Provided are a jet device and systems and methods using the jet device for manufacturing objects by additive manufacturing, especially titanium and titanium alloy objects, wherein the jet device directs a cooling gas across a liquid molten pool, or to impinge on the liquid molten pool, or to impinge upon a solidified material adjacent to a liquid-solid boundary of the liquid molten pool, or to impinge on an as-solidified material, or any combination thereof, during the additive manufacturing process. The application of the cooling gas can result in an additively manufactured metal product having refined grain structure with a high proportion of the grains being approximately equiaxed, and can yield an additively manufactured product exhibiting improvements in strength, fatigue resistance, and durability.

A laser welding device includes: a laser scanner body configured to emit a laser beam to a workpiece; a jet nozzle configured to jet gas so as to cause the gas to cross an optical path of the laser beam emitted from the laser scanner body; and a guide plate disposed on the downstream side in the flow direction of the gas, from the optical path of the laser beam emitted from the laser scanner body. The guide plate is configured to change the flow direction of the gas that has crossed the optical path of the laser beam into a direction away from a laser irradiation position on the workpiece toward the downstream side in the flow direction of the gas.

The purpose of the present invention is to provide a method for measuring the inclination of a waterjet relative to a machine coordinate system of a laser machining device. The present invention provides a method for measuring the inclination of a waterjet of a laser machining device in which a laser beam that has been introduced and guided into a waterjet jetted from an optical head is moved relative to a workpiece fixed to a table so as to machine the workpiece, wherein measured is the inclination of the waterjet relative to the table which is within a stable-length range in which the laser beam passing through the inside of the waterjet can be reflected so as to advance in the axial direction.

The invention relates to a device (1) for the additive production of three-dimensional objects (2) by successive, layered, selective exposure and accompanying successive, layered, selective solidification of construction material layers of a construction material (3) that can be solidified by means of an energy beam (4), comprising a flow device (11), which is designed to form a first fluid flow (FS1) that flows, particularly in a circuit-like manner, along at least one functional component of the device (1), wherein the first fluid flow (FS1) is laden with contaminants, particularly particulate contaminants, which are process-created, wherein the flow device (11) is designed to form a second fluid flow (FS2), wherein the second fluid flow (FS2) flows between the first fluid flow (FS1) and the at least one functional component of the device (1), directly along the surface of the at least one functional component of the device (1).

A laser tool includes a tool body disposed at least partially along a central longitudinal axis, and a head unit connected to the tool body with a rotational joint. The head unit rotates around the central longitudinal axis with the rotational joint, includes a laser head to direct a laser energy toward a target and along a second longitudinal axis of the head unit. A purging nozzle, fluidly connected to a fluid source, includes a nozzle outlet oriented at an angle relative to the second longitudinal axis of the head unit, and directs fluid at an angle into a pathway of the laser energy from the laser head to bias purged material out of the pathway of the laser energy. The rotational joint supports the head unit on the tool body, and moves the head unit in a radial direction relative to the central longitudinal axis.

A method for material processing is disclosed, the method comprising applying a laser beam, directing the laser beam to a processing location to melt material at the processing location, and providing a shielding gas flow. The shielding gas flow is controlled dependent on at least one of a processing location position, a processing advance vector, and a processing trajectory.

A laser processing head comprises an optical focusing unit for focusing a laser beam on a processing zone of a workpiece and an annular nozzle arranged coaxially with respect to a central axis of the laser beam for introducing an auxiliary gas into a region surrounding the processing zone. The annular nozzle is mounted on the laser processing head so as to be displaceable along the laser beam axis and can be secured to the laser processing head in different positions along the laser beam axis.

A method is provided for operating a laser system. During an embodiment of this method, inert gas is directed against an object within a cavity of a collection device. An aperture is formed in the object by ablating the object with a laser beam that travels within the cavity and to the object. Byproducts of the ablation are removed from the cavity. During another embodiment of the method, inert gas is pooled against an object and a gas curtain is provided proximate a lens. The object is cut using a laser beam which travels from the lens, through the gas curtain and the pooled inert gas, to the object. Fumes and/or particulates produced by the formation are directed away from the laser beam.

A gas assistance device for laser welding includes an assistance gas unit configured to apply an assistance gas to a site to be welded, and a fume suction unit configured to suck fumes generated during laser welding. The assistance gas unit is provided with an assistance gas nozzle. The fume suction unit is provided with a fume suction port. The assistance gas nozzle includes a first slit-shaped opening. The fume suction port includes a second slit-shaped opening. The fume suction unit is at least partially attached to the assistance gas unit. In an operating state of the gas assistance device, the second slit-shaped opening is at least partially located above the first slit-shaped opening.

A laser processing apparatus includes: a laser-beam irradiation device that forms a processing groove in a workpiece by subjecting workpiece to laser processing while scanning a surface of workpiece; a nozzle that injects a gas W in a range of laser-beam irradiation by laser-beam irradiation device; a motor that changes a position of injection of gas W by nozzle; and a controller. Controller controls motor in accordance with a position of irradiation by laser-beam irradiation device, thereby changing the position of injection of gas W by nozzle.