Loading patent…
AssigneeL'Air Liquide, Societe Anonyme a Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procedes Georges Claude
InventorsPhilippe Lefebvre, Jean-Marie Fortain, Christian Bonnet
Estimating the term…
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.
A process for welding one or more metal workpieces to be welded or assembled by using at least one laser beam and at least one electric arc to produce at least one weld bead, said electric arc being struck between at least one electrode and the at least one workpiece to be welded, the electrode being connected to a first pole of at least a first current source and connected to a second pole of the at least first current source, at least two electrically conducting earth contactors in contact with said workpiece to be welded, wherein at least one contact is made between the at least two earth contactors and the workpiece(s) to be welded laterally and/or upstream of a point of impingement of the electric arc on the workpiece(s) to be welded, when considering a direction of formation of a welded joint, said earth contactors being electrically isolated from one another.
A process for welding at least two metal workpieces to be assembled by using at least one laser beam and at least one electric arc to produce at least one weld bead, said electric arc being struck between at least one electrode and the at least one workpiece to be welded, the electrode being connected to a first pole of at least a first current source and connected to a second pole of the at least first current source, at least one electrically conducting earth contactor in contact with said workpieces to be welded, wherein at least a first contact is made between at least a first earth contactor and one of the workpieces to be welded laterally and/or upstream of a point of impingement of the electric arc on the workpieces to be welded, considering a direction of formation of a welded joint, and at least a second contact is made between at least a second earth contactor and the other workpiece to be welded laterally and/or upstream of the point of impingement of the electric arc on the workpieces to be welded, considering a direction of formation of the welded joint, said first and second contacts being symmetrical with respect to a longitudinal axis of the weld bead produced at the junction of said workpieces, and the first and second earth contactors being electrically isolated from one another.
A process for welding one or more metal workpieces to be welded or to be assembled by using at least one laser beam and at least one electric arc to produce at least one weld bead, said electric arc being struck between at least one electrode and the at least one workpiece to be welded, the electrode being connected to a first pole of at least a first current source and connected to a second pole of the at least first current source, at least one electrically conducting earth contactor in contact with said workpiece to be welded, wherein the shape and/or flow of current lines are/is controlled in the workpiece(s) to be welded between a point of impingement of the electric arc on said workpiece(s) and at least two electrically conducting earth contactors in contact with said workpiece to be welded, so as to balance forces associated with an induced electromagnetic field which act on a puddle of liquid metal obtained by melting edges of said workpiece(s) to be assembled and constituting, after cooling and solidifying, a welded joint, when said current lines pass through said puddle of liquid metal, said two earth contactors being electrically isolated from one another.
A hybrid arc/laser welding unit for welding one or more metal workpieces to be welded or assembled, comprising:
A hybrid arc/laser welding unit for welding one or more metal workpieces to be welded or assembled, comprising:
Dependencies are inferred from the claim text.