Laser beam machining head

A laser beam machining head including one of a filler wire- and an arc-coaxial laser welding head comprising:

• one of a filler wire and an electrode for generating various arcs, an optical axis of a laser beam being coaxially arranged with the one of the filler wire and the electrode;
• and
• a convex roof mirror and a concave roof mirror combined to divide the laser beam in two, thereby forming two separate laser beams to be condensed so that no laser beam is projected onto the at least one of a filler wire feed pipe and an electrode holding pipe.

A laser beam machining head including a filler wire-coaxial laser welding head, comprising:

• a filler wire;
• a convex roof mirror and a concave roof mirror combined to divide a laser beam in two, thereby forming two separate laser beams to be condensed, with a spacing present between the two separate laser beams, wherein the filler wire is fed to a condensing position via a filler wire guide in the spacing between the two separate laser beams from a filler wire feed pipe disposed outside the laser beams.

A laser beam machining head including an arc-coaxial laser welding head, comprising:

• an electrode for generating various arcs;
• and
• a convex roof mirror and a concave roof mirror combined to divide a laser beam in two, thereby forming two separate laser beams to be condensed, with a spacing present between the two separate laser beams, and a tip of the electrode being held above condensing position while the electrode is supported by one of a water flow pipe and an electrode holding pipe passing through the spacing between the laser beams.