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Laser piercing method

  • US 6,693,256 B2
  • Filed: 04/26/2002
  • Issued: 02/17/2004
  • Est. Priority Date: 05/08/2001
  • Status: Expired due to Fees
First Claim
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1. A laser piercing method for piercing a workpiece by irradiating laser beam to the workpiece and injecting an assist gas to the workpiece;

  • the laser piercing method comprising;

    a piercing stage being performed by setting the level of a nozzle during piercing execution to a value higher than the level of the nozzle during cutting execution and setting the pressure of the assist gas during piercing execution to a value higher than the pressure of the assist gas during cutting execution; and

    a cutting stage being performed subsequent to the piercing stage and being performed by changing the level of the nozzle and the pressure of the assist gas to the level of the nozzle and the pressure of the assist gas during cutting execution.

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