Electric heating – Metal heating – Cutting or disintegrating
Patent
1985-04-18
1987-04-28
Pellinen, A. D.
Electric heating
Metal heating
Cutting or disintegrating
204206, 204224M, 219 69R, 269 71, B23H 702, B23Q 104
Patent
active
046616780
ABSTRACT:
In a travelling wire EDM apparatus for effecting a cut by electrical discharges on a workpiece blank by an electrode wire, the workpiece blank is supported by two support members mounted on a rotary table, one support member being disposed in the interior of the perimeter of the cutting path and the other support member being disposed exteriorly to the perimeter of the cutting path such as to support the two portions of the workpiece blank severed from each other during the cutting operation. A partial cut is first effected through the workpiece blank and the workpiece blank is subsequently angularly oriented to a different position by rotating the rotary table such that collision between any one of the electrode wire support arms and the workpiece blank support member disposed within the perimeter of the cutting path is prevented. The cut is continued along a cutting path corrected as a function of the new angular position of the workpiece, and at the end of the cut the portion severed from the workpiece blank is supported by the support member disposed within the perimeter of the cutting path and the remaining of the workpiece blank is supported by the other support member.
REFERENCES:
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patent: 3731044 (1973-05-01), Ullmann et al.
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patent: 4547646 (1985-10-01), Briffod
patent: 4553483 (1985-11-01), Votteler et al.
Charmilles Technologies S.A.
Evans Geoffrey S.
Pellinen A. D.
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