Laser cutting method, laser cutting nozzle, and laser cutting device
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United States of America Patent
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Sep 8, 2015
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N/A
app pub date -
Feb 21, 2011
filing date -
Mar 29, 2010
priority date (Note) -
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Abstract
A laser cutting nozzle configured such that a laser beam is irradiated through a nozzle hole formed in a nozzle main body from an opening of the nozzle hole, and an assist gas surrounding the laser beam is emitted. The nozzle hole includes a first control flow path, a second control flow path, and a third control flow path formed in a coaxial cylindrical shape, in sequence from upstream toward downstream in a flow direction of the assist gas. If a diameter of the first control flow path is φA, a diameter of the second control flow path is φB, and a diameter of the third control flow path is φC, an equation φA<φC<φB is satisfied.
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