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以氧为辅助气体的激光切割工艺切割不锈钢等特种钢板时容易产生挂渣现象,因此大多采用高压高纯度氮气或惰性气体辅助激光切割不锈钢。在对熔渣形成原因及规律进行实验研究的前提下,提出了仍以氧辅助切割以降低激光切割功率,通过在工件底部加设旋风除渣器,形成旋转气流控制熔渣流向以去除熔渣的方法。实验证明,当同轴辅助切割气体为氧气,气体压力降低为300 kPa,旋转气流引导装置气体压力为100 kPa,激光功率为500 W,模式为TEM01,焦点位于0.5 mm厚硅钢片工件上表面,切割速度为3 m/min时,可获得光滑的高质量切口。
Oxygen-assisted laser cutting process is easy to produce dross when stainless steel and other special steel, so most of the high-pressure high-purity nitrogen or inert gas-assisted laser cutting stainless steel. Based on the experimental study on the causes and rules of formation of slag, it is proposed that oxygen-assisted cutting is still used to reduce the laser cutting power. By adding a cyclone separator at the bottom of the workpiece, a rotating air flow is formed to control the flow of slag to remove slag Methods. Experiments show that when the coaxial cutting gas is oxygen, the pressure of the gas is reduced to 300 kPa, the gas pressure of the rotating gas flow guiding device is 100 kPa, the laser power is 500 W, the mode is TEM01, the focus is on the upper surface of the 0.5 mm thick silicon steel sheet workpiece, A smooth, high quality cutout is obtained at a cutting speed of 3 m / min.