LASER BEAM MACHINING METHOD FOR EXTERNAL SHAPE

摘要

PURPOSE:To improve the roughness and linearity of a cutting plane by fitting the focusing position of a laser beam to the bottom of a green sheet or the position slightly lower than it to perform the laser beam machining. CONSTITUTION:The focusing position 4 of the laser beam 3 is arranged so as to be set about 0-3 mm lower than the bottom of the green sheet 1 and the laser beam 3 is condensed by a condensing lens 2 and a focus is fitted to the focusing position 4. N2 is used for assisting gas and filled from an assisting gas inlet 6 and jetted from a nozzle 5. In this way, there is no torsion on the cutting plane of the green sheet 1 and the roughness of the cutting plane is also improved and the cutting accuracy of an external shape is improved.