A method for laser welding is provided. The method includes arranging at least one heat source point from a first collection of heat source points so as to overlap at least a portion of at least one heat source point from a second collection of heat source points, irradiating a portion of a target with the first and second collections of heat source points, the heat source points maintaining a linear profile within their respective collection, and directing the at least two collections of heat source points in a travel direction along a weld line, each linear profile maintaining an oblique angle relative to the travel direction.

A shock absorbing member of the present disclosure is a shock absorbing member including a first hollow member (11) and a second hollow member (12) that are made of aluminum alloy and are weld joined to each other, in which a weld material and weld beads (W) do not project from a side on which a joined surface between the first hollow member (11) and the second hollow member (12) is located.

A laser welding system is provided including a laser source configured to produce at least one laser beam, beam modifying means configured to split the at least one laser beam, directing means, and controlling means configured to control the directing means. The controlling is configured to control the directing means to cause the split laser beam to form at least two heat source points on the target, the heat source points maintaining a linear profile, and move the at least two heat source points in a travel direction along the target, wherein the linear profile forms a predetermined, oblique angle relative to the travel direction.

A method of forming a weld on a work piece is disclosed. The method may include creating an internal cavity along the work piece and extending a conduit having an exit orifice into the internal cavity such that the exit orifice may be positioned adjacent to the weld to be formed. The method may further include supplying a purge gas to the conduit, the purge gas being carried through the conduit and pushed out of the exit orifice so as to displace undesirable gasses away from the weld to be formed and then subsequently forming the weld.

A workpiece having a first plate-shaped part and a second plate-shaped part connected to the first plate-shaped part in a direction to cross the first plate-shaped part is cut with a laser beam. A cutting line across the first plate-shaped part and the second plate-shaped part is set. In the second plate-shaped part, a notch portion that opens to a tip end portion of the second plate-shaped part and is along the cutting line is formed by cutting with the laser beam so that a cutout piece that is cut out by forming the notch portion is divided into a tip end portion and a base portion. The first plate-shaped part is cut along the cutting line by irradiation with the laser beam from one direction.

A method for manufacturing an additively-manufactured object, includes: an additively-manufacturing step of building a layered body by depositing a weld bead obtained by melting and solidifying a filler metal, the layered body having an opening along a forming direction of the weld bead and an internal space surrounded by the weld bead; and a closing step of forming a closing wall portion connecting an edge portion of the opening with the weld bead for closing. In the additively-manufacturing step, the opening is formed with a width dimension larger than a bead width of the weld bead, and in the closing step, the closing wall portion having a width dimension larger than the bead width is formed by the weld bead to close the opening.

The invention makes available a tool for friction stir welding, which makes it possible, with reduced effort, to connect two panel elements that butt up against one another with one another by means of friction stir welding, in the case of which a tunnel is formed in the region of the abutting side surfaces, by means of recesses formed in the manner of a channel in the side surfaces in question. For this purpose, the tool has a central axle configured in the manner of a pin, provided for coupling to a drive device, a first friction shoulder carried by the central axle, a second friction shoulder carried by the central axle at a distance from the first friction shoulder in the longitudinal direction of the central axle, two support shoulders carried by the central axle, arranged between the friction shoulders, one of which is mounted on the central axle in an axially displaceable manner, and an elastic element that is arranged between the support shoulders, and exerts an elastic force the axially displaceable support shoulder, which force is directed to the friction shoulder most closely adjacent, in each instance, to the axially displaceable support shoulder in the direction. According to the invention, the setting device includes a setting element that is driven outward, away from the central axle of the tool, in the radial direction, during use, by means of the centrifugal forces that are then in effect, and, during this process, acts against a slanted surface formed on the support shoulder, in each instance.

The invention relates to tooling for holding parts in position to enable them to be friction welded together in order to construct a hollow structure, the tooling comprises: a framework made up of two frames for receiving the parts for welding together in their positions for forming the hollow structure, the parts comprising preformed parts and an intermediate section; shape-holder members for holding the hollow structure, associating backing thrust members and lateral grip members for gripping the outsides of the preformed parts; anvils suitable for being placed inside the set of preformed parts beside the section; and clamping means operable to take up a clamping position in which they cause opposing thrust to be applied against the anvil and the inside face of a preformed part, its part itself bears against the shape-holder members.

Irradiation with a laser beam is performed along a welding bead, while the laser beam is aimed, as an irradiation point of the laser beam, at a contact point between a deck plate and a U-rib that is contained in a non-welded portion of a root part, from a side of the welding bead of the root part. Thereby, it is possible to remove a crack beginning at the non-welded portion of the root part generated at a joining portion between the deck plate and the U-rib of a steel floor slab, by the irradiation with the laser beam.

Provided is a method for manufacturing a liquid cooling jacket including a jacket body and a sealing body joined to the jacket body. The method includes steps of: preparing; placing; first primary joining with a rotary tool; and second primary joining with the rotary tool. A rotary tool includes a base end pin and a distal end pin. The distal end pin includes a flat surface and a protrusion extending from the flat surface. In the first primary joining and the second primary joining, friction stirring is performed in a state where a front surface of the sealing body is brought in contact with an outer peripheral surface of the base end pin, the sealing body is brought in contact with the flat surface of the distal end pin, and the jacket body is brought in contact with the protrusion.