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AssigneeAG fur industrielle Elektronik AGIE Losone bei Locarno
InventorsNorman Pelloni, Antonio Prati
Estimating the term…
To eliminate short-circuits between a countersink electrode and a workpiece during countersink erosion, when a short-circuit occurs, the countersink electrode is initially moved back by a predetermined path length (.delta.) along the previously travelled path from a first locus (P.sub.K) at which the short-circuit occurred to a second locus or intermediate point (P.sub.R) and it is established at that location whether there is still a short-circuit. If this is the case, the countersink electrode is moved in an upwardly sloping manner along a second path (R), which has a first angle (.alpha.) with respect to the working plane (AE) and has a movement component (R.sub.1) having a second angle (.beta.) with respect to a surface normal to the short-circuit or intermediate point (P.sub.K or P.sub.R). All the parameters (.alpha.,.beta.,.delta.,.vertline.R.vertline.) can be freely preselected and are variable during erosion.
For use with an electroerosion machine, a method for the controlled withdrawal movement of a countersink electrode that has eroded an opening in a workpiece and in doing so has travelled along a given path and wherein there is a short circuit between the countersink electrode and the workpiece at a short-circuit point (P.sub.K) on said path, said method comprising the steps of initially moving the countersink electrode back along said path for a length (.delta.) from the short-circuit point (P.sub.K) to an intermediate point (P.sub.R) to establish where there is still a short-circuit and, if the short-circuit is still present, moving the countersink electrode for a second time along a second and different path (R) away from the intermediate point (R.sub.K).
Dependencies are inferred from the claim text.