Global Patent Index - EP 1480776 A1

EP 1480776 A1 2004-12-01 - METHOD FOR PLASMA-OXYACETYLENE CUTTING FERROUS METALS

Title (en)

METHOD FOR PLASMA-OXYACETYLENE CUTTING FERROUS METALS

Title (de)

PLASMA-SAUERSTOFFSCHNEIDVERFAHREN VON EISENMETALLEN

Title (fr)

PROCEDE D OXYCOUPAGE PLASMA DES METAUX FERREUX

Publication

EP 1480776 A1 (FR)

Application

EP 03712260 A

Priority

  • FR 0300156 W
  • FR 0202140 A

Abstract (en)

[origin: WO03070413A1] Disclosed is a method for operating an installation used for plasma-oxyacetylene cutting metallic workpieces that contain at least one ferrous material. Said installation comprises a central nozzle (1) delivering an oxygen-containing gas stream for cutting, an intermediate nozzle (2) used as an electrode (9), which is coaxially aligned with the central nozzle (1) and delivers a first annular plasma jet, and a peripheral nozzle (3) which delivers a second annular plasma jet and is coaxially aligned with the intermediate nozzle (2). The workpiece is preheated in an initiation area, pierced across the entire thickness of the workpiece to be cut, and then cut according to a desired cutting kerf. The nozzle (1) is electrically insulated from the electrode (2) and from any other part of the installation having the same potential as the electrode while the inventive method is carried out.

IPC 1-7 (main, further and additional classification)

B23K 10/00

IPC 8 full level (invention and additional information)

B23K 10/00 (2006.01); H05H 1/34 (2006.01)

CPC (invention and additional information)

B23K 10/00 (2013.01); H05H 1/34 (2013.01); H05H 2001/3452 (2013.01); H05H 2001/3457 (2013.01)

Citation (search report)

See references of WO 03070413A1

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT SE SI SK TR

EPO simple patent family

WO 03070413 A1 20030828; WO 03070413 A8 20041021; EP 1480776 A1 20041201; FR 2836079 A1 20030822; FR 2836079 B1 20040402

INPADOC legal status


2006-08-30 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20060301

2005-02-09 [RIN1] INVENTOR (CORRECTION)

- Inventor name: CAMPY-PEYRET, FREDERIC

2004-12-01 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20040812

2004-12-01 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT SE SI SK TR