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.

To provide a nozzle for laser processing head capable of reliably drilling a small hole when drilling of the workpiece is performed by using a laser machine. A nozzle includes: a nozzle tip body that irradiates a workpiece with a laser beam; a charge port formed in the nozzle tip body; an exhaust port formed in the nozzle tip body so as to oppose to the charge port; and an elastic member that is provided in a tip end of the nozzle tip body and contacts with the workpiece while elastically extending and contracting in the axial center direction of the nozzle tip body. The nozzle supplies gas to the inside of the nozzle tip body along a gas flow path extending from the charge port to the exhaust port in a form of crossing across the laser beam in the nozzle tip body, to generate a negative pressure in the vicinity of an opening part of a tip end of the nozzle tip body. The elastic member contacts with the workpiece and improves the degree of enclosure of the nozzle tip body by the workpiece. Thereby, higher negative pressure than the negative pressure is generated.

A laser brazing system including a torch body, a wire feed tip, a laser processing head, and a cooling collar. The torch body includes nozzle, mounting, and cooling sections. The nozzle section has a nozzle wall and a feed wire conduit. The cooling section has a cooling barrel, a coolant supply connection, and a coolant return connection. The wire feed tip has a feed wire outlet and is connected to one end of the torch body. The laser processing head directs laser light toward the feed wire outlet. The cooling collar is disposed on the nozzle section and includes a collar body and a coolant conduit. The collar body has a through-bore that receives the nozzle wall. The coolant conduit has an end portion attached to the collar body and a leg portion that transports coolant to and from the end portion.

A workpiece positioning system for holding and manipulating a workpiece. The system includes a rail, a headstock assembly, and a tailstock assembly. The tailstock assembly is mountable to the rail in spaced relation to the headstock assembly to enable the workpiece to be supported between the headstock assembly and the tailstock assembly. The tailstock assembly includes a locking mechanism operable between a locking position in which the tailstock assembly is lockable against the rail in a desired position relative to the headstock, and an unlocked position in which the tailstock assembly is adapted to traverse the rail. The invention also provides a powder injection nozzle having a body and aa tube releasably connected to the body. The tube defines a through passage having at least one inlet for receiving a cladding material and an outlet for delivering the cladding material from the tube.

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 welding head is configured to fasten under a focusing lens for focusing the laser and including at least one annular nozzle for injecting a protective gas, and a protective chamber for protecting the focusing lens with a transverse flow of air. The annular nozzle is arranged around an unobstructed optical axis passing through the laser welding head. The chamber for protecting the focusing lens with a transverse flow of air includes air admission and air exhaust in register with the air admission in a plane substantially perpendicular to said optical axis. The laser welding head is configured to be fastened against the focusing lens without any lateral opening between the focusing lens and the protective chamber. The head presents a distance of at least 100 mm between an outlet of the annular nozzle and the protective chamber.

An improved laser-machining head unit for fabric comprising a diagonal mirror assembly with a tubular sleeve extending downward to an internally threaded distal tip. An annular adapter is provided with an externally-threaded male fitting at one end and an internally-threaded receptacle at an opposing end. The externally-threaded male fitting of the adapter is adjustably screw-threaded into the internally threaded distal tip of the tubular sleeve. A laser nozzle has a frusto-conical tip and an annular collar for attachment to the adapter, the collar being externally threaded and fixedly screw-inserted into the internally-threaded receptacle of the adapter. In addition, there is a gas inlet affixed to the collar of the laser nozzle for introducing gas at a 90-degree angle thereto. The screw-adjustable configuration ensures proper alignment at all times of the lens, the beam and the nozzle aperture, and air stream.

The mobility of an optical processing apparatus is improved. There is provided an optical processing apparatus for scanning a processing region having an at least one-dimensional spread by moving a nozzle head while irradiating the processing region with an optical processing light beam via the nozzle head, including a light source that emits, to air, the optical processing light beam toward the nozzle head, a nozzle head that includes a hollow nozzle in a vertical direction and a light beam direction changing optical system which receives the light beam emitted from the light source and propagated in the air, and changes a propagation direction of the received light beam to a direction of a currently processed processing point in the processing region, and a main scanning direction moving mechanism that moves the nozzle head by causing the nozzle head to scan in a main scanning direction of the processing region.

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.

The invention relates to a process for applying a coating material to a surface, comprising the steps of:providing a stream of gas mixture (8) comprising a carrier gas and a coating material (2),feeding the stream of gas mixture (8) onto the surface (3a), wherein the stream of gas 12 s mixture (8) impinges on the surface (3a) and the coating material (2) applied there forms an area of impingement (11) on the surface (3a)coupling at least one laser beam (7) into the stream of gas mixture (8),wherein the coupled-in energy of the at least one laser beam (7) is determined in such a way that the solid coating material (2) at least partially melts andwherein each laser beam (7) is directed onto the stream of gas mixture (8) in such a way that the laser beam (7) does not fall on the area of impingement (11) on the surface. The invention also relates to a device for carrying out the process.