A laser welding apparatus is equipped with a laser head that emits a laser beam and an airflow forming unit that forms sheet-shaped airflows, in which the airflows formed by the airflow forming unit traverse an optical path of the laser beam emitted from the laser head, the airflows traversing the optical path at multiple positions which are spaced from each other in a direction along the optical path in a same direction. The airflow forming unit has an opening between the airflows at the multiple positions, the opening penetrating in a direction in which the airflows traverse the optical path.

Using hydrogen in the shielding gas during laser welding is counter-intuitive to standard formulation design practices which often strive to limit or eliminate hydrogen from the shielding gas for laser welding (or from the welding arc and weld pool for other welding methods). The present disclosure is directed to a laser welding technique that utilizes hydrogen in the shielding gas to limit the production of slag, oxides, or silicates during welding or additive manufacturing.

Disclosed is a laser beam processing device, the main part of which is a coupling device (1) for coupling a focused laser beam (2) into a fluid jet (3) of a defined cross-section. The coupling device (1) comprises a housing (4), in which a fluid nozzle is configured for forming the fluid jet (3). In addition, an outlet opening (6) is provided in the housing, through which the fluid jet (3) exits from the housing (4) and the cross-section of which is larger than the cross-section of the fluid jet (3). A passage chamber is provided between the fluid nozzle (5) and the outlet opening (6) for the fluid jet (3). According to the invention, a throttle bore is provided, which connects the passage chamber (7) to the pressure chamber and is dimensioned in relation to the outlet opening so that, in the region of the passage chamber which is arranged about the fluid nozzle (5), there is a pressure that is smaller than the pressure in the pressure chamber so that an overpressure does not form in the passage chamber with respect to the pressure in the pressure chamber. In addition, a method is disclosed for setting a pressure in the passage chamber (7) in a coupling device of this type, in which the pressure does not exceed the pressure in the pressure chamber.

There is provided high power laser systems, high power laser tools, and methods of using these tools and systems for cutting, sectioning and removing structures objects, and materials, and in particular, for doing so in difficult to access locations and environments, such as offshore, underwater, or in hazardous environments, such as nuclear and chemical facilities. Thus, there is also provided high power laser systems, high power laser tools, and methods of using these systems and tools for removing structures, objects, and materials located offshore, under bodies of water and under the seafloor.

A method and system is provided for laser piercing of thick plate material that allows for rapid transition to a cutting operation that can reliably produce a piercing hole and complete a cutting operation of the intended shape in a short time, while improving the cutting quality of the cutting after switching from the piercing operation. The cutting nozzle has a centrally located laser. The piercing operation applies a laser beam to the cut work while axially supplied pure oxygen gas is applied towards the cutting work. Additionally, a direction controlled nozzle adjacent the main cutting port provides a discharge of high pressure compressed air non-axially relative to the cutting operation to clear excess molten metal and debris from the kerf thereby increasing the efficiency of the piercing and shortening the cycle time.

The present disclosure teaches systems and methods for robotic welding of studs onto the surface of I-beams. These systems and methods will find industrial applicability in, for example, the steel erection industry.

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.

An object is to provide a technology in which in debarring machining on a three-dimensionally shaped ridge line by laser application, a stable gas flow can be supplied and in which stable deburring machining can be performed. A deburring device for removing a burr which is present on a ridge line of a workpiece after being machined, includes: a laser device which includes a laser machining head that applies laser light to the ridge line; a transport device which transports the laser device and a gas jetting, device; and a controller which controls the laser device, the gas jetting device and the transport device and the controller controls the gas jetting device and the transport device such that a gas jetting nozzle is moved on a plane including the bisector of an apex angle of the ridge line and the ridge line and that in a side view parallel to the ridge line, an angle formed by the ridge line and the central axis line of the gas jetting, nozzle is an acute angle.

A curing device delivers localized curing energy along a pattern of curable material printed over a substrate. A curing head of the device can emit a column of curing energy along an emission axis and toward a substrate carrying the pattern of curable material, and a movement system provides relative movement between the curing head and the substrate so that the column of curing energy is guided along the pattern. Localized delivery of the curing energy enables printing and curing of printed materials on low temperature substrates such as thermoplastics.

A double nozzle for a laser processing head includes an inner body portion having an interior surface defining a bore for passing a laser beam, a first interface surface near a distal end of the inner body portion, the first interface surface including a plurality of channels, and an exterior surface near a proximal end of the inner body portion and shaped to engage the laser processing head. Each channel includes interior and exterior linear edges in a cross-section that passes though a central longitudinal axis of the double nozzle. The double nozzle also includes an outer body portion connected to the inner body portion. The outer body portion defines a jet surface, which together with the plurality of channels defines a corresponding plurality of auxiliary fluid flow paths about the bore and between the inner body portion and the outer body portion.