Patent ID: 9149889
Filing Date: 2015-10-06
Classification: B23K

Abstract:
1. A method for orienting a focused laser beam relative to a nozzle axis of a cutting gas nozzle, the method comprising: producing a supersonic flow of cutting gas from the cutting gas nozzle; providing a laser beam along a first direction in a first structural unit of a laser processing head; redirecting, in the first structural unit, the laser beam from the first direction to a second direction; providing the laser beam along the second direction to a redirecting mirror arranged in a second structural unit of the laser processing head; rotating the redirecting mirror about the second direction or about an axis of the cutting gas nozzle, such that the laser beam is oriented eccentrically in an opening of the cutting gas nozzle relative to the nozzle axis, wherein the redirecting mirror is arranged in a beam path of the laser beam and upstream of the cutting gas nozzle; simultaneously rotating the second structural unit while rotating the redirecting mirror, wherein the rotation of the second structural unit is about the second direction and relative to the first structural unit, wherein rotating the redirecting mirror comprises rotating the redirecting mirror to a first angle of rotation α′ with respect to a rest position, where a beam reflection direction of the laser beam in the rest position extends coaxially with respect to the nozzle axis, and wherein the second structural unit is rotated to an angle equal to a difference between an oblique cutting angle α and the first angle of rotation α′.