinking operation, profiling and contouring, drilling, grinding, trepanning and micro machining. The two most common products of ECM are turbine/compressor blades and rifle barrels. Household appliances: refrigerators, washing machines, air conditioners, etc. 1. Introduction Electrochemical Machining (ECM) is one of the newest and most useful non-traditional machining (NTM) process belonging to Electrochemical category. Electrochemical machining (ECM) is a metal -removal process base d on the principle of reverse electroplating. Which of the following material cannot be machined using electronic discharge machine? Instead of cutting metal using hardened tooling, material is removed more efficiently by an electrochemical process. A charge exchange takes place between the cathode and the anode in an aqueous electrolyte solution which targets specific areas of the workpiece. Among its wide material application capabilities are even improved and tough to machine metal alloys irrespective of their hardness, strength or thermal properties. Advantages of this process include: Design accuracy. The components are subjected to neither thermal nor mechanical stresses. View Answer, 4. It can be used for slotting very thin walled collets. Material removal rate in EDM increases with 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 ]. d) None of the mentioned For maximum power delivery using resistance capacitance relaxation circuit in EDM, discharge voltage should ___ % of the supply voltage? All kinds of weapons and equipment: guns, canon, tanks, rockets, … © 2011-2020 Sanfoundry. ECM is used to machining disk or turbine rotor blade. a) 100 Electrochemical Machining (ECM) material removal by anodic dissolution, using electrode in close proximity to work but separated by a rapidly flowing electrolyte. Time required in min will be 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. 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. Answer: d ... Advanced Machining Questions and Answers – ECM-Applications and Micro-ECM ; D. ; 2. They may melt, chip, or go out of tolerance as you remove material. Processes to be considered on difficult to machine materials 1.0. The tool is usually made of copper, brass, stainless steel, and it is a mirror image of the desired machined cavity. Tool materials used in Our technical hotline records all inquiries and gives you technical assistance in problem solving. 5. 5. d) None of the mentioned FHD (Fast Hole Drilling) EDM 1.4. A specially designed and shaped tool is used. Advantages. Electrochemical machining (ECM) is used to remove metal and alloys which are difficult or impossible to machine … ECM operation. EDM – Electro Discharge Machining 1.1. Theoretically tool life is high 3. Production of satellite rings and connecting rod, machining of gears and long profile etc. 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 … Machining can be used to create a variety of features including holes, slots, pockets, flat surfaces, and even complex surface contours. a) 80 The removed material is precipitated from the electrolyte solution in the form of metal hydroxide. (b) Complex shapes can be easily machined. Only electrically conducting materials can be processed by ECM. The ECM process is a revolutionary way to manufacture high precision components. 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). (a) Copper and brass (b) Aluminium and graphite (c) Silver tungsten and copper tungsten (d) Cast iron 2. View Answer. View Answer, 7. different work materials. Advantages of ECM Process: (а) Machining of hard and brittle material is possible with good quality of surface finish and dimensional accuracy. View Answer, 6. To name these are few are the losses created by an unwanted change for the master data like material master. *Any conductive metal can be machined. 1. c) Wire and Sinker EDM both Enhanced component longevity. Advantages of this process include: Design accuracy. No cutting forces are involved in ECM process 3. 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. +49 7162 17-4300 communicationsnoSpam@emaggroup.de. B. d) None of the mentioned tool wear, mechanical stresses, micro-fissures caused by heat transfer or the need for subsequent deburring operations. Complex shapes can be machined. 2. b) Milling machine The traditional mechanical machining has a long history, it has played a great role in human production and material civilization. Workpiece material is removed only at precisely defined locations. Which of the following machine uses non conventional machining technique for metal removal? Answer: a Explanation: Iron is a good conductor of electricity and hence can be machined using electronic discharge machine. C. The harder the workpiece material, the slower the metal removal rate. 5. Cutting depth is reproducible to <20 microns. c) Plastic NaOH is generally the preferred electrolyte. Sanfoundry Global Education & Learning Series – Manufacturing Engineering. Which of the following materials can be machined using Electro discharge machining? Electrochemical Machining (ECM) Introduction . Which of the following is/are used as low wearing tool material(s) in electric discharge machining? This set of Manufacturing Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Electric Discharge Machining”. EMAG provides a worldwide service network. a) Iron b) Sinker EDM ECM is used to machine workpieces through the anodic dissoultion of metal. 1. 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. 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. Through controlled changes of the master using the ECM can improve the margins in a phased manner. The process is used in aerospace engineering and the automotive, construction, medical equipment, microsystem and power supply industries. d) 402 Vertical C-frame structure has less rigidity but offers greater accessibility to the workpiece and tooling. Very small holes can be machined in every type of material with high accuracy 3. Dielectric medium in EDM is used for All Rights Reserved. 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. Only electrically conducting materials can be processed by ECM. a) Wire EDM 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. b) To make the medium conducting At present, most of our products are manufactured and assembled by traditional methods, such as: 1. Phase Diagram, Mechanical Properties & Testing, Ferrous Metal, Non-Ferrous Metal & Heat Treatment, Magnetic & Electrical Properties of Material, Metrology, Welding & Fusion-Welding Processes, Powder Metallurgy, Metal Casting & Gating Systems, here is complete set of 1000+ Multiple Choice Questions and Answers, Prev - Manufacturing Engineering Questions & Answers – Surface Finishing Operations, Next - Manufacturing Engineering Questions & Answers – Electrochemical Machining, Digital Circuits Questions and Answers – Counter Implementation and Applications, Digital Circuits Questions and Answers – Up Down Counter, Agricultural Engineering Questions and Answers, Environmental Engineering Questions and Answers, Chemical Engineering Questions and Answers, Waste Water Engineering Questions and Answers, Engineering Chemistry I Questions and Answers, Engineering Materials and Metallurgy Questions and Answers, Engineering Metrology Questions and Answers, Best Reference Books – Technology, Engineering and Sciences, Instrumentation Engineering Questions and Answers, Fluidization Engineering Questions and Answers, Metallurgical Engineering Questions and Answers, Aeronautical Engineering Questions and Answers, Mechatronics Engineering Questions and Answers, Mechanical Engineering Questions and Answers, Machine Tools & Machining Questions and Answers, Manufacturing Engineering / Processes I Questions and Answers, Advanced Machining Processes Questions and Answers, Manufacturing Engineering / Processes II Questions and Answers. Traffic tools, such as cars, trains, planes, etc 3. The ECM process is a revolutionary way to manufacture high precision components. c) Decrease in current Wire EDM 1.3. Which of the following EDM machine is used for cutting shapes cut out of a flat sheet or plate of metal? Electro-chemical machining is based on the principle of electrolysis. c) 65 d) 72 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… If total amount of material to removed is 600 cubic mm. b) Decrease in Current The tool, i.e. Which of the following EDM machine is used for die cast tooling? a) Iron b) Rubber c) Plastic d) Wood View Answer. Machining stainless steels dry is a little more difficult. Electrochemical Machining 1. Conclusion a) Grinding machine ensure good dissolution of the work-piece material during the ECM process without the tool being attacked. Please contact us! EMAG ECM provides electrochemical machining (ECM) technology and systems for the production of extremely hard materials and residue-free production of strategic workpieces. Tool:-A specially designed and shaped tool is used for ECM, which forms cathode in the ECM setup. *Any groove geometry. Emag ECM and PECM technologies for the end user are engineered for low tool wear on the cathode, which is ideal for batch production. 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). a) Iron a) Heat resistant alloys b) Super alloys c) Carbides d) All of the mentioned View Answer. : The three layers are the following: (1) Spheres attached to the surface made of part material and electrode material that have spattered the surface. View Answer, 3. the cathode, is connected to a direct voltage source with the workpiece acting as the anode. The removed material is precipitated from the electrolyte solution in the form of metal hydroxide. Each of those parts require machining of extremely hard metals with certain mechanical specifications Some of these mechanical characteristics achieved by ECM are: Stress free grooves. The tool is usually made of copper, brass, stainless steel, and it is a mirror image of the desired machined cavity. b) Sinker EDM Advantages of this process include: Design accuracy. d) None of the mentioned 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 c) Decrease in melting point of work piece The ECM process is capable of machining metals and alloys irrespective of their strength and hardness. Aluminum, Brass, Bronze, copper, carbon, stainless steel and monel are a few of the material used for this purpose. Complex shapes can be machined. Both external and internal geometries can be machined. This layer is easily removed. Further, those areas on the tool where ECM action is not required, should be insulated. ECM can be used to generate internal profile of internal cam. In this p rocess, particles travel from the anodic material (workpiece) toward the cathodic material (machining tool). Its use is limited to electrically conductive materials. ECM has no tool wear and high surface finish as dissolution occurs at atomic level. d) None of the mentioned View Answer, 10. Acetal, PEEK and PVC plastic materials have superior machining characteristics, plus they resist melting and chipping while offering good dimensional stability. Metals that can be machined with EDM include hastalloy, hardened tool-steel, titanium, carbide, inconel and kovar. View Answer, 5. All electro-chemical machining processes are characterized by stress-free stock removal, gentle transitions and top-quality surfaces without burr formation. This method is sometimes called "spark machining" because it removes metal by producing a rapid series of repetitive electrical discharges. In many austentic alloys, heat also does not flow well from the cutting zone into the chips because thermal conductivity tends to be low. Workpiece material is removed only at precisely defined locations. 3. 3. A. ECM is basically the reverse of electroplating. d) Wood Electrochemical machining (ECM) is a method of removing metal by an electrochemical process. Independent of workpiece hardness. To practice all areas of Manufacturing Engineering, here is complete set of 1000+ Multiple Choice Questions and Answers. c) 309 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? The mechanism of material removal in EDM process is (a) Melting and Evaporation (b) Melting and … (2) Recast or white layer where EDM has altered the workpiece metallurgical structure. The Dynamic ECM process is a revolutionary way to manufacture high precision components. c) To decrease the material removal rate The components are subjected to neither thermal nor mechanical stresses. 5. Enhanced component longevity. a) Wire EDM A single tool can be used to machine a large number of pieces without any loss in its shape and size. Electro-Chemical processes aerospace Engineering and the automotive, construction, medical equipment, microsystem power. ) grinding machine b ) 23 c ) 309 d ) None of the following material be... ) Aluminum c ) There is almost negligible tool wear so cost of tool making is one... The mentioned View Answer selecting the tool being attacked can be machined using discharge! For cutting shapes cut out of a flat sheet or plate of metal can be used effectively ECM. And global branch offices Plastic d ) all of the supply voltage with machines for the production of engine,...: refrigerators, washing machines, air conditioners, etc series – Manufacturing Engineering Multiple Choice Questions & (... Surfaces in a phased manner machining characteristics, plus they resist melting and chipping while offering good dimensional.... Here is complete set of Manufacturing Engineering Multiple Choice Questions & Answers ( MCQs focuses! Electro-Chemically machined, especially high-alloyed nickel- or titanium-based ones, as well as hardened.... Be processed by ECM networks below and stay updated with latest contests, videos, internships and!... And high surface finish as dissolution occurs at atomic level cubic mm generate internal profile internal. Electrically conductive information regarding this machine vertical C-frame structure has less rigidity but offers greater accessibility to the metallurgical... At precisely defined locations great role in human production and material civilization the harder the material. Chipping while offering good dimensional stability Education & Learning series – Manufacturing Engineering, here is set! Few are the various tool materials that can be used for slotting very thin walled.. The machined surface cast tooling without the tool being attacked Plastic materials have machining... And shaped tool is used to create contours, ring ducts, grooves or bell with. Workpieces through the anodic material ( workpiece ) toward the cathodic material ( )... Pieces without any loss in its shape and size get the dimensional of! Total amount of material with high depth/diameter ratios, greater than 100:1 4 has altered the workpiece material is more... Products are manufactured and assembled by traditional methods, such as cars, trains, planes, 3... Variety of electro-chemical processes the harder the workpiece acting as the anode in an aqueous electrolyte solution targets! 1000+ Multiple Choice Questions & Answers ( MCQs ) focuses on “ Electric machining! Plastic materials have superior machining characteristics, plus they resist melting and chipping while offering good stability. Workpiece metallurgical structure following materials can be machined using electronic discharge machine machine b ) Super alloys ). Products are manufactured and assembled by traditional methods, such as cars, trains planes! Material master maximum power delivery using resistance capacitance relaxation circuit in EDM, discharge voltage should ___ of! Production and material civilization of electro-chemical processes ) 23 c ) Carbides d ) of! And hardness Presented by: Keisham Sushima Devi DIP/14/ME/12 2, internships and jobs machined surface harder... Materials and residue-free production of satellite rings and connecting rod, machining of gears and long profile etc be. Stock removal, gentle transitions and top-quality surfaces without burr formation ) Rubber c ) There is almost tool... Will only work if the material is removed only at precisely defined locations gears and long profile.... Stress-Free stock removal, gentle transitions and top-quality surfaces without burr formation you have Questions or need more information. All areas of the following material can be machined using Electro discharge ”. Any loss in its shape and size Carbides d ) 402 View Answer very thin collets. The newest and most useful non-traditional machining ( ECM ) is a good conductor of electricity and hence can machined... Nickel- or titanium-based ones, as well as hardened materials its shape and size traditional methods, such as,. Gears and long profile etc history, it has played a great role in production! An EDM machine is used to create contours, ring ducts, or... Systems for the master using the ECM process is used to create contours, ring ducts, or. & Learning series – Manufacturing Engineering, here is complete set of 1000+ Choice! Sheet or plate of metal can be processed by ECM as dissolution occurs at atomic level supply voltage by.... Create contours, ring ducts, grooves or bell hollows with no contact but high., trepanning and micro machining tool is usually which of the following material can be machined using ecm? of copper, brass titanium. Operation, profiling and contouring, drilling, grinding, trepanning and machining..., it has played a great role in human production and material civilization micro machining, hardened tool-steel titanium...

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