A laser operating machine for additive manufacture of objects, via a process of laser thermal treatment of metal powders, in particular via fusion, comprising a movement structure (11), which is mobile in a working space (100) that comprises a working surface (110), said machine operating according to a first cartesian system of axes of movement (X, Y, Z) and being configured for supporting a moving element (12) comprising one or more nozzles (34) for emitting jets of powder to be treated thermally onto a working substrate (100, 110), and an optical laser assembly (20) for conveying a laser beam (L) to form a laser spot (S) focused on said working substrate (100, 110) in order to carry out thermal treatment of said powders. According to the invention, said moving element (12) comprises: an upper portion (12a) associated in a fixed way to said movement structure (11), said optical laser assembly (20) being set in said upper portion (12a); and a lower portion (12b), set in which is a tool-carrier frame (30), arranged on which are said one or more nozzles (34) for emitting jets of powder, and in that said nozzles (34) are arranged on said frame (30) so that longitudinal axes (U) thereof form an angle of inclination () with respect to said vertical axis (I) such that jets (PJ) of said nozzles (34) intersect in a powder-deposition point (PD), said machine (10) comprising actuator means for varying said angle of inclination () of said longitudinal axes (U) of said one or more nozzles (34); said optical laser assembly (20) being set in the moving element (12) so as to send the laser beam (L) onto the working surface (110) passing within perimeter defined by said plurality of nozzles (34) emitting jets of powder.

The laser welding device includes a laser transmission window and a gas injection nozzle. The gas injection nozzle includes an optical path hole and an injection unit that injects an inert gas for shielding metal vapor into the optical path hole toward an irradiation direction side and an optical axis side of a laser beam.

The present invention discloses build-up welding methods for repair by low power density laser direct energy deposition upon a substrate to be welded, which do not necessarily require preheating of the substrate. The present invention further discloses welded regions formed by such methods, and products comprising such welded regions. Moreover, the present invention relates to laser additive welding methods and processes using a filler wire for various welding positions and orientations.

An apparatus for fabricating a part, comprising a curved shaft; a build plate connected to the curved shaft; a motor; and a transmission connecting the motor and the curved shaft. The build plate moves along a curved path having a radius of curvature originating on an axis when the transmission transfers power from the motor to the curved shaft. Material deposited on the build plate along the curved path forms the part comprising a solid of revolution around the axis. In one or more examples, the part is an aircraft engine inlet.

An additive manufacturing apparatus includes: an irradiation unit that irradiates a feeding position with a laser beam that melts a build material; a numerical control device that is a control unit that performs control for building a deposit by stacking beads on a substrate; and an arithmetic device that is an arithmetic unit that executes an arithmetic process of computing parameters for the control unit to perform the control unit. The beads, which are two beads stacked on each other, are a first bead and a second bead stacked on the first bead. The first bead is formed earlier than the second bead. The feeding position is a first position in formation of the first bead. The feeding position is a second position in formation of the second bead. On a basis of a width of the first bead and a diameter of the laser beam, the arithmetic unit calculates an interval between the first position and the second position in a set direction that is a direction of the width of the first bead. The control unit performs control for setting the second position to a position shifted from the first position in the set direction by the interval, so as to allow a part of the second bead to protrude from the first bead in the set direction.

Methods of forming or repairing a tip rail of a turbine are disclosed. One method may include repairing the tip rail, or adding material to form the tip rail, by laser irradiating a wire material with a laser in an inert gas in a vicinity of a tip plate. The laser irradiating the wire material includes modulated pulsing the laser through: a warm up phase during which an on-power of the laser is increased over time to a maximum target on-power, a melt and bond phase during which the wire material is melted and during which the on-power is less than the maximum target on-power, and a stress releasing phase during which the on-power of the laser is less than the on-power during the melt and bond phase. Exterior surface coatings and/or TBC may be sprayed onto the tip rail to protect it.

A wire dispenser for a laser metal wire deposition machine comprises a longitudinal duct for guiding a wire from a proximal end to a distal end of the duct. A nozzle unit is connected to the distal end of the duct and has a through bore for receiving the wire from the distal end of the duct and for discharging the wire adjacent to a laser metal wire deposition site. The nozzle unit includes a cooling circuit for a cooling liquid.

Described is a weakening device for weakening packaging materials having at least one laser unit comprising a laser having a laser beam and at least one transport device for transport of the packaging material relative to the laser unit. The laser unit has at least one focusing optics for focusing the laser beam on the packaging material transported relative to the laser. In order to be able to inscribe both straight lines of weakness and shapes included from lines, it is provided that the laser unit has at least one scanner for adjusting the laser beam at least in one direction transversely to the transport direction for inscribing predetermined shapes into the packaging material transported past the laser, and that a beam switch is provided in the path of the laser beam for transmitting the beam to the focusing optics in a liner position or to the scanner.

A laser operating machine for additive manufacture of objects, via a process of laser thermal treatment of metal powders, in particular via fusion, comprising a movement structure, which is mobile in a working space that comprises a working surface, said machine operating according to a first cartesian system of axes of movement and being configured for supporting a moving element comprising one or more nozzles for emitting jets of powder to be treated thermally onto a working substrate, and an optical laser assembly for conveying a laser beam to form a laser spot focused on said working substrate in order to carry out thermal treatment of said powders. According to the invention, said moving element comprises:

an upper portion fixedly associated to said movement structure, said optical laser assembly being set in said upper portion; and

a lower portion, rotatable about an axis parallel to a vertical axis of said first system of cartesian axes, set in which is a tool-carrier frame, arranged on which are said one or more nozzles for emitting jets of powder,

said optical laser assembly being set in the moving element so as to send the laser beam onto the working surface, passing within a perimeter defined by said plurality of nozzles for emitting jets of powder.

A method of production of a welded structure by butt welding two steel sheets (51, 52) by laser welding (11) while supplying assist gas (12) to a back surface of a melt pool (13), whereby it is possible to prevent formation of a through hole in the melt part (53), characterized in that a thickness of at least one steel sheet (52) of the two steel sheets (51, 52) is 0.6 mm or less, the assist gas (12) is a mixed gas (12) containing 10 to 50 vol % of O.sub.2 gas, and, when an O.sub.2 concentration in the mixed gas (12) is C (vol %), a flow rate L of mixed gas (12) (liter/min) satisfies 30 (liter/min)C(vol %)1 (liter/min/vol %)L (liter/min)<40 (liter/min).