Electric heating – Metal heating – Cutting or disintegrating
Patent
1988-05-31
1991-07-23
Paschall, M. H.
Electric heating
Metal heating
Cutting or disintegrating
219 6914, 219 6915, B23P 114
Patent
active
050345893
ABSTRACT:
Electrical discharge apparatus for producing on the surface of an electrically conductive workpiece a textured or matt finish comprises a plurality of electrodes each connectable to an electrical power source and each carried by a head which in use of the apparatus can be moved linearly of the workpiece with the electrodes each spaced at a predetermined distance from the workpiece surface. A characteristics of the voltage conditions present within the gap existing between the electrodes and the workpiece surface is monitored and, the head is moved towards and away from the workpiece surface to maintain the monitored characteristic within predetermined limits. Dielectric fluid is retained within the gap existing between the electrodes and the workpiece surface, and a series of discrete electrical discharges is promoted between each electrode and the adjacent workpiece surface to cause particles to be removed from the workpiece surface and produce a textured or matt finish thereto.
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Evans Gareth A.
Savidge David H.
Wilson Geoffrey
Paschall M. H.
Sarclad International Limited
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