Laser machine

Abstract

A laser machine comprises: a head including optical parts allowing reflection of a laser beam or allowing the laser beam to pass through, while being rotatable about rotary axes, and a focusing optical system that focuses the laser beam; a moving mechanism that allows the head and a target to move relative to each other; and a control unit that controls rotations of the optical parts in such a manner that an irradiation intended position to be reached by an emission optical axis when the laser beam is emitted to the target moves in a curvilinear pattern or a linear pattern, controls movement by the moving mechanism so as to move the head and the target relative to each other, and controls emission output from the laser source so as to change a condition for emitting the laser beam based on the rotation angles of the optical parts.

What is claimed is: 
     
         1 . A laser machine comprising:
 a machining head including a laser source that emits a laser beam, a mirror allowing reflection of the laser beam, while being rotatable about a rotary axis, and a lens that focuses the laser beam;   a plurality of motors that are configured to move, relative to one another, the machining head and a machining target to be machined with the laser beam; and   a motor configured to move the mirror in order to move an irradiation intended position of an emission optical axis in a linear pattern, wherein   emission output from the laser source is based on a condition for emitting the laser beam, and   the condition for emitting the laser beam is based on an absolute value of a composite speed so as to achieve a constant quantity of heat input per unit length, and successively in response to changes in the absolute value of the composite speed, the composite speed being obtained by combining a relative move speed at which the machining head is moved relative to the machining target and a tangential speed at which scanning with the emission optical axis proceeds in a curvilinear pattern.