| 摘要 |
PURPOSE:To set a waiting time zero extending to start of welding from start of oscillation of a laser, by forming laser light to a slender spot, pointing its long diameter direction to the working scanning line direction of an object to be worked, and mutually superposing the slender spot. CONSTITUTION:Laser light 2 from a laser oscillator 1 expands in the direction of laser light 2', 2'', but it is reduced and made to form an image on a working surface 11 by a concave lens 3, a convex lens 4 and a condensing lens 8. The condensing lens 8 rotates in a state that it has been inclined in the circumferential direction side of an eccentric rotation of the lens, therefore, a laser spot becomes a slender spot D by sectional image dimention d1 of the output side of an energizing substance K in the radial direction, and dimension d2 being in proportion to an inclinded angle of the condensing lens 8. By a driving control device 10, the slender spot D points its lone axis d2 to a working scanning line (l), also irradiation of a circular locus of a diameter R, which is doubled so as to be superposed is executed, and weld-working is executed to the working surface 11. |
