Honda Giken Kogyo Kabushiki Kaisha

Masato Takikawa

Takanori Yahaba

Junichi Ibukuro

Yasutomo Ichiyama

Toshiyasu Ukena

Kenji Okuyama

Hirobumi Sonoda

Hirofumi Sonoda

Makoto Saga

Junichi Device & Opto Div Of Ibukuro

Hirobumi Device & Opto Div Of Sonoda

Kenji Device & Opto Div Of Okuyama

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.

YAG laser induced arc filler wire composite welding method and weldimg equipment

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.

Through weld for aluminum or aluminum alloy base metals by using high-density energy beams

A combined YAG laser/arc welding apparatus performs a welding operation with a large depth of fusion and a deep fusion at a high efficiency. The welding apparatus includes an arc electrode which targets a point on a welded member where a laser beam from a YAG laser is focused. While an arc power supply is connected between the arc electrode and the welded member, the welded member is irradiated by the YAG laser to produce plasmoid gasses and metal vapors or a plume which is effective to start an arc from the arc electrode. A combined YAG laser/arc welding operation takes place while keeping the plume within and without a keyhole. Welded surface is covered by a hood, and a shielded gas passed through a commutation metal network surrounds the welded focus to prevent an oxidation and keeps the plume maintained. A filler wire is fed to a molten pool.

Method and apparatus for composite YAG laser/arc welding

A laser light L is emitted from a laser light sourceto workpieces, to form a laser molten weld pool, and immediately thereafter, an arc molten weld poolis formed using an arc welding machine; thereby platesare welded. The arc welding machineis provided with a filler wire to form a beadon the plate. With the welding process according to the present invention, workpieces can be efficiently and securely welded regardless of shape and material of the workpieces.

Workpiece welding process

A combined YAG laser/arc welding apparatus performs a welding operation with a large depth of fusion and a deep fusion at a high efficiency. The welding apparatus includes an arc electrode which targets a point on a member being welded where a laser beam from a YAG laser is focused. While an arc power supply is connected between the arc electrode and the member being welded, the member being welded is irradiated by the YAG laser to produce plasmoid gasses and metal vapors or a plume which is effective to start an arc from the arc electrode. A combined YAG laser/arc welding operation takes place while keeping the plume within and without a keyhole. Welded surface is covered by a hood, and a shielded gas passed through a commutation metal network surrounds the welded focus to prevent an oxidation and keeps the plume maintained. A filler wire is fed to a molten pool.

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.

Aluminum alloy for rapidly cooled welding and welding method therefor

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.

Laser welding equipment

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 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 second laser beam emitting head; and a first pressing means for pressing the first supporting member with respect to a supporting base holder in the superimposed direction.

Laser welding equipment and laser welding process

A twin spots pulse laser welding apparatus is disclosed which is used for providing a defect-free weld in a butt welding gap. The welding apparatus comprises a YAG laser oscillator a chopper circuit for controlling the value of the lamp current of the oscillator, a chopping controller a control panel and a pulse generator for applying a lamp current base value Wb and a peak value Wp and a pulsating pulse to the controller, and a twin spots laser head for converging a laser beam delivered from the YAG laser oscillator to two foci R, L which are distributed in x direction with a very small spacing therebetween. YAG laser beam delivered from the YAG laser oscillator is guided through an optical fiber cable to the laser head.

Growing community of inventors

Wako, Japan

Masato Takikawa