L'air Liquide, Societe Anonyme a Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude

La Soudure Autogene Francaise

L'air Liquide, Soci&eacute;t&eacute; Anonyme &aacute; Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Proc&eacute;d&eacute;s Georges Claude

L'air Liquide, Soci&#xe9;t&#xe9; Anonyme Pour L'etude Et L'exploitation Des Proc&#xe9;d&#xe9;s Georges Claude

Jean-Marie Fortain

Philippe Lefebvre

Jean-Yves Mouton

Gerard Plottier

André Borne

Christian Bonnet

Eric Verna

Andre Borne

Laurent Biskup

Gérard Plottier

Didier Marchand

Christian Reymond

Thomas Opderbecke

Jean-Yves Square De l'Echiquier Mounton

The invention relates to a wire-guide/nozzle assembly () for an electric arc welding torch, comprising at least one nozzle () for delivering gas and at least one wire-guide system () for guiding at least one consumable wire, characterized in that the downstream end () of the wire-guide system () runs into the nozzle (). The peripheral wall of the nozzle () has at least one cut-out () through which the wire-guide system () passes. The wire-guide system () is fastened to the nozzle (). The TIG welding torch comprises a wire-guide/nozzle assembly ().

Wire-guide nozzle assembly for a robotic TIG welding torch

A method of brazing galvanized metal parts such as those used for motor vehicle elements or container components. The parts are joined together to create a brazed joint by using at least one electric arc, a metal filler wire, and a gas shield. The gas shield contains hydrogen, carbon dioxide, and argon.

Ternary gas mixture which can be used in the braze welding of galvanized parts

An electric-arc welding process for assembling parts that are components of a motor vehicle, in which a consumable wire is used that is subjected to a cyclic mechanical movement. The wire is moved closer to and then further away from the parts to be welded so as to create a short arc between the end of the consumable wire and at least one of the parts to be joined. In this way, molten metal is deposited in order to progressively produce a welded joint between the parts.

Method of welding motor vehicle elements, in particular tailored blanks

A wire-guide/nozzle assembly for an electric arc welding torch, with at least one nozzle for delivering gas and at least one wire-guide system for guiding at least one consumable wire, distinguished in that the downstream end of the wire-guide system runs into the nozzle. The peripheral wall of the nozzle has at least one cut-out through which the wire-guide system passes. The wire-guide system is fastened to the nozzle. A TIG welding torch utilizing such a wire-guide/nozzle assembly.

Wire-guide/nozzle assembly for a robotic TIG welding torch

Hybrid welding process using a laser beam and an electric arc to produce a weld bead. The electric arc is established between an electrode connected to a first pole of a current source and at least one workpiece to be welded and connected to a second pole of a current source via at least one electrically conducting earth contactor in contact with the workpiece to be welded. To obtain effective welding, a contact is made between the earth contactor and the workpiece to be welded laterally and/or upstream of the point of impingement of the electric arc on the workpiece(s) to be welded, and considering the direction of formation of the welded joint, so as to balance the forces associated with the induced electromagnetic field acting on the puddle of liquid metal.

Hybrid arc/laser welding with earth contactor position control

Process for the MIG welding of nickel and nickel alloys, with the use of a gas shield for at least part of the welding zone, in which process the gas shield is a gas mixture containing from 0.05% to 0.5% CO , the balance being argon. Advantageously, the gas mixture also contains, by volume, from 15 to 50% helium, preferably from 17% to 30% helium, or from 0.1% to 10% hydrogen by volume and preferably from 1% to 7% hydrogen by volume.

Process for the MIG welding of nickel and nickel alloys with a shielding gas based on argon and CO2

For MIG welding, either in a spray mode without current modulation or in a pulsed mode, of aluminum and aluminum alloys, with the use of a gas shield for at least part of the welding zone, the gas shield is a gas mixture consisting, by volume, of from 0.01% to 1.80% oxygen and from 15% to 98.2% helium, and any balance being argon.

Process for the MIG welding of aluminum and its alloys with a shielding gas of the Ar/He/O2 type

The process includes shielding of at least part of the welding zone with a gas mixture consisting of 1.2 to 1.70% oxygen and the balance being argon.

Process for the MIG welding of aluminium and its alloys in pulsed mode or unmodulated-spray mode

The invention relates to a plasma arc welding process and a plasma arc welding device for aluminum and its alloys, which process comprises at least one step of initiation of a pilot arc by means of an auxiliary current which is delivered by an auxiliary current source and flows in a pilot-arc circuit, one step of feeding with plasma gas, one step of initiation of a main arc by means of a main current which is delivered by a main current source and flows in a main circuit, one step of cyclic variation of the polarity of the main current so as to obtain at least one phase of descaling the material to be welded with a first current polarity and at least one phase of welding the material with a second current polarity, and in which process the supply of auxiliary current to the pilot-arc circuit is stopped during the descaling phase and the main circuit and to the pilot-arc circuit are supplied with main current.

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Osny, France

Jean-Marie Fortain