| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce sticking of dross to a lead or the like by emitting a laser beam to a cutting part, providing in the center an opening for injecting an assist gas and preparing the injecting ports of the gas around the opening. SOLUTION: The lead frame cutting device is such that the cutting nozzle 5 has a nozzle opening 18 through which a laser beam 2 from a laser generator is emitted to the tie-bar 12 of the lead frame 9 and through which an assist gas is also injected, that blow-off ports 19 are provided in addition to and around the opening 18, and that a lower auxiliary nozzle 15 is further installed which injects the assist gas to the opposite side of the cutting nozzle 5 through the lead frame 9. As a result, the flow of the assist gas is uniformized in cutting the tie-bar 12.</p> |
