A study on the effect of tool electrode thickness on MRR, and TWR in electrical discharge turning process

Turning by electrical discharge machining (EDM) is an emerging area of research. Generally, wire-EDM is used in EDM turning because it is not concerned with electrode tooling cost. In EDM turning wire electrode leaves cusps on the machined surface because of its small diameters and wire breakage whi...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2018-04, Vol.346 (1), p.12036
Main Authors: Gohil, Vikas, Puri, YM
Format: Article
Language:English
Subjects:
Diameters
Die sinking
EDM electrodes
Electric discharge machining
Electrodes
Free form
Hand tools
Machine shops
Process parameters
Stainless steels
Surface finish
Thickness
Tooling
Turning (machining)
Wire
Workpieces
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Summary:Turning by electrical discharge machining (EDM) is an emerging area of research. Generally, wire-EDM is used in EDM turning because it is not concerned with electrode tooling cost. In EDM turning wire electrode leaves cusps on the machined surface because of its small diameters and wire breakage which greatly affect the surface finish of the machined part. Moreover, one of the limitations of the process is low machining speed as compared to constituent processes. In this study, conventional EDM was employed for turning purpose in order to generate free-form cylindrical geometries on difficult-to-cut materials. Therefore, a specially designed turning spindle was mounted on a conventional die-sinking EDM machine to rotate the work piece. A conductive preshaped strip of copper as a forming tool is fed (reciprocate) continuously against the rotating work piece; thus, a mirror image of the tool is formed on the circumference of the work piece. In this way, an axisymmetric work piece can be made with small tools. The developed process is termed as the electrical discharge turning (EDT). In the experiments, the effect of machining parameters, such as pulse-on time, peak current, gap voltage and tool thickness on the MRR, and TWR were investigated and practical machining was carried out by turning of SS-304 stainless steel work piece.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/346/1/012036