EDM Parameters of Silver Tungsten Alloy(b)

After the selection process is regulated quasi-polar and other process parameters, most of the artifacts are generally divided into coarse, medium, fine in order to convert several gage, both to ensure the technical requirements of the workpiece, but also to ensure the highest possible overall production efficiency. Select electric gage order should be determined according to the principal contradiction. Such as processing cavity mold, electrode wear ratio must be less than 1 percent, according to the requirements of the electrode should be selected loss ratio and peak current pulse width for roughing, then the production efficiency, rough degree in secondary position considered.

Such as precision machining small module gear die, in addition to side rough-givers, the main consideration should be to select the appropriate discharge gap, to ensure that they meet the requirements of the die gap.

Select the pulse interval of time, when roughing take long pulse width of 1 / 5-1 / 10, finishing 2-5 times to take the pulse width, pulse between the large, low productivity, but the width is too small, the processing unstable, arcing.

Processing area hours should not choose too large peak current, otherwise within the electrode gap is too thick causing galvanic corrosion product discharge centralized, easy arcing. Therefore, in the beginning may be rough few actual processing area should be temporarily reduce or increase the peak current pulse interval, or deliberately timed to strengthen carrying knives, electric fire until after the discharge area increases, the current increases to normal value. With increasing depth of processing should also be strengthened accordingly carrying knives and punch, pumping chip functions.




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