| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a nozzle for use in discharging slag generated during a piercing operation which can be applied to any one of a gas cutting flame port, a plasma cutting flame port or a laser cutting flame port. SOLUTION: A nozzle A is comprised of a main body member 5 and a nozzle member 6. A center of the main body member 5 is formed with a fitting hole 1 to which a flame port B is fitted. The nozzle member 6 is formed with a plurality of injection holes 2. The injection holes 2 are used for injecting either oxidization gas or inert gas toward material to be cut during a piercing operation. One of the injection holes 2 is formed for every plurality of linear lines passing through an axis line 3 of the flame port B fitted to the fitting hole 1. Accordingly, gas injected from the injection holes 2 does not interfere with gas injected from another injection hold and the slag generated at the time of piercing operation is adhered in a radial direction. Due to this fact, it is possible to start a cutting operation in an easy manner from the end section where no slag is adhered at the hole.</p> |
