| 摘要 |
<p>PCT No. PCT/DK87/00103 Sec. 371 Date Apr. 26, 1988 Sec. 102(e) Date Apr. 26, 1988 PCT Filed Aug. 21, 1987 PCT Pub. No. WO88/01553 PCT Pub. Date Mar. 10, 1988.A nozzle for laser processing, such as a cutting, the processing allowing a laser beam (A) to be directed towards an article being processed, and whereby the laser beam is supported by a gas flow directed towards the article through the nozzle. According to the invention the nozzle (11) is able to maintain a displacement of the focusing point (D) of the laser beam relative to a center of the pressure (C) for the gas flow through the nozzle, whereby the laser beam (A) is displaced forwards in the processing direction relative to the center of gas pressure (C). As a result the laser beam meets the article first and melts this portion of the article, the portion subsequently being blown away by the gas flow. In this manner the gas flow is efficiently utilized because it does not meet the article until the material to be removed has melted and is thereby removable by blowing.</p> |
