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Percentage of harmful discharges for surface current density monitoring in electrical discharge machining process
Blatnik, Oki (Author), Valentinčič, Joško (Author), Junkar, Mihael (Author)

URLURL - Presentation file, Visit http://dx.doi.org/10.1243/09544054JEM816 This link opens in a new window

Abstract
Electrical discharge machining (EDM) is performed in the gap between the workpiece (usually the anode) and the electrode (usually the cathode). The gapis filled with a dielectric and the pulses generated by a special generatorcause an electrical breakdown in the gap. A breakdown discharge occurs which removes material from the workpiece. The EDM process has been used for more than 50 years, but the influence of the surface current density on the process stability is not well understood. The surface current density is very important in the case of the machining of rough surfaces where the highest material removal rate (MRR) is preferred. For a given eroding surface there exists an optimal electrical current at which the highest MRR is achieved. It is reported in the literature that the percentage of the discharges that are harmful to the EDM process depends on the surface current density in the gap. Thus, experiments were performed to find out the possibility of using the percentage of harmful discharges to monitor the surface current density of the EDM process.

Language:English
Keywords:elektroerozivne obdelave, obdelave površin, grobe obdelave, električni tok, gostota toka, stabilnost procesov, obraba orodij, electrical discharge machining process, spark erosion, discrimination, surface current density, rough machining, machining surface, process stability, tool wear
Work type:Not categorized (r6)
Tipology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Year:2007
Number of pages:str. 1677-1684
Numbering:Letn. 221, št. 12
UDC:621.9.048
ISSN on article:0954-4054
COBISS.SI-ID:10335515 Link is opened in a new window
Views:420
Downloads:277
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Record is a part of a journal

Title:Proceedings of the Institution of Mechanical Engineers
Shortened title:Proc. Inst. Mech. Eng., B J. eng. manuf.
Publisher:Mechanical Engineering Publications
ISSN:0954-4054
COBISS.SI-ID:26744064 This link opens in a new window

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