Comment. 3 Schematic representation of crater formation in EDM process. Electrical discharge machining (EDM), also known as spark machining, spark eroding, burning, die sinking, wire burning or wire erosion, is a manufacturing process whereby a desired shape is obtained by using electrical discharges. The mechanism of material removal in EDM process is. Tool and work part materials should be electrically conductive, and the absence of (a) Copper and brass (b) Aluminium and graphite (c) Silver tungsten and copper tungsten (d) Cast iron 2. Interviewmania is the world's largest collection of interview and aptitude questions and provides a comprehensive guide to students appearing for placements in India's most coveted companies. 3 Schematic representation of crater formation in EDM process. surface. The major research development resulting in improvement in material removal rate is summarized in Table 1in chronological order. Then again, when micro-holes, micro-slots and micro-molds. The machining process in electrical discharge machining (EDM) consists of a melting process and a removal process. In Electrical discharge machining; a potential difference is applied across the tool and w/p in pulse form. making. Join now. and mechanism of material removal in EDM. Question: Is The Mechanism Of Material Removal In EDM Better Described As Mechanical Shearing, Fracture From Impact, Thermal Melting And Vaporization, Or Chemical Reaction/etching? Aptitude Data Interpretation Verbal Reasoning Non Verbal Reasoning Verbal Ability Programming General Knowledge Puzzle. Join now. This set of Advanced Machining Processes Multiple Choice Questions & Answers (MCQs) focuses on “EDM-Mechanism of Material Removal – 1”. Correct Answer : A. The material is removed from a workpiece, without any mechanical force on the workpiece using an electrical current that passes between an electrode and a workpiece, which is separated by a dielectric liquid. CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): The aim of this paper is to study the Electro discharge machining process. Modelling of Material Removal and Product Quality Material removal in EDM mainly occurs due to intense localised heating almost by point heat source for a rather small time frame. Metal removal rate is usually expressed as cubic inches per hour (in3/hr), but in fact could just as realistically be expressed as $/hr. Out of all the unconventional machining methods, EDM is the one which gives highest MRR, Melting and evaporation is the mechanism for chip formation, the mechanical properties of work piece material will not affect the material removal rate (MRR). Discussion; Pankaj Chaugule -Posted on 19 Nov 15 - 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. EDM has been an important manufacturing process for the tool, mould, and dies industries for several decades. … The working principle of EDM process is based on a series of non-stationary electrical discharge which remove material from a workpiece [15,16]. EDM is mainly used to machine difficult-to-machine materials and high strength temperature resistant alloys. Question: 1. Watch Queue Queue Log in. The mechanism of material removal in EDM process is. Share this question with your friends. Accordingly, these regions seem to be playing an important role in the removal phenomena of the molten metal on the EDM process; that is, it is concluded that the molten metal in the crater might be removed in the form of small particles from the workpiece showing the same removal mechanism as the case of mercury electrode. After the explosion is over, how is the debris carried away? Ask your question. The machinability and the material removal mechanisms were discussed of Fcc-TiBCN block in wire-cut EDM. See the answer. The most common material removal processes, sometimes referred to as conventional or traditional machining, are those that mechanically cut away small chips of material using a sharp tool. Kanpur 1/Issue 3/2013/0001) zones (HAZ) of the workpiece … EDM can cut intricate contours or cavities in pre-hardened steelwithout the need for heat treatment to soften and re-harden them. Since the early seventies, researchers worldwide have attempted to model the electric discharge phenomena (plasma channel) and the mechanism of cathode and anode erosion in the EDM process. It also involves direct energy dissipated in the EDM process… EDM is used to machine intricate profiles, small diameter drillings and hard materials [1]. This video is unavailable. The mechanism of material removal in EDM process is - 18798051 The mechanism of material removal in EDM process is A) Erosion and Cavitations B) Cavitations and Evaporation C) Melting and Evaporation D) Melting and Corrosion INTRODUCTION Electro Discharge Machining (EDM) is an electro-thermal non- traditional machining process, where electrical energy is used to generate electrical spark and material removal mainly occurs due to thermal energy of the spark. D. Cavitations and Evaporation. MECHANISMS OF MATERIAL REMOVAL IN THE CMP PROCESS The Chemical Mechanical Polishing (CMP) process is now widely employed in the manufacture of Ultra-Large-Scale Integrated (ULSI) circuits. Yet, the effects of various process parameters on the material removal rate (MRR) and the resulting surface topography are not well understood. In. Electrical discharge machining, or EDM, is a non-traditional method in which material is removed from a workpiece using thermal energy. The dielectric medium works as a deionizing medium and provides the … The tool and workpiece must be electrically conductive and a small gap is maintained in between them. Assisted magnetic field is an important technique, successfully applied to electrical discharge machining process. Firstly, a series of MF-EDM experiments on selected magnetic material (SKD11) and selected non … This problem has been solved! 1. Explain. Watch Queue Queue s. for optimal performance. Behaviors of liquid metal (mercury) caused by a transient arc discharge in water (The maximum current is about 125 A of which duration is about 68μs) are studied in relation to the removal mechanism of the electrical discharge machining (EDM). Non-conventional machining processes may use chemical or thermal means of removing material. In the heat transfer mechanism, heat conduction is known to be the main major mode. It was first observed in 1770 by Joseph Priestley Fcc-TiBCN block in wire-cut EDM such as laser,! 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