Tool head used for laser processing workpieces, comprises focussing lens and nozzle coaxially surrounded by pipe having inner diameter which is larger than outer diameter of nozzle

摘要

Tool head comprises: (a) a focussing lens (1) which directs a laser beam bundle from a laser onto a workpiece surface (8); and (b) a nozzle (3) coaxially surrounding the optical axis (6) and having an opening (2) from which a fine beam and a suction device exits. The nozzle is coaxially surrounded by a pipe (5) having an inner diameter which is larger than the outer diameter of the nozzle. One end of the pipe is connected in a gas-tight manner to the outer nozzle casing surface (7). One end of the pipe is delimited by the outer nozzle casing surface on an annular outlet opening (10) which is arranged in the radiation direction of the laser beam bundle behind the outlet opening.