Abstract
A transistorized pulse generator has been used to study the effect of changing the voltage pulse off-time, at constant values of pulse on-time, on the machining characteristics of electrodischarge machined AISI Tl high-speed steel. A copper electrode with positive polarity, kerosene dielectric, side flushing and a current setting of 31.2 A were used throughout all of the experiments. The results have shown that the metal removal rates are not very sensitive to off-time changes at a low pulse on-time corresponding to finish machining and show a higher sensitivity to these changes at higher on-times corresponding to intermediate and rough machining. Volumetric electrode wear has been found to be less with shorter off-times when finish machining but independent of the off-time when intermediate or rough machining. The values of the surface roughness of the machined specimens have been found to be independent of the off-time and direction of flushing, for all machining conditions.
Original language | English |
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Pages (from-to) | 287-291 |
Number of pages | 5 |
Journal | Journal of Materials Processing Technology |
Volume | 61 |
Issue number | 3 |
DOIs | |
Publication status | Published - Sept 1996 |
Keywords
- Electrodischarged machined steel
- Voltage pulse off-time
ASJC Scopus subject areas
- Ceramics and Composites
- Computer Science Applications
- Metals and Alloys
- Industrial and Manufacturing Engineering