Patent ID: 6492617
Filing Date: 2002-12-10
Classification: B23K

Abstract:
A piercing device for a laser cutter, said laser cutter provided with a cutting nozzle, in which there is formed a laser beam hole through which the laser beam for irradiating the cutting material passes, this cutting nozzle blowing an assist gas sent on the same axis as the laser beam through said laser beam hole toward the cutting material; and a side blow gas nozzle for blowing a separate side blow gas from the side of the laser beam hole toward the laser beam's radiating site on the cutting material, at an incline with respect to the cutting material's surface; wherein:a hood having a communicating hole which transmits said laser beam and said assist gas is attached only to said side blow gas nozzle so as to be provided between said cutting nozzle and said side blow gas nozzle.