Electric heating – Metal heating – Cutting or disintegrating
Patent
1998-06-17
2000-10-10
Evans, Geoffrey S.
Electric heating
Metal heating
Cutting or disintegrating
219 6917, 219 6918, B23H 100, B23H 704
Patent
active
06130395&
ABSTRACT:
A wire-cut EDM method and apparatus for machining to a fine surface roughness of 1 .mu.m Rmax or less. Two power supplies and a electrode polarity switching system are used. A first high energy power source is used for initial profile cutting and may also be used for one or more later cuts while the machining pulse parameters, and feed rate and offset are adjusted for increasing less rough surface finishes. The wire electrode is held at negative machining potential. A second power supply and smaller offset values are used for later cuts to create lower values of surface roughness, while still maintaining the wire electrode at a negative machining potential. Finally, in order to create a fine finished surface (Rmax.ltoreq.1 .mu.m), the offset is further reduced and the wire electrode polarity is reversed.
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Kaneko Yuji
Kuloda Tatsuo
Sadamitsu Daisuke
Toyonaga Tatsuo
Devinsky Paul
Evans Geoffrey S.
Sodick Co. Ltd.
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