EP 0410875 A1 19910130 - Electrode for plasma arc torch, and torch using such an electrode.
Title (en)
Electrode for plasma arc torch, and torch using such an electrode.
Title (de)
Elektrode für Plasmalichtbogenbrenner und entsprechender Brenner.
Title (fr)
Electrode pour torche de travail à l'arc plasma, et torche correspondante.
Publication
Application
Priority
FR 8910224 A 19890728
Abstract (en)
[origin: JPH03151169A] PURPOSE: To improve reliability of ignition by providing so that the support end arranged around an insert has at least a portion made of an electroconductive material axially projecting with respect to the insert. CONSTITUTION: At the end of using an oxidizing plasma-forming gas such as air or oxygen for a period, the center part of an insert 14 is formed into a crater 15 the periphery of which is covered with an annular projection 16 made of zirconium oxide or hafnium oxide. The existence of a hole 11 prevents the annular projection 16 from protruding beyond the end face 9 of the support 10, so that ignition by short-circuit can be continued in a sure way.
Abstract (fr)
Le support (10) de l'électrode (2) présente à son extrémité un lamage (11) dans le fond duquel est monté l'insert émissif (16) en zirconium ou en hafnium. Application aux torches de coupage plasma à allumage par court-circuit.
IPC 1-7
IPC 8 full level
B23K 10/00 (2006.01); H05H 1/34 (2006.01)
CPC (source: EP KR US)
H05H 1/34 (2013.01 - EP US); H05H 1/3442 (2021.05 - EP KR); H05H 1/3489 (2021.05 - EP KR); H05H 1/3442 (2021.05 - US); H05H 1/3489 (2021.05 - US)
Citation (search report)
- [YD] EP 0144267 A2 19850612 - SOUDURE AUTOGENE FRANCAISE [FR], et al
- [A] US 4059743 A 19771122 - ESIBIAN EDUARD MIGRANOVICH, et al
- [Y] WELDING INTERNATIONAL. vol. 2, no. 10, 1988, ABINGTON GB pages 870 - 873; D A DUDKO: "effect of methods of producing thermochemical electrodes on their service life in welding plasma torches"
- [Y] WELDING INTERNATIONAL. vol. 1, no. 9, 1987, ABINGTON GB pages 816 - 820; S I POLOSKOV: "EVALUATING THE LIFE OF NON-CONSUMABLE ELECTRODES IN THE ARC WELDING OF ALUMINIUM ALLOYS"
- [A] PATENT ABSTRACTS OF JAPAN vol. 13, no. 300 (M-848)(3648) 11 juillet 1989, & JP-A-01 91972 (MATSUSHITA) 11 avril 1989,
Designated contracting state (EPC)
AT BE CH DE DK ES GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0410875 A1 19910130; EP 0410875 B1 19940302; AT E102431 T1 19940315; CA 2021836 A1 19910129; CA 2021836 C 19951219; DE 69006965 D1 19940407; FR 2650470 A1 19910201; FR 2650470 B1 19920904; JP H03151169 A 19910627; JP H0642991 B2 19940608; KR 910004074 A 19910228; NO 903178 D0 19900717; NO 903178 L 19910129; PT 94835 A 19920228; PT 94835 B 19970528; US 5083005 A 19920121
DOCDB simple family (application)
EP 90402132 A 19900725; AT 90402132 T 19900725; CA 2021836 A 19900724; DE 69006965 T 19900725; FR 8910224 A 19890728; JP 19320490 A 19900723; KR 900011358 A 19900726; NO 903178 A 19900717; PT 9483590 A 19900727; US 55209290 A 19900713