Laser cutting machine

摘要

A laser cutting machine includes a driving apparatus for moving a laser head axially. An inner sleeve having a converging lens is coupled to the laser head. An outer sleeve having a nozzle is supported to move relative to the inner sleeve. A braking mechanism is arranged between the inner and outer sleeves to selectively lock the outer sleeve to the inner sleeve. An actuator moves a catch to selectively engage the outer sleeve, which holds the outer sleeve at a predetermined position. The driving apparatus moves the laser head when the outer sleeve is held at the predetermined position and the outer sleeve is released from the inner sleeve by the braking mechanism. This moves the outer sleeve relative to the inner sleeve and automatically adjusts the distance between the converging lens and the nozzle. This permits automation of a focal point position adjustment method.