Electric heating – Metal heating – Cutting or disintegrating
Patent
1986-07-15
1988-03-22
Pellinen, A. D.
Electric heating
Metal heating
Cutting or disintegrating
20412925, 2041295, 219 69G, 219 69S, 219 69V, B23H 726
Patent
active
047330406
ABSTRACT:
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.
REFERENCES:
patent: 4135070 (1979-01-01), Pfau et al.
patent: 4361745 (1982-11-01), Rupert et al.
patent: 4564912 (1986-01-01), Schwefel
patent: 4608476 (1986-08-01), Shimizu
"ISOCUT", Charmilles Erowa, Feb. 1978.
Pelloni Norman
Prati Antonio
AG fur industrielle Elektronik AGIE Losone bei Locarno
Evans Geoffrey S.
Pellinen A. D.
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