光纤激光切割工艺参数对切割质量的影响

Influence of process parameters on cutting quality in optical fiber laser cutting

采用3000 W光纤激光器与数控机床组成的光纤激光切割系统,对1.4 mm厚的热成形高强钢薄板切割质量的影响规律进行了研究。设计了3因素5水平的正交实验,并系统地研究了激光功率、切割速度以及辅助气体压力等工艺参数对切缝宽度和挂渣高度的影响。实验结果表明,激光功率和切割速度是影响切缝质量的主要工艺参数。当激光功率为3000 W、切割速度v为11 m·min^-1、辅助气体压力F为1.1 MPa、喷嘴与工件的间距Δ为0.8 mm时,得到最小的挂渣高度为46.32μm。

The influence law of cutting quality for thermoforming high strength steel sheet with the thickness of 1.4 mm was studied by the optical fiber laser cutting system composed of 3000 W optical fiber laser and CNC machine tool.Then,the orthogonal experiment with three factors and five levers was designed,and the influences of laser power,cutting speed,auxiliary gas pressure and other process parameters on the slit width and the slag height were systematically studied.The experimental results show that the laser power and the cutting speed are the main process parameters that affect the quality of slit.When the laser power is 3000 W,the cutting speed v is 11 m·min^-1,the auxiliary gas pressure F is 1.1 MPa and the distanceΔbetween nozzle and workpiece is 0.8 mm,the minimum slag height obtained is 46.32μm.