Abstract: A combined welding method with a filler wire using both a YAG laser and an electric arc, and a combined welding device with a filler wire using both a YAG laser and an electric arc. The welding is performed by directing a laser focus of a YAG laser on base materials and for welding in the vicinity of the focus by a filler wire, connecting a power source for applying a voltage to the filler wire between the filler wire and the base materials for welding, irradiating a YAG laser on the base materials for welding in the connecting condition, whereby an arc is induced to the filler wire by a plume (plasma-activated gas and the metal vapor), and holding the plume generated by YAG laser inside and outside of a keyhole.

Abstract: This invention provides a new through weld method to carry out welding of a base metal made of aluminum or that of aluminum alloy using high energy beams wherein a shield gas ambience (an inert gas ambience) to cover a welding site in a submerged-scar is formed, even a shield gas ambience (an inert gas ambience) to cover a welding site irradiated by the high energy beams. Since the former shield gas ambience to cover the submerged-scar pushes the keyhole against the gravity and/or the gas pressure force of the latter shield gas supplied to the laser irradiation side, then the forming of hang down of beads and the resultant projection of the welding base metal are prevented.

Abstract: A laser light L is emitted from a laser light source 6 to workpieces 1, 2, to form a laser molten weld pool 3, and immediately thereafter, an arc molten weld pool 4 is formed using an arc welding machine 7; thereby plates 1, 2 are welded. The arc welding machine 7 is provided with a filler wire to form a bead 5 on the plate 1. With the welding process according to the present invention, workpieces can be efficiently and securely welded regardless of shape and material of the workpieces.

Abstract: The present invention relates to an aluminum alloy for rapidly cooled welding. The alloy comprises, by weight, Mg: 0.4 to 7.0%, Cu: 0.05 to 1%, at least one kind of Mn: 0.8 to 2.5%, Cr: 0.35 to 2.0% and Fe: 0.7 to 1.5% and the balance of Al and inevitable impurities.

Abstract: A combined welding method with a filler wire using both a YAG laser and an electric arc, and a combined welding device with a filler wire using both a YAG laser and an electric arc, a welding in which a welding gap margin is broad, height and shape of reinforcement of weld, and penetration depth are preferable, can be effectively performed by the method or the device. The welding is performed by directing a laser focus 8 of a YAG laser 9 on base materials 31 and 32 for welding or the vicinity of the focus 8 by a filler wire 20, connecting a power source 22 for applying a voltage to the filler wire between the filler wire 20 and the base materials for welding, irradiating a YAG laser on the base materials for welding in the connecting condition, whereby an arc is induced to the filler wire by a plume (plasma-activated gas and the metal vapor), and holding the plume generated by YAG laser inside and outside of a keyhole.

Abstract: A laser welding device for executing stable, highly reliable edge joint welding by laser beam comprises: a laser beam emitting head directed to a layered bonding position on an end surface in an edge of a layered base material; a first set of rollers for being along one plane of the base material; a second set of rollers for being along the other plane opposing the plane; a first member which rotatably supports the rollers and which is coupled with the head; a second member which rotatably supports the rollers and which is coupled with the head; and a pressing means for driving at least one of the first and second members and in a direction in which the gap between the rollers and the rollers is reduced in order to sandwich and press the base material by means of the rollers.

Abstract: In order to implement lamination welding in which there is little distortion and the bonding strength is high by means of laser beam, a laser welding device comprises: a first laser beam emitting head directed to a layered base material composed of two or more layers in a superimposed direction; a first skirting roller rotatably supported by means of a first supporting member on which the first laser beam emitting head is fixed and provided with a peripheral surface which protrudes more at a base material side than a base material opposing end of the first laser beam emitting head; a second laser beam emitting head directed to the layered base material from the opposite side of the first laser beam emitting head in the superimposed direction; a second skirting roller rotatably supported by means of a second supporting member 14 on which the second laser beam emitting head is fixed and provided with a peripheral surface which protrudes more at a base material side than a base material opposing end of the secon

Abstract: A laser welding device for executing stable, highly reliable edge joint welding by laser beam comprises: a laser beam emitting head directed to a layered bonding position on an end surface in an edge of a layered base material; a first set of rollers for being along one plane of the base material; a second set of rollers for being along the other plane opposing the plane; a first member which rotatably supports the rollers and which is coupled with the head; a second member which rotatably supports the rollers and which is coupled with the head; and a pressing means for driving at least one of the first and second members and in a direction in which the gap between the rollers and the rollers is reduced in order to sandwich and press the base material by means of the rollers.

Abstract: In order to implement lamination welding in which there is little distortion and the bonding strength is high by means of laser beam, a laser welding device comprises: a first laser beam emitting head directed to a layered base material composed of two or more layers in a superimposed direction; a first skirting roller rotatably supported by means of a first supporting member on which the first laser beam emitting head is fixed and provided with a peripheral surface which protrudes more at a base material side than a base material opposing end of the first laser beam emitting head; a second laser beam emitting head directed to the layered base material from the opposite side of the first laser beam emitting head in the superimposed direction; a second skirting roller rotatably supported by means of a second supporting member 14 on which the second laser beam emitting head is fixed and provided with a peripheral surface which protrudes more at a base material side than a base material opposing end of the secon

Abstract: The present invention relates to an aluminum alloy for rapidly cooled welding. The alloy comprises, by weight, Mg: 0.4 to 7.0%, Cu: 0.05 to 1%, at least one kind of Mn: 0.8 to 2.5%, Cr: 0.35 to 2.0% and Fe: 0.7 to 1.5% and the balance of Al and inevitable impurities.

Abstract: This invention provides a new through weld method to carry out welding of a base metal made of aluminum or that of aluminum alloy using high energy beams wherein a shield gas ambience (an inert gas ambience) to cover a welding site in a submerged-scar is formed, even a shield gas ambience (an inert gas ambience) to cover a welding site irradiated by the high energy beams. Since the former shield gas ambience to cover the submerged-scar pushes the keyhole against the gravity and/or the gas pressure force of the latter shield gas supplied to the laser irradiation side, then the forming of hang down of beads and the resultant projection of the welding base metal are prevented.

Abstract: A laser light L is emitted from a laser light source 6 to works 1, 2, to form a laser molten weld pool 3, and immediately thereafter, an arc molten weld pool 4 is formed using an arc welding machine 7; thereby plates 1, 2 are welded. The arc welding machine 7 is provided with a filler wire to form a bead 5 on the plate 1. With the welding process according to the present invention, works can be efficiently and securely welded regardless of shape and material of the works.