Patents Assigned to Air Liquide Welding France
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Publication number: 20120024831Abstract: The invention relates to a laser cutting method for cutting a stainless steel workpiece using laser beam generation means comprising a silica fibre with an ytterbium-doped core to generate the laser beam. Preferably, the laser beam generated by the ytterbium-based fibre has a wavelength between 1.07 and 1.09 ?m, a quality factor of the laser beam is between 0.33 and 8 mm.mrad, and the laser beam has a power of between 0.1 and 25 kW. The assistance gas for the laser beam is chosen from nitrogen, helium, argon and mixtures thereof, and, optionally, it further contains one or more additional compounds chosen from O2, CO2, H2 and CH4.Type: ApplicationFiled: June 2, 2011Publication date: February 2, 2012Applicants: La Soudure Autogene Francaise (Air Liquide Welding France), L'Air Liquide Societe Anonyme Pour I'Etude et I'Exploitation des Procedes Georges ClaudeInventors: Francis BRlAND, Karim CHOUF, Hakim MAAZAOUI
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Publication number: 20120012570Abstract: The invention relates to a laser cutting method for cutting a C—Mn steel workpiece, characterized in that laser beam generation means comprising at least one silica fiber with an ytterbium-doped core is used to generate the laser beam. Preferably, the ytterbium-based fiber has a wavelength between 1.07 and 1.1 ?m, preferably 1.07 ?m, the quality factor of the laser beam is between 0.33 and 8 mm.mrad, and the laser beam has a power of between 0.1 and 25 kW. The assistance gas for the laser beam is chosen from nitrogen, helium, argon, oxygen, CO2 and mixtures thereof, and, optionally, it further contains one or more additional compounds chosen from H2 and CH4.Type: ApplicationFiled: June 2, 2011Publication date: January 19, 2012Applicants: L'Air Liquide Welding France (La Soudure Autogéne Française, L'Air Liquide Société Anonyme pour I'Etude et I'Exploitation des Procédés Georges ClaudeInventors: Francis Briand, Karim Chouf, Hakim Maazaoui
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Publication number: 20100012638Abstract: The invention relates to a braze-welding or arc-welding method using a TIG torch equipped with a non-consumable electrode (1) and a consumable filler wire (2) of a given diameter, wherein the transfer of metal to the welded joint occurs in successive droplets of molten metal deposited at a frequency of between 20 Hz and 90 Hz, and the size of said drops is between 1, 2, and 4 times the diameter of the consumable wire.Type: ApplicationFiled: July 12, 2007Publication date: January 21, 2010Applicant: Air Liquide Welding FranceInventors: Jean-Marie Fortain, Olivier Revel
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Publication number: 20080245775Abstract: An automated method for detecting the wear of a non-consumable electrode of an arc welding torch and for automatically replacing or remachining the electrode when it is eroded with a fresh electrode includes the following steps: a) the number of strikes performed by the electrode in question, and possibly the arc time of the electrode and the strike time for establishing the arc, is measured or counted during welding; b) the value of at least one of the wear-indicating parameters determined in step a) is compared with at least one preset respective reference value; and c) the eroded electrode is replaced with a fresh or sharpened electrode when the value of at least one of the wear-indicating parameters is equal to or exceeds at least the preset respective reference value.Type: ApplicationFiled: September 25, 2007Publication date: October 9, 2008Applicants: L' AIR LIQUIDE SOCIETE ANONYME POUR L' ETUDE ET L' EXPLOITATION DES PROCEDES GEORGES CLAUDE, AIR LIQUIDE WELDING FRANCEInventors: Thomas Opderbecke, Sebastien Gadrey
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Publication number: 20080190898Abstract: The invention relates to a storage packet for welding flux, in the form of a bag (1) containing welding flux (5) and with at least one layer of thermo-welded polymer (3a, 3b) and at least one metal film (2), superimposed one on the other and a structure with flexible deformable walls forming said bag (1), characterized in that said bag (1) is hermetically sealed and pressured within the bag is less than atmospheric pressure. The invention further relates to a method for storage of welding flux in such packet.Type: ApplicationFiled: April 6, 2006Publication date: August 14, 2008Applicants: Oerlikon GMBH, Air Liquide Welding FranceInventor: Stephan Starck
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Publication number: 20070119834Abstract: The invention relates to a laser cutting method for cutting a stainless steel workpiece using laser beam generation means comprising a silica fibre with an ytterbium-doped core to generate the laser beam. Preferably, the laser beam generated by the ytterbium-based fibre has a wavelength between 1.07 and 1.09 ?m, a quality factor of the laser beam is between 0.33 and 8 mm.mrad, and the laser beam has a power of between 0.1 and 25 kW. The assistance gas for the laser beam is chosen from nitrogen, helium, argon and mixtures thereof, and, optionally, it further contains one or more additional compounds chosen from O2, CO2, H2 and CH4.Type: ApplicationFiled: November 15, 2006Publication date: May 31, 2007Applicants: L'Air Liquide Societe Anonyme pour I'Etude et I'Exploitation des Procedes Georges Claude, La Soudure Autogene Francaise (Air Liquide Welding France)Inventors: Francis Briand, Karim Chouf, Hakim Maazaoui
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Publication number: 20070119833Abstract: The invention relates to a laser cutting method for cutting a C-Mn steel workpiece, characterized in that laser beam generation means comprising at least one silica fiber with an ytterbium-doped core is used to generate the laser beam. Preferably, the ytterbium-based fiber has a wavelength between 1.07 and 1.1 ?m, preferably 1.07 ?m, the quality factor of the laser beam is between 0.33 and 8 mm.mrad, and the laser beam has a power of between 0.1 and 25 kW. The assistance gas for the laser beam is chosen from nitrogen, helium, argon, oxygen, CO2 and mixtures thereof, and, optionally, it further contains one or more additional compounds chosen from H2 and CH4.Type: ApplicationFiled: November 15, 2006Publication date: May 31, 2007Applicants: L'Air Liquide Societe Anonyme pour I'Etude et I'Exploitation des Procedes Georges Claude, Air Liquide Welding France (La Soudure Autogene Francaise)Inventors: Francis Briand, Karim Chouf, Hakim Maazaoui