For electrochemical machining of steel, generally a neutral salt solution of sodium chloride nacl is taken as the electrolyte. Chemical and photochemical machining manpreet singh litt uid 16017 department of. The power needed to operate the ecm is obviously electrical. In the process, workpiece is taken as anode and tool is taken as cathode. Chemical machining chm electrochemical machining ecm as the name suggests, chm is one chemical energy based ntm process. Electrochemical machining ecm, electrochemical deburring. Chemical milling, blanking, engraving and photochemical. Pdf study of electrochemical machining process for drilling hole.
Erosion of the work material by a high velocity stream of abrasives or. In the course of improving the slow and expensive copy milling of coal briquetng rollers, koppern installed one of the european contnents first. Pdf machinablity study on electrochemical machining a. Electrochemical machining ecm is a metalremoval process based on the principle of reverse electroplating. Electrochemical machining processes provide a viable alternative for drilling macro and microholes with exceptionally smooth surface and reasonably acceptable taper in numerous industrial applications particularly in aerospace, electronic, computer and micromechanics industries. Chapter 5 electrochemical based hybrid machining iit kanpur. The two electrodes workpiece and tool is immersed in an electrolyte such as nacl. Electrochemical machining ecm is a nontraditional machining ntm process belonging to electrochemical category.
Grinding, mechano electrochemical machining, electrochemical honing. Introduction to nontraditional machining iit kanpur. Let us take an example of machining of low carbon steel which is primarily a ferrous alloy mainly containing iron. Chemical and photo chemical machining manpreet singh litt uid 16017 department of. The electrolyte in ecm should have high electrical conductivity, low viscosity, high specific heat, chemical stability, resistance to form a passivating film on the workpiece surface, non.
A nonuniform distribution of material removal rate on machining surface results in changes of workpiece shape. In ecm this rate is equal to velocity of anodic dissolution v. Electrochemical machining ecm seminar with pdf report. Electrochemical machining ecm is a machining process in which electrochemical process is used to remove materials from the workpiece. On this channel you can get education and knowledge for general issues and topics. Aim of the presentation give brief information about electro chemical machining process show the ecms working principles and tools define the advantages and disadvantages brief informations about application areas, economics, products and developments. Pdf electrochemical machining is a metal machining technology based on electrolysis where the product is processed without contact and thermal.
Chemical discharge machining, a new method for trueing and dressing of. A current of electrolyte fluid carries away the deplated material before it has a chance to reach the machining tool. Laserecm, electrochemical discharge machiningecdm, combined electrochemical. Electro chemical machiningecm hacettepe universitesi. Here material is removed in ionic form due to controlled dissolution by chemical etchant. In electro chemical machining an electrolyte acts as a current carrier. Electro chemical machining consists of following basic elements. Electro chemical machining ecm is the generic term for a variety of electrochemical processes. Etchant slowly dissolves metal to realize machining. The electrolyte and water undergoes ionic dissociation as shown below as potential difference is applied. The cavity produced is the female mating image of the tool shape.
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