Wire supply device on a machine for spark erosion of workpieces
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United States of America Patent
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-
Jan 19, 1999
Grant Date -
N/A
app pub date -
Jul 28, 1997
filing date -
May 11, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electrode wire (20) is withdrawn from a pay-off spool (22), passed around guide rolls (24-30) to a machining span (32), and finally wound up on a take-up spool (40). The electrode wire (20) is guided in such a way that it always moves in the same plane at right angles to the axes, both when being wound up on the take-up spool (40) and when being unwound from the pay-off spool (22). Both spools (22, 40) are supported on a common carrier member (50) which is displaceable in axial direction of the spools (22, 40). A measuring device (70) is disposed between the pay-off spool (22) and the first guide roll (24) to detect deviations of the position of the electrode wire (20) from a predetermined position. The carrier member (50) is connected to a slide drive (60) which corrects any deviation detected of the position of the electrode wire (20) being unwound from the pay-off spool (22) by axially shifting the carrier member (50). Thus it also makes sure that the spent electrode wire (20) is wound up properly on the take-up spool (40).
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