Electrical discharge machining edm is one of the earliest nontraditional machining processes. Experimental investigation of process parameters for hole. Edm performance measures such as material removal rate, tool wear rate, and surface roughness are influenced by different process parameters 1. Wire electrical discharge machining has become an important nontraditional machining process, as it provides an effective solution for producing components. Moulton edm network sugar grove, il usa today, as we embrace the 21st century, there are far greater demands for higher precision in machining, ease of operation, and increased longevity of both the parts, and the. An approach to optimize the edm process parameters using. Thus, it is essential to understand the influence of various factors on edm process. It is also known as spark machining or spark eroding process principle in this process, electrical energy is used to generate the spark between the tool and workpiece submerged under the dielectric medium so that material removal takes place from the surface of the workpiece by local melting or vaporization. This paper summarizes the grey relational theory and taguchi optimization technique, in order to optimize the cutting parameters in wire edm for ss304. Feb 26, 2015 references a b theoretical models of the electrical discharge machining process. Optimizing process parameters of spark and wire cut edm. In this paper, an attempt has been made to carry out multiobjective optimization of the material removal rate mrr and roughness parameter ra for the edm process of. A thermoelectric model of material removal during electric discharge machining. The signi cance of the process parameters on the overall quality characteristics of the edm process was also evaluated quantitatively using the analysis of variance anova method.
In this machining process the controlling parameters and their levels are given in table 1. However, these optimization techniques have not been used in the optimization of the electrical discharge machining edm. To avoid most of this barreling effect and wire trailoff, some wire edm machines automatically slow down in corner cutting. In manufacturing process edm stands for electrical discharge machining. Also individual effect of process parameters on performance characteristics was studied. Optimization of process parameters during edm of stainless. The quality of the product mainly depends upon the material and process parameters. The servo system prevents the electrode from touching the workpiece.
In this study, the authors were investigated the variation of tool wear rate with the varying process parameters. Modeling and analysis of edm process parameters using taguchi. Important process parameters in edm are peak current i. However, ram edm produces the sparks along the surface of a formed electrode, as in figure 9. Understanding the wire edm process 85 the sharper the corner, the greater the overcut and undercut.
Optimization of edm process parameters becomes difficult due to more number of machining variables and slight changes in a single parameter significantly affect the process. Kumar 5 employed grey relational methodology to optimize input parameters of edm to maximize mrr. Optimal results were veri ed through additional experiments. Different author use different combination of process parameters.
Study of the parameters in electrical discharge machining. Surface roughness and kerf width are of crucial importance in the field of machining processes. Abstract in this work, al 7075 was considered as the workpiece material due to. Experimental investigation of process parameters for hole drilling edm of al 7075 arunbharathi. Pdf optimization of process parameters in edm for machining. Pdf optimization of process parameters of edm using anova. Wedm, recast layer, microhardness, taguchi method, design of experiment. Analytical and statistical methods are used to select best combination of process parameters for an optimum machining performance. The analysis of the experimental observations highlights that the metal removal rate, electrode wear ratio, gap size and surface roughness in electrical discharge machining are greatly influenced by the various dominant process parameters considered in the present study. Wire edm is one of the nontraditional machining processes.
A servo mechanism maintains the gap between the electrode and the workpiece. Pdf this paper presents investigation and optimization of electric discharge machining edm parameters using taguchi method. International journal for research in applied science. Edm process is based on thermoelectric energy between the work. An approach to optimize the edm process parameters using desirabilitybased multiobjective pso arindam majumdera, pankaj kumar dasa, abhishek majumderb and moutushee debnatha amechanical engineering department, national institute of technology agartala, barjala, jirania. Abstract electrical discharge machining, commonly known as edm, is a process that is used to remove metal through the action of an electrical discharge of short duration and high current density between the tool and work piece. Electrical discharge machining edm is a nonconventional machining process that is used for machining of hardtomachine. Analysis of process parameters in wire edm with stainless steel using single objective. Fundamentals of ram edm 141 ram edm, like wire edm, is a spark erosion process. Machining parameters optimization of wedm process using.
Experimental investigation of wire edm process parameters on mrr of ti6al4v alloy parveen kr. There are no physical cutting forces between the tool and work piece. The edm is very complex and stochastic process and is. Process parameters that mostly affected the edm process are pulse on time, pulse off time, discharge current. Some researcher have studied the influence of variation in edm process parameters on mrr out of which, lin et al investigated on the performance parameters in edm process for niti sma by variation in machining parameters. Material is removed from the work piece by a series of rapidly recurring current discharges between two electrodes, separated by a dielectric liquid. It is the duration of time expressed in micro seconds in whom the peak current is ready to flow in every cycle. A comparison study on optimization of process parameters. On and off time are much more than just a switching cycle. Wedm process is also regarded as a very slow material removal process, which limits its further applications greatly. Pdf optimization of the process parameters of wire cut edm a. Three process parameters chosen were pulse ontime ton, duty factor and discharge current or pulse current. The process of automating one or more edm machines is similar to that of other conventional machine tools. Optimization of the edm process is concerned with maximizing mrr while minimizing twr, the finish should be as smooth as possible.
Experimental investigation of process parameters on. Analysis of process parameters in wire edm with stainless steel using single objective taguchi method and multi objective grey relational grade. Sharma, department of mechanical engineering, iit roorkee. Edm process is based on thermo electric energy between the work piece and an electrode. The design of experiment doe analysisbased optimization is the evolutionary algorithms which were used by positively by the various investigators. Pdf optimization of process parameters of edm using. Prajapati and patel 2 evaluated the effect of pulse on time, pulse off time, voltage, wire feed and wire tension on. He found that, machining efficiency can be improved by regulating low peak current and large pulse duration rate. From this, wedm process parameters can be adjusted to achieve better metal removal rate, surface finish and cutting width simultaneously. Three process parameters chosen were pulse ontime ton, duty factor and.
For the performance characteristic of overcut per side, the levels a1b1c2 including discharge current of 3amp, pulse on duration of 0. Analysis of edm parameters influencing on material removal. Mathematical modeling and optimization of process parameters. Optimization of edm process parameters through teaching. The significance of the process parameters on the quality characteristics of the edm process was also evaluated quantitatively using the analysis of variance anova method. Wire electrical discharge machining wedm is an advanced thermal machining process capable of accurately machining parts with complicated shapes, especially for. Multi response optimization of wireedm process parameters of. Electrical discharge machining is one of the advanced unconventional machining processes. The electrical energy is directly used to remove or cut the metals. The aim of this paper is to study the influence of pulse on time, pulse off time, gap voltage, peak current and. National institute of technology rourkela certificate this is to certify that the thesis entitled parametric optimization of process parameters submitted to the national for edm of. Optimization of wire electrical discharge machining process parameters using taguchi method gijoy s1, abhilash s s2, hari krishnan s j3 1,2department of mechanical engineering, sree chitra thirunal college of engineering, trivandrum, kerala, india 3ug student, department of mechanical engineering, sct college of engineering, trivandrum. An approach to optimize the edm process parameters using desirabilitybased multiobjective pso arindam majumdera, pankaj kumar dasa, abhishek majumderb and moutushee debnatha amechanical engineering department, national institute of technology agartala, barjala, jirania, agartala 799055, india.
The proper selection of its process parameters is essential to increase production rate and to improve product quality. Multiobjective optimization of edm process parameters. P 2 1assistant professor, sri krishna college of engineering and technology, india. Parametric optimization of process parameters for edm of.
The use of taguchi method with grey relational analysis to. Modeling and analysis of edm process parameters using. Effects of process parameters on machining characteristics. Pdf the effects of the machining parameters in wire electrical discharge machining wedm, by varying pulse on time, pulse off time, gap voltage and. Generally, workpieces are mounted on a pallet system and the automation changes the pallets in and out of a chuck on the machine, said langenhorst. The process parameters in edm are used to control the performance measures of the machining process.
Pdf optimization of edm process parameters using taguchi method. The different process parameters of edm are shown in the fishbone diagram figure 2 with output parameters mrr, twr and ra. Introduction wire edm machining also known as spark edm is an electro thermal production process in which a thin single. Experimental investigation of wireedm process parameters on. Assistant professor, department of mechanical engineering, tagore engineering college, chennai 127.
Introduction electric discharge machining edm is an extensively used unconventional manufacturing. Optimization of process parameters during edm of alsic. Inconel 718 is one of the alloys that have relatively poor machinability in the. The objective of this paper is to investigate the optimum process parameters for a particular work piecetool material combination on fuzzy logic control based electrical discharge machine. Electrical discharge machining, modeling, optimization, process parameters 1. Experimental investigation of edm process parameters in machining. Optimization of electrical discharge machining process. Introduction the history of edm techniques goes as far back as the 1770s when it was discovered by english scientist, joseph priestly.
He noticed in his experiments that electrical discharges had removed material from the electrodes. Edm process parameters by various techniques on different dielectric media, material of work piece and electrode material. Influence of process parameters on electric discharge. Introduction there ex ists variants of electrical discharge machining edm process which consists of s inker edm, wire edm and rapid hole d rilling edm. Optimization of machine process parameters in edm for en. Study of the parameters in electrical discharge machining through response surface methodology approach. Experimental investigation of process parameters on inconel 925 for edm process by using taguchi method vishal kumar jaiswal1 amitesh paul2 vikas yadav3 vijay singh4 1,3,4pg student m. Pdf optimization of wire edm process parameters for. Pdf optimization of process parameters in electric. Modeling and optimization of edm process parameters on. Optimization of process parameters in edm for machining of. Volume 33, issue 12, december 2009, pages 43974407. Electrical discharge machining, orthogonal array, signaltonoise ratio, grey relational analysis i.
Pdf optimization of edm process parameters using taguchi. This paper presents investigation and optimization of electric discharge machining edm parameters using taguchi method. Pulse on time, pulse off time and discharge current were the process parameters selected for this experiment. Analysis of process parameters in wire edm with stainless steel using single objective taguchi method and multi objective grey relational grade m. This is to certify that the thesis entitled parametric optimization of process parameters submitted to the national for edm of stainless steel 304 institute of technology, rourkela deemed university by narendra kumar patel roll no. Electrical discharge machining, commonly known as edm, is a process that is used to remove metal through the action of an electrical discharge of short duration and high current density between the tool and work piece. This paper describes an investigation of edm process optimization using copper electrodes. Experimental investigation of process parameters on inconel. Review on effects of process parameters in wire cut edm.
Investigation of machining parameters on electrical discharge machining edm is important for manufacturing industries for achieving higher productivity and product quality. L9 orthogonal array sk d11 alloy steels and concluded that both approaches can generally improve process responses such as electrode wear ratio, metal removal. Optimization of edm process parameters using taguchi method. Saini, mukesh verma abstract the objective of the present work was to investigate the effect of the wire electrical discharge machining process parameters on material removal rate of titanium alloy using taguchi approach. Introduction the quality of a product is the main factor for showing growth of a company. Objective of work this work considered the process parameters like discharge current, voltage, spark on time as they have major influence on mrr, twr and sr and to obtain the common optimum values of process parameters for three responses. Pdf wire electrical discharge machining is an extremely important machining process among newly developed nontraditional machining.
Investigation and optimization of process parameters in. Like any other machining processes, the performance of edm is signi cantly a ected by its process parameter settings. Parameters for edm of stainless steel 304 submitted to the national institute of. Tech 1,2,3,4department of mechanical engineering 1,3,4sri satya sai college of engineering, rkdf university, bhopal 2rkdf university, bhopal. The experiments were performed on a newly designed experimental setup developed in. Analysis of edm process parameters for optimization of. The variable mass, cylindrical plasma model singh, a. References a b theoretical models of the electrical discharge machining process. Analysis of process parameters in wire edm with stainless. Electrical discharge machining is assessed on the basis of material removal rate mrr, tool wear rate twr, and surface roughness sr. Analysis of edm parameters influencing on material removal rate and surface roughness of high speed steel pardeep kumar abstract in present scenario, high speed steel tools are more popular because of their good toughness at high hardness, high wear resistance, and relatively high abrasion resistance properties.
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