Chemical and electrochemical machining pdf

On this channel you can get education and knowledge for general issues and topics. Let us take an example of machining of low carbon steel which is primarily a ferrous alloy mainly containing iron. Electro chemical machiningecm hacettepe universitesi. 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.

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. Pdf machinablity study on electrochemical machining a. Here material is removed in ionic form due to controlled dissolution by chemical etchant. Electrochemical machining ecm, electrochemical deburring. In electro chemical machining an electrolyte acts as a current carrier. A current of electrolyte fluid carries away the deplated material before it has a chance to reach the machining tool. Chemical and photo chemical machining manpreet singh litt uid 16017 department of. The two electrodes workpiece and tool is immersed in an electrolyte such as nacl. Etchant slowly dissolves metal to realize machining.

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. 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. Chapter 5 electrochemical based hybrid machining iit kanpur. Grinding, mechano electrochemical machining, electrochemical honing. Introduction to nontraditional machining iit kanpur. Chemical machining chm electrochemical machining ecm as the name suggests, chm is one chemical energy based ntm process. Chemical milling, blanking, engraving and photochemical. The electrolyte and water undergoes ionic dissociation as shown below as potential difference is applied. Erosion of the work material by a high velocity stream of abrasives or. Electrochemical machining ecm give a better alternative in generating accurate three. 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. Laserecm, electrochemical discharge machiningecdm, combined electrochemical. 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.

Electro chemical machining ecm is the generic term for a variety of electrochemical processes. Pdf study of electrochemical machining process for drilling hole. In the process, workpiece is taken as anode and tool is taken as cathode. For electrochemical machining of steel, generally a neutral salt solution of sodium chloride nacl is taken as the electrolyte. Chemical discharge machining, a new method for trueing and dressing of. Chemical and photochemical machining manpreet singh litt uid 16017 department of. In ecm this rate is equal to velocity of anodic dissolution v. Pdf electrochemical machining is a metal machining technology based on electrolysis where the product is processed without contact and thermal. Electrochemical machining ecm is a metalremoval process based on the principle of reverse electroplating. A nonuniform distribution of material removal rate on machining surface results in changes of workpiece shape. Electrochemical machining ecm is a method of removing metal particules by an electrochemical process instead of standart machining. In the course of improving the slow and expensive copy milling of coal briquetng rollers, koppern installed one of the european contnents first. The cavity produced is the female mating image of the tool shape. The power needed to operate the ecm is obviously electrical.