Current supply device for movable electrodes of spark erosion machines
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United States of America Patent
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Feb 13, 1990
Grant Date -
N/A
app pub date -
Feb 15, 1989
filing date -
Feb 16, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A current supply device for movable electrodes of spark erosion machines comprises a plurality of individual contacts and includes in leads connecting the contacts with a current generator, electrical components in the form of pulse transformers for a pairwise negative feedback of partial currents or additional impedances stepped according to a mathematical series for uniform current distribution over the individual contacts. The current supply device is particularly suitable for the current transmission of high energy short pulses, such as are used for an erosive wire cutting. The current supply device operates in an almost wear-free manner and can also fulfill the function of guide for the electrode.
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