According to an embodiment, a nozzle of an additive manufacturing device includes a first inner surface that defines a first path through which an energy ray passes; and a second inner surface that defines a second path that extends along the first path and through which gas and a powder material pass. The first path opens to a leading end of the nozzle. The second path opens to near or around the first path. At least part of the second inner surface includes a first region having a larger friction coefficient for the powder material than the friction coefficient of at least one of the first inner surface and an outer peripheral surface of the leading end.

A laser cutting head includes a body, a laser light source located at a first end of the body, a nozzle located at another end of the body, an optical system located inside the body between the laser light source and the nozzle. The body includes at least two parts, which are slidable relative to each other in such a way that, due to their reciprocal displacement, the mutual position of the laser light source and/or the nozzle and/or the optical system can be changed, so that the geometry of the laser beam inside the body can be changed during use to achieve the desired parameters of the focus of the laser beam on the surface of the workpiece.

This disclosure provides a shield for use in a liquid guided laser system and related method of use. The shield comprises a rigid body with a target facing surface. The rigid body defines a through hole with a diameter that accommodates a liquid guided laser path. The rigid body has a thickness that defines a length of the liquid guided laser path through the rigid body. The thickness of the rigid body is at least twice the diameter of the through hole. The rigid body is positioned in the liquid guided laser path of the liquid guided laser system between a discharge nozzle of the liquid guided laser system and a target.

A coaxial nozzle of a laser beam machine has an inner nozzle in which a laser beam and an inner gas are passing through an inner side, an outer nozzle provided at an outer side of the inner nozzle, and a cooling circuit for cooling the inner nozzle.

A laser processing machine and a nozzle thereof are provided. The nozzle includes a nozzle body and a protector. The nozzle body defines a laser passage therein. The protector is coupled to an end portion of the nozzle body. The protector has a through hole communicating with the laser passage. The protector is made of a conductive material not containing a metallic element.

A laser machining head has at least one channel in a welding nozzle, through which welding filler material is deposited. At least one of the following features i) to iv) is implemented: i) a wire-shaped welding filler material is supplied through the channel into the laser beam via a drive motor. An electric current in the drive motor is measured, and the feed movement of the filler material is influenced by the measured current; ii) a strain gauge is attached to a housing or the welding nozzle, where by the strain gauge a termination of the machining process is initiated when a measurement signal value is reached; iii) a termination of the machining process is initiated by a contact arrangement on the housing; and/or iv) an electronic camera is used to monitor the supply of welding filler material, and the feed movement of at least one filler material is influenced.

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 laser cutting tool with protective enclosure assembly for manipulating a workpiece on a movable platen includes a frame, a top protection assembly, a middle protection shield, a bottom protection assembly and a laser torch head. The top protection assembly, middle protection assembly, and bottom protection assembly are removably mounted to the frame such that they form a cavity enclosing only substantially the laser torch head.

A laser cladding system comprises a cladding head and a gas system. The cladding head extends along a primary axis, and comprises a mirror and a powder nozzle both situated at a distal end of the head. The powder nozzle directs weld material at a target point, and the mirror directs a beam of collimated light at the target point. The gas system comprises a high-speed gas nozzle and a gas knife. The high-speed gas nozzle produces a gas sheath coaxial with the beam in a region between the mirror and target point, shielding the mirror from debris and backspatter. The gas knife redirects the gas sheath away from the target point and redirects debris and molten backspatter away from an interior of the laser cladding head.

A laser cladding head comprises a protective housing, a focal array, a turning mirror, and a powder nozzle. The housing extends along a primary axis from a proximal end to a distal end. The focal array is situated at the proximal end and oriented to receive and focus collimated light in a beam directed substantially along the primary axis. The turning mirror is situated at the distal end and disposed to redirect the beam in an emission direction, towards a target point separated from the turning mirror by a working distance of at most a tenth the focal length. The turning mirror is a nonfocal reflective surface indexable to alter an impingement location of the beam on the turning mirror. The powder nozzle is situated at the distal end and receives and directs weld material towards the target point for melting.