金属板材直线单曲面激光弯曲成形研究

Experimental Study on Line Single Surface Laser Bending Process of Sheet Metal

激光成形技术的最大难点在于要制作出满足预定形状及尺寸要求的工件。针对板材直线单曲面预定形状,提出了基于等弦长准则算法,在给定形状误差下,把扫描路径按照等弦长与不同弯曲角度的方式进行规划。基于这种算法需求,试验研究了激光线能量、扫描次数等激光工艺参数与弯曲角度的关系。在实验过程中,构造了实时监测系统对弯曲角度进行测量。结果表明,在一定的参数范围内,激光线能量、扫描次数均与弯曲角度呈现较好的线性关系。按照规划好的扫描路径进行试验,验证了基于这种算法规划扫描路径方法的可行性。

The biggest challenge of laser forming technology is how to fulfill the requirements of the workpiece shape and size. Equivalent length-based criterion algorithm is proposed for a scheduled line single surface. Scanning path is planned within the given shape error, according to the way of equivalent length and different bending angles. Based on the algorithm requirement, the relationship between process parameters and bending angles is researched. During the experiments, bending angles are measured by a real-time monitoring system. The experimental results reveal that the laser bending angles are linearly proportional to the number of irradiations and laser line energy in a certain parameter range. Then, the experiments according to scanning paths verify the applicability of the proposed method.