| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a laser beam machining nozzle capable of machining even the bottom part of the object to be machined having a three-dimensional shape of the box shape having a deep depth to the size of the opening part and moreover providing with an electrostatic capacitor sensor capable of correctly measuring the distance between the object to be machined and the tip end of the nozzle without the affection of the work positioned at the side of the nozzle. SOLUTION: In the laser beam machining nozzle 3 formed a nozzle hole 21 capable of making the laser beam LB and an assist gas pass through, the nozzle combined the electrode of the electrostatic capacitor sensor detecting the electrostatic capacity between the tip end of the nozzle and the object to be machined is provided, the electrostatic shield electrode electrically insulated via an insulator is provided in the outer periphery of the nozzle, and the narrow interval zone part consisting of flat surface parts 13A, 13B parallel to the inclination of the funnel within the nozzle and moreover opposing each other is provided in one part of the outer periphery of the electrostatic shield electrode.</p> |
