International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 04 Issue: 07 | July -2017
p-ISSN: 2395-0072
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MACHINING OF BOROSILICATE GLASS WITH ECDM USING DIFFERENT ABRASIVES Balwinder Singh1, R O Vaishya2, Vikas Sheel3 Department of Production & Industrial Engineering, PEC University of Technology, Chandigarh, India ---------------------------------------------------------------------------***---------------------------------------------------------------------------
Abstract - The specific requirements of advanced
the aspect ratio are some of the few constraints when using these processes. Electro chemical discharge machining (ECDM) then came in picture which can cut non conducting materials like diamond, ruby, Quartz, Pyrex Glass, e-glass ceramics, advanced composites and Fiber reinforced plastics (FRP) etc. the best thing with this method is we can machine with very high precision with very less tool wear but the time consumption is more which can be controlled. Machining is done using the combined principle of ECM and EDM i.e. discharge and chemical etching. Electro chemical discharge machining (ECDM) is said to be a hybrid machining of Electro chemical machining (ECM) and Electro discharge machining (EDM) but actually it is not a hybrid of these two processes as in ECM process current is high and voltage is low but in EDM voltage is high and current is low. Whereas in ECDM even with low current and voltage combination machining can be done. The voltage and current may vary depending on the material and other parameters selected.
materials in advanced industries like nuclear reactor, automobiles, aeronautic have raise the need of advance machining processes which can machine such materials with high material removal rate as well as desired surface quality. Electrochemical discharge machining (ECDM) is one of the hybrid advance machining processes which have potential to machine advance materials with good surface quality desired by Industries. The selection of parameter for higher material removal rate, higher surface finish and minimum tool wear rate is very essential during ECDM. In this present review Paper, a study of the effective Parameters of ECDM has been carried out with their specific role in material removal and surface finish. The optimized range of parameters by different optimizing techniques has been summarized. The objective of the present study is to analyse the machining performance of abrasive assisted TW-ECDM using straight polarity to get maximum Material Removal Rate (MRR) and minimum Surface Roughness and analysing the significance of the affecting parameters.
Present paper deals with the effect of various process parameters on material removal rate (MRR) and Surface Roughness (SR). There are many process parameters for ECDM but in our present study we consider type of electrolyte, electrolyte concentration and type of abrasive. All the experiments were done keeping the voltage constant at 30V. This level of voltage was considered after analyzing the previous research papers.
Key Words: Optimization Techniques, Electrochemical Discharge Machining, Material Removal Rate, Surface Roughness.
1. INTRODUCTION Hybrid machining processes are the current machining methods now a days ruling the industries where precision accuracy and nature of workpiece is the major concern. A number of non-conventional methods are available now a days depending on the application and advantages various different type of workpiece can be machined. Materials can be conductive as well as non-conducting hence depending on their nature we have to select which method will be best suited like conducting materials can be easily and precisely with ECM and EDM and various more methods. But when the material is non-conducting then limited methods are available laser beam machining (LBM), ultra sonic machining(USM), abrasive jet machining(AJM), abrasive water jet machining(AWJM), electron beam machining (EBM), and ion beam machining (IBM), Size and
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2. LITERATURE REVIEW Kellogg (1950) laid the foundation of the electrochemical discharge machining (ECDM) by studying the anode effects on molten salt. Contact Glow Discharge Electrolysis (CDGE) a new name came into existence (Hickling and Ingram, 1964). Kurafuji and Suda (1968) termed the process as electrical discharge drilling. Tool electrode material and electrolyte composition were discussed in their studies and had demonstrated the drilling of micro holes in glass. Then the another name was given to the process “Discharge machining of non-conductors” by Cook et al. (1973), they stressed that the process reported by earlier researchers was different from ECM and EDM. They
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