A laser machining head has a function of rectifying an assist gas and includes a protection window, a nozzle configured to blow the assist gas over a workpiece, a chamber defining a space between the protection window and the nozzle, an inflow port disposed in a chamber and configured to allow the assist gas to flow in, and a flow dividing projection disposed at a position opposing to the inflow port and configured to divide the assist gas from the inflow port into a first flow and a second flow flowing along a circumferential direction around an optical axis of a laser beam.

A processing head of a laser cladding apparatus, configured to form a cladding layer on a substrate, includes: a laser irradiation part that introduces incident laser light and irradiates the substrate with the laser light; a jet nozzle, into which an assist gas is introduced and which forms a jet of the assist gas around the laser light; and a powder storage part that stores a cladding material powder to be fed to the substrate. The powder storage part has a powder feeding port that is opened facing a jet formation region of the assist gas.

A method for producing three-dimensional work pieces comprises the steps of supplying gas to a process chamber accommodating a carrier and a powder application device, applying a layer of raw material powder onto the carrier by means of the powder application device, selectively irradiating electromagnetic or particle radiation onto the raw material powder applied onto the carrier by means of an irradiation device, discharging gas containing particulate impurities from the process chamber, and controlling the operation of the irradiation device by means of a control unit such that a radiation beam emitted by at least one radiation source of the irradiation device is guided over the layer of raw material powder applied onto the carrier according to a radiation pattern containing a plurality of scan vectors.

A laser welding device includes a welding head configured to emit a laser beam to a working point, a shield gas supplying nozzle configured to supply shield gas to the working point, and a high-speed air supplying nozzle configured to supply a high-speed air stream between the shield gas supplying nozzle and the welding head, the high-speed air stream having a flow rate that is larger than a flow rate of the shield gas, and being supplied in a horizontal direction directly above the shield gas supplied to the working point, or in a direction orthogonal to an emission direction of the laser beam. The high-speed air supplying nozzle is disposed in a range from 80 mm to 200 mm, both inclusive, above the working point, or in a range equal to or lower than a half of a working distance between an emission surface of the laser beam of the welding head and the working point, and supplies the high-speed air stream in a belt shape.

A device including a chamber and a nozzle detachably connected to the chamber, the nozzle defining an aperture, a target carousel disposed within the chamber, a first laser configured to generate a first beam directed toward the target carousel to perform in-situ ablation to form a laser plume, a gas flow system configured to supply gas into the chamber, such that the gas interacts with the laser plume and causes condensation and formation of nanoparticles, and a second laser configured to generate a second beam directed through the interior of the chamber, through the aperture of the nozzle, and toward a substrate disposed outside the device, the second laser beam configured to sinter and crystalize on the substrate the nanoparticles exiting the nozzle.

Selective laser solidification apparatus is described that includes a powder bed onto which a powder layer can be deposited and a gas flow unit for passing a flow of gas over the powder bed along a predefined gas flow direction. A laser scanning unit is provided for scanning a laser beam over the powder layer to selectively solidify at least part of the powder layer to form a required pattern. The required pattern is formed from a plurality of stripes or stripe segments that are formed by advancing the laser beam along the stripe or stripe segment in a stripe formation direction. The stripe formation direction is arranged so that it always at least partially opposes the predefined gas flow direction. A corresponding method is also described.

Aspects of the present disclosure relate to. In one example, a method of controlling an additive manufacturing machine includes: measuring a first temperature of a part being processed by the additive manufacturing machine; determining that the first measured temperature exceeds a temperature threshold; activating an auxiliary gas flow; cooling the auxiliary gas flow with a cooling system; and directing the cooled auxiliary gas flow towards the part.

Methods and apparatus for laser patterning leverage mask trench debris removal techniques to form etch singulation trenches. In some embodiments, the method includes forming a mask layer on the wafer, forming a pattern in the mask layer using a laser of a laser assembly where the pattern allows singulation of the wafer by deep etching and forms a trench in the mask layer with a laser beam which has a process point at a bottom of the trench, directing gas nozzles that flow a pressurized gas at the process point in the trench as the pattern is formed with a gas flow angle relative to the process point and evacuating debris from the trench using an area of negative pressure where the gas flow from gas nozzles and the area of negative pressure are in fluid contact and are confined within a cylindrical housing.

A laser processing system herein includes a laser oscillator, a laser optical path that guides laser beam from the laser oscillator to a workpiece, a purge gas supply line for supplying a purge gas into the laser optical path, oxygen sensor and an impure gas sensor which detects an impure gas influencing the propagation of the laser beam that are installed in the laser optical path, and an impure gas sensor output value correction unit. The impure gas sensor output value correction unit corrects an output value of the impure gas sensor based on an output value of the oxygen sensor.

A nozzle including a coupling portion, intended to be coupled to at least two hot gas outlets of a welding tool, and a transition portion, connected to the coupling portion. The transition portion has a first width in the connection between the transition portion and the coupling portion, and has a second width in an end opposite to the connection between the transition portion and the coupling portion, the second width being greater than the first width.