| 摘要 |
PURPOSE:To provide the laser beam machining method and machine capable of meeting both of oxidation prevention and oxidation acceleration on the irradiation surface in laser beam machining to plot various patterns on the metal surface. CONSTITUTION:A metallic material 4 to be machined having an external form of a body of rotation is mounted on a rotary table 3, an opening edge 7a of a gas blowing pipe 7 of a scanning head 2 is brought close to the surface thereof and inert gas or gaseous oxygen or gas 19 having high oxygen concentration is blown against the whole of the scanning area of the surface of the material 4 to be machined through the scanning head 2 from the gas blowing pipe 7. The rotary table 3 is then driven to rotate continuously or intermittently and the metal surface is irradiated with a laser beam 9 to carry out plotting by an irradiation locus while the scanning surface is renewed. |
