| 摘要 |
PURPOSE:To constrain the consumption of a working gas and to increase the working capability by providing the cylindrical working gas diffusion preventing body to prevent the diffusion of the working gas jetted on the work part of the body to be worked. CONSTITUTION:The cutting is performed with jetting from the blowing out port 8 of a nozzle 4 a working gas 5 by irrediating on the work part of the body 6 to be worked by condensing a laser beam 1 with a condenser lens 2. In this case, due to the vicinity of the cutting of the body 6 to be worked being covered by a closed ring 9 the jetted working gas 5 passes through the cutting part of the body 6 to be worked effectively without its diffusion. The purity of the working gas 5 is not reduced as well because of its being not mixed with the surrounding atmosphere. The working capability is therefore increased at lower running cost. |
