研究了激光入射角对薄板切割质量的影响 ,结果表明 ,在一定条件下 ,激光束不垂直工件表面时 ,仍可以获得切缝细、挂渣少的切割效果。同时切割头的运动方向在激光束不垂直于被加工表面时 ,对切割质量也有显著影响。给出了在三维激光切割时 ,由于干涉等原因无法保证激光束垂直入射时 ,为得到好的切割质量应采取的措施 The influence of laser incident angle on the quality of the thin plate is studied. The results show that under certain conditions, the laser beam can still get the cutting effect with less sliver and less hanging when the laser beam is not perpendicular to the workpiece surface. At the same time the cutting head movement direction of the laser beam is not perpendicular to the machined surface, the cutting quality also has a significant impact. The measures to be taken to get a good cutting quality when the laser beam can not be perpendicularly incident due to interference or the like are given in the three-dimensional laser cutting