Laser beam machine

Abstract

A laser beam machine capable of preventing contaminants from entering a machining head. A laser beam (2) is reflected by a mirror (4) in a light guide passage (12) and introduced into the machining head (5). The laser beam is then focused by a parabolic mirror (6) to be irradiated onto a spot (7a) on a surface of a workpiece (7). An auxiliary gas (10) is ejected from a gas supply section (9) and throttled by a nozzle (11) to be supplied to the workpiece (7). The surface of the workpiece (7) is melted due to interaction between the laser beam (2) and the auxiliary gas (10), whereby a laser beam machining is achieved. An impeller (20) is arranged between the parabolic mirror (6) of the machining head (5) and the workpiece (7). A motor (21) for driving the impeller (20) is secured to a side wall (51) of the machining head (5) and rotates the impeller (20) at a high speed.

Dependencies are inferred from the claim text.