Abstract: A weldment manufacturing method includes a recess forming step of forming recesses on a first target member and a second target member, the recesses delineating holes each of which spans across the first target member and the second target member and that are arranged along a boundary between the first target member and the second target member when the first and second target members that are the objects to be welded together are brought into abutment against each other; an abutting step of bringing the first and second target members into abutment against each other by aligning the recesses so that the recesses delineate the respective holes; and a welding step of placing filler material in the respective holes irradiating and scanning the filler material with the laser to cause the filler material to melt so as to fill the holes with the molten filler material.

Abstract: A gas supply device for a manufacturing device includes an inert gas supply source that supplies inert gas, a supply line connected to the inert gas supply source, a nitrogen removal portion that is provided on the supply line and that removes at least a portion of nitrogen in the inert gas, and an oxygen removal portion that is provided on the supply line and that removes at least a portion of oxygen in the inert gas.

Abstract: An additive manufacturing method includes: forming a powder bed by supplying a raw material powder; and irradiating the raw material powder that forms the powder bed with a light beam having an intensity distribution of a second or higher order mode or of a top hat shape.

Abstract: A weldment manufacturing method includes drilling that forms a hole on a workpiece, feeding a filler material to the hole and putting the filler material on a bottom of the hole, and melting the filler material by emitting a laser beam to the hole while scanning with the laser beam, so as to fill the hole with the melted filler material. By repeating the feeding and the melting, a weld repairing portion filling the hole is formed.

Abstract: This laser processing device is provided with a laser radiating unit which forms a processed groove extending in a scanning direction on a workpiece, by subjecting the workpiece to laser processing while scanning the surface of the workpiece, and a nozzle portion which has a plurality of ejection holes arranged side by side in the scanning direction, and which ejects a gas toward the processed groove from each of the ejection holes. With this laser processing device, since a plume is eliminated by ejecting gas into the processed groove by means of the nozzle portion, the formation of a heat affected layer by the plume can be suppressed to an even greater extent.

Abstract: A laser machining device includes: a laser irradiation unit that forms a machining groove that has one end opening to an end section of a workpiece and the other end thereof closed, as a result of scanning a workpiece surface from an end section of the workpiece and laser machining the workpiece; and a nozzle unit that sprays a gas across an irradiation zone of the workpiece surface created by the laser irradiation unit. The nozzle unit is configured so as to increase the flowrate of the gas supplied to the irradiation zone, from one end to the other end of the machining groove.

Abstract: Provided is a method for bonding dissimilar metals to each other, the method comprising: dissimilar metal layer-forming steps (P2), (P3), (P4) for supplying, to form dissimilar metal layers; a second metal layer-forming step (P5) for supplying, on the surface of the dissimilar metal layers, a filler material formed of a second metal, and heating the filler material formed of the second metal to a temperature equal to or higher than a melting point of the second metal, to form a second metal layer formed of the second metal; and a second material-to-be-bonded welding step (P6) for welding a second material to be bonded that is formed of the second metal, onto the second metal layer.

Abstract: The present invention accurately detects the state of a radiated light beam. According to the present invention, a calibration unit for a metal 3D printer that radiates a light beam at a powder to mold a built part has: a base part that is attached to a stage that is irradiated with the light beam from the metal 3D printer; and a plurality of attachment parts that are provided to the base part at different locations and have detection devices that detect the light beam attached thereto. The attachment parts are provided at different angles such that the detection directions of the detection devices attached thereto are different.

Abstract: An additive manufacturing method according to at least one embodiment of the disclosure includes the steps of, forming a powder bed by supplying a raw material powder, and irradiating the raw material powder that forms the powder bed with a light beam having intensity distribution of a high-order mode that is the second order and higher order mode or of a top hat shape.

Abstract: A method of monitoring an additive manufacturing process according to at least one embodiment of the present disclosure includes the steps of acquiring information on a temperature of a region upstream of a melt pool in a scanning direction of an energy beam, the melt pool being formed by irradiating a raw material with the energy beam, acquiring a parameter indicating a cooling rate of the region based on the information on the temperature, and determining a formation status based on the parameter.

Abstract: A laser processing device includes a laser irradiation unit that performs processing on a workpiece by using a laser while scanning a workpiece surface to form a kerf, jet nozzles that respectively form jet flows flowing toward a bottom surface of the kerf on front and rear sides in a scanning direction of the laser, and an intake part that sucks, above injection ports of the jet nozzles, a gas in a region surrounded by the jet flows from the front and rear sides. In a state in which a certain region of the kerf is isolated by the jet flows, the gas is sucked from this region by the intake part. As a result, a suction force by the intake part can reach the bottom surface of the kerf.

Abstract: A laser device includes a condensing assembly for condensing laser light output from a laser oscillator and a cover for accommodating the condensing assembly, the cover including protection windows permeable to the laser light on an optical path of the laser light. The protection windows include at least one first protection window having a positive refractive index temperature coefficient and at least one second protection window having a negative refractive index temperature coefficient, the at least one first protection window and the at least one second protection window being arranged along the optical path of the laser light.

Abstract: A gas supply device for a manufacturing device includes an inert gas supply source that supplies inert gas, a supply line connected to the inert gas supply source, a nitrogen removal portion that is provided on the supply line and that removes at least a portion of nitrogen in the inert gas, and an oxygen removal portion that is provided on the supply line and that removes at least a portion of oxygen in the inert gas.

Abstract: An additive manufacturing method according to at least one embodiment includes a step of forming a first layer by melting and solidifying powder of a first metal, and a step of forming a second layer on the first layer by melting and solidifying powder of a second metal of a different type from the first metal. The first metal and the second metal are, if the first metal is added to the second metal, a combination capable of forming a solid solution, or if the first metal is added to the second metal, a combination raising a melting point as an additive amount of the first metal increases.

Abstract: A three-dimensional manufacturing apparatus according to at least one embodiment of the present disclosure includes: a manufacturing nozzle for melting a metal material with an energy beam while supplying the metal material to form a bead; a cooling medium nozzle for spraying a cooling medium toward a region including the bead in a workpiece so that the region is cooled locally; a temperature detection unit configured to detect at least a temperature of the region; and a control device for controlling at least one of a scanning rate of the cooling medium nozzle or an amount of the cooling medium to be sprayed per unit time based on a detection result from the temperature detection unit.

Abstract: An additive manufacturing method of manufacturing a product by laminating metal includes: laminating the metal so as to form a half-finished product of the product and a support; and spraying dry ice pellets having a particle shape to the support, after the laminating.

Abstract: A laser processing device of the present invention includes a laser radiation unit which is configured to perform laser processing on a workpiece while scanning a work surface from an end portion of the workpiece to form a processing groove of which one end is open at the end portion of the workpiece and the other end is closed; and a nozzle unit which is configured to inject a gas along the surface of the workpiece such that a flow velocity thereof increases from the one end of the processing groove toward the other end.

Abstract: A bonding member according to an embodiment includes: a metal member including a first base portion made of metal and a first engagement portion made of metal and provided integrally with the first base portion; and a resin member including a second base portion made of resin and a second engagement portion made of resin and provided integrally with the second base portion so as to engage with the first engagement portion. The first engagement portion includes a three-dimensional structure formed by a frame to form a plurality of cavities communicating with each other inside the frame, and the second engagement portion includes a resin filled in the plurality of cavities of the three-dimensional structure. A ratio of the frame per unit volume including the cavity and the frame in the first engagement portion gradually increases toward the first base portion while fluctuating.

Abstract: A weldment manufacturing method includes drilling that forms a hole on a workpiece, feeding a filler material to the hole and putting the filler material on a bottom of the hole, and melting the filler material by emitting a laser beam to the hole while scanning with the laser beam, so as to fill the hole with the melted filler material. By repeating the feeding and the melting, a weld repairing portion filling the hole is formed.

Abstract: An additive manufacturing method for performing additive manufacturing of a metallic powder material on a surface of a metallic base material includes a step of supplying the powder material onto the surface of the base material, a step of welding the powder material to the surface in an unmelted state through friction stir of the powder material and the surface, a step of supplying the powder material onto a welded portion formed by welding the powder material to the surface, and a step of welding the powder material to the welded portion in the unmelted state through friction stir of the powder material and the welded portion.