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Sheet metal cutting with a 2 kW radially polarized CO_2 laser

机译：用2 kW径向偏振CO_2激光切割金属板

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摘要

Laser processing of sheet metals are performed with a 2 kW cylindrically polarized CO_2 laser. Drilling and cutting capabilities are compared between conventional circular polarization and radial/azimuthal polarization beams of the same power. A 9 mm-thick mild steel is drilled with O_2 assist and azimuthal polarization shows a 15% faster drilling rate than circular polarization. A 4.5 mm-thick mild steel is cut with O_2 assist and radial polarization shows a 50% faster cutting speed than circular polarization. Smaller surface roughness of the cut is obtained by the radial polarization. A 2 mm-thick stainless steel is cut with high-pressure N_2 assist. Although no difference of the maximum cut speed between radial and circular polarizations are seen, it is possible to reduce the assist gas pressure from 0.6 MPa to 0.3 MPa in the case of radial polarization.
机译：钣金的激光加工是使用2 kW圆柱偏振CO_2激光进行的。比较了传统圆偏振光束和相同功率的径向/方位偏振光束的钻孔和切割能力。在O_2辅助下钻出9毫米厚的低碳钢，方位极化比圆极化快15％。在O_2辅助下切割了4.5毫米厚的低碳钢，径向极化比圆形极化快50％。通过径向极化可以获得较小的切口表面粗糙度。在高压N_2辅助下切割2毫米厚的不锈钢。尽管没有看到径向极化和圆极化之间的最大切割速度的差异，但是在径向极化的情况下可以将辅助气体压力从0.6 MPa降低到0.3 MPa。

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