The technical problems to be solved are to keep the vicinity of the nozzle opening clean and to restrain the jet liquid column from tilting. The solution to problems lies in a method for cleaning a nozzle of a laser machining apparatus to process a work piece to be processed by a laser beam introduced into a jet liquid column, the method comprising the steps of: forming the jet liquid column by jetting a liquid from the nozzle; and irradiating a spot 30 of the laser beam onto a vicinal section of an inlet opening 22c of the nozzle in such a state that a peak power per unit area of the spot 30 of the laser beam irradiated on a surface provided with the inlet opening 22c of the nozzle does not go beyond a threshold value at which the nozzle is damaged and removing foreign matters attached on the surface.

An adjustment collar for a laser machine tool includes a first actuator between an outer housing and an inner collar, the first actuator operable to move the inner collar with respect to the outer housing in the X-axis and a second actuator between the outer housing and the inner collar, the second actuator operable to move the inner collar with respect to the outer housing in the Y-axis.

The present disclosure relates to a metal machining apparatus having a gas nozzle for generating a gas jet. The apparatus also has a nozzle exit opening on one end on the outside; an electronic camera for acquiring a digital image of the end of the gas nozzle with the nozzle exit opening. The apparatus also includes a pattern recognition module for mapping the digital image to at least one nozzle pattern from the group of nozzle state and/or nozzle type.

The present disclosure relates to a metal machining apparatus having a gas nozzle for generating a gas jet. The apparatus also has a nozzle exit opening on one end on the outside; an electronic camera for acquiring a digital image of the end of the gas nozzle with the nozzle exit opening. The apparatus also includes a pattern recognition module for mapping the digital image to at least one nozzle pattern from the group of nozzle state and/or nozzle type.

The technical problems to be solved are to keep the vicinity of the nozzle opening clean and to restrain the jet liquid column from tilting. The solution to problems lies in a method for cleaning a nozzle of a laser machining apparatus to process a work piece to be processed by a laser beam introduced into a jet liquid column, the method comprising the steps of: forming the jet liquid column by jetting a liquid from the nozzle; and irradiating a spot 30 of the laser beam onto a vicinal section of an inlet opening 22c of the nozzle in such a state that a peak power per unit area of the spot 30 of the laser beam irradiated on a surface provided with the inlet opening 22c of the nozzle does not go beyond a threshold value at which the nozzle is damaged and removing foreign matters attached on the surface.

This invention relates to 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.

An adjustment collar for a laser machine tool includes a first actuator between an outer housing and an inner collar, the first actuator operable to move the inner collar with respect to the outer housing in the X-axis and a second actuator between the outer housing and the inner collar, the second actuator operable to move the inner collar with respect to the outer housing in the Y-axis.

An adjustment collar for a laser machine tool includes a first actuator between an outer housing and an inner collar, the first actuator operable to move the inner collar with respect to the outer housing in the X-axis and a second actuator between the outer housing and the inner collar, the second actuator operable to move the inner collar with respect to the outer housing in the Y-axis.

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.

Disclosed is a nozzle unit for laser processing, which can implement one-touch coupling and separation, thereby enabling easy nozzle replacement and uniform maintenance of a nozzle in a mounted state at an accurate position while preventing damage to a nozzle joint. The nozzle unit for laser processing includes: a nozzle body including a nozzle hole and a coupling protrusion formed at an outer periphery of the nozzle hole; and a nozzle adapter allowing the nozzle body to be inserted into and coupled to a lower portion thereof and including a nozzle coupling portion allowing the coupling protrusion at a first position to be inserted thereinto or separated therefrom and allowing the coupling protrusion at a second position to be seated thereon, the second position being spaced apart from the first position in a circumferential direction of the nozzle hole.