| 摘要 |
<p>This invention relates to a laser machining apparatus which can execute an oblique cutting on a work by using a laser beam. A laser beam (1) is condensed by a condenser lens (1a) and is obliquely applied to a work (5). A nozzle (3) for an assist gas is held perpendicularly to the work (5), and an assist gas (3b) introduced via an assist gas inlet (3a) is jetted from the tip of the assist gas nozzle (3) and is blown to a machining point (5a) of the work (5) from above the machining point (5a). Because the assist gas is perpendicularly blown, a sufficient gas pressure is applied to the machining point (5a). Even when a groove (5b) is formed as oblique machining proceeds to move the machining point (5a), an optimum amount of assist gas (3b) is always supplied along the groove (5b). Thermal and chemical changes occur due to the laser beam (1) obliquely applied and the assist gas (3b) blown perpendicularly to melt the metal. The molten metal is quickly removed by the assist gas (3b). As a result, oblique cutting of the work (5) can smoothly proceed.</p> |
