动光式激光切割无缝拼接技术的研究与应用

为了提高动光式激光切割振镜加工网格之间的拼接精度,首先采用线性插值方法,补偿激光光点在不同区域内两轴的区域系数,再利用射影变换建立任意两个平面之间点的射影变换矩阵,以补偿双振镜的梯形以及菱形畸变,通过上述补偿保证整个扫描场中所有的坐标都符合一个线性的比例关系。将该方法应用于柔性印制电路板的切割,得到的切割精度和效率远高于普通的定光式切割。结果表明,通过以上方法的补偿后,激光切割系统的网格之间拼接精度大幅度提升,达到国外最新同类系统的精度与效率,具有广阔的应用前景。

Research and application of dynamic-optic-type laser cutting and seamless splicing technology

In order to study how to improve splicing precision between galvanometer processing grids cut by dynamic-optic-type laser,a seamless splicing method for grids was introduced.Firstly,the area coefficients of laser points for both axes were compensated with linear interpolation.Then projective transformation was applied to establish the projective transformation matrixes of points in two optional planes to compensate trapezium and diamond distortion of dual galvanometers.After the above compensation,all coordinates in the entire scanning filed accord with a certain linear proportion relationship.Applying this method to cut flexible printed circuit board,experimental results showed that cutting precision and efficiency of this system were much higher than ordinary static-optic-type cutting.The splicing precision between grids of laser cutting system is greatly improved up to the precision and efficiency of the latest foreign system of the same kind.