| 摘要 |
PURPOSE:To prevent deformation and burning, and to decrease adhesion of dross by applying diagonally a pressure fluid to the reverse side of a working material from an annular inclined jet port of a suction mouthpiece which has been fitted to a pedestal, and cooling a working part whose temperature has been raised by laser beams of the working material. CONSTITUTION:A suction mouthpiece 40 is fitted to a through-hole 31 which has been provided in the center of a pedestal 30 on which plural swivel bearings 32 are provided. This suction mouthpiece 40 is constituted of a combination of a truncated lower base body 41 in which a through-hole 43 has been formed in the center, and an upper base body 45 for forming an inclined jet port 47 against an inclined surface 42 of the outside periphery of this lower base body 41, and also a fluid passage 49 is formed by both the base bodies 41, 45. A pressure fluid which has been supplied from the fluid passage 49 is jetted diagonally and applied to the reverse side of a working material W from the annular inclined jet port 47, cools the working material W, and simultaneously, passes through the lower direction from the through-hole 43 of the lower base body 41, and in this case, a working residue and gas generated by working of laser beams 11 are absorbed and eliminated efficiently. Accordingly, deformation and burning of the working material W are prevented, and adhesion of dross is reduced. |
