Chemical and electrochemical machining pdf

Erosion of the work material by a high velocity stream of abrasives or. Electrochemical machining ecm is a machining process in which electrochemical process is used to remove materials from the workpiece. Here material is removed in ionic form due to controlled dissolution by chemical etchant. For electrochemical machining of steel, generally a neutral salt solution of sodium chloride nacl is taken as the electrolyte. The two electrodes workpiece and tool is immersed in an electrolyte such as nacl. Electrochemical machining ecm give a better alternative in generating accurate three. Pdf machinablity study on electrochemical machining a. Introduction to nontraditional machining iit kanpur. Electro chemical machining ecm is the generic term for a variety of electrochemical processes. Chemical and photo chemical machining manpreet singh litt uid 16017 department of.

A nonuniform distribution of material removal rate on machining surface results in changes of workpiece shape. Electro chemical machiningecm hacettepe universitesi. On this channel you can get education and knowledge for general issues and topics. Chapter 5 electrochemical based hybrid machining iit kanpur. Chemical milling, blanking, engraving and photochemical. Electrochemical machining ecm is a method of removing metal particules by an electrochemical process instead of standart machining. Chemical and photochemical machining manpreet singh litt uid 16017 department of. Let us take an example of machining of low carbon steel which is primarily a ferrous alloy mainly containing iron. Jet electrochemical machining jecm process can be used to machine conductive materials but there is a stray machining effect which leads to reduce the effectiveness of machining.

Grinding, mechano electrochemical machining, electrochemical honing. There are many specifications to this power, the current density must be high, the difference between the tool and the work piece must be low for higher accuracy, thus the voltage must be low to avoid a short circuit and the control system uses some of this electrical power. 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. Electro chemical machining consists of following basic elements. Pdf electrochemical machining is a metal machining technology based on electrolysis where the product is processed without contact and thermal. Laserecm, electrochemical discharge machiningecdm, combined electrochemical. Electrochemical machining ecm seminar with pdf report. In ecm this rate is equal to velocity of anodic dissolution v. In the process, workpiece is taken as anode and tool is taken as cathode. Electrochemical machining ecm is a metalremoval process based on the principle of reverse electroplating. Electrochemical machining ecm, electrochemical deburring.

Chemical discharge machining, a new method for trueing and dressing of. The electrolyte and water undergoes ionic dissociation as shown below as potential difference is applied. 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. In electro chemical machining an electrolyte acts as a current carrier. 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 study of electrochemical machining process for drilling hole. In the course of improving the slow and expensive copy milling of coal briquetng rollers, koppern installed one of the european contnents first. A current of electrolyte fluid carries away the deplated material before it has a chance to reach the machining tool. Chemical machining chm electrochemical machining ecm as the name suggests, chm is one chemical energy based ntm process. Etchant slowly dissolves metal to realize machining.