LASER MACHINING HEAD

摘要

A laser machining head includes a collimation lens, a focusing lens, and a nozzle unit. The nozzle unit includes a protective member, an inner nozzle, an outer nozzle, a nozzle holding section, and an orifice. The outer nozzle is disposed outside the inner nozzle and the nozzle holding section holds the inner nozzle and the outer nozzle. The orifice is in contact with the inner nozzle and is interposed between the nozzle holding section and the outer nozzle. The nozzle holding section has a first gas path connecting the air supply port disposed in the nozzle holding section and the orifice. The orifice has a third gas path for connecting a second gas path disposed between the inner nozzle and the outer nozzle, and the first gas path. In the vicinity of the tip of the nozzle unit, an opening connected to the second gas path is disposed.

主权项

1. A laser machining head comprising:
a collimation lens for making a laser beam parallel; a focusing lens for condensing the paralleled laser beam; and a nozzle unit through which the condensed laser beam is transmitted, the nozzle unit including:
a protective member for transmitting the laser beam;an inner nozzle through which the laser beam transmitted through the protective member passes;an outer nozzle disposed outside the inner nozzle;a nozzle holding section for holding the inner nozzle and the outer nozzle; andan orifice, having a ring shape, in contact with the inner nozzle and interposed between the nozzle holding section and the outer nozzle, wherein the nozzle holding section has a first gas path connecting the air supply port disposed in the nozzle holding section and the orifice, the orifice has a third gas path for connecting a second gas path disposed between the inner nozzle and the outer nozzle, and the first gas path, a plurality of the third gas paths is disposed in the orifice at regular intervals, each of the third gas paths is a through-hole connecting a side face and a bottom face of the orifice, and in a vicinity of a tip of the nozzle unit, an opening connected to the second gas path is disposed.