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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 with laser forming technology is the ability to create workpieces that meet the pre-determined shape and size requirements. Aiming at the predetermined shape of linear single surface of sheet metal, an algorithm based on equal length chord rule is proposed to plan the scanning path according to the chord length and different bending angles under a given shape error. Based on the requirement of this algorithm, the relationship between the laser process parameters such as laser line energy and scanning times and the bending angle was experimentally studied. During the experiment, a real-time monitoring system was constructed to measure the bending angle. The results show that the laser energy, the number of scanning and the bending angle show a good linear relationship within a certain range of parameters. According to the planned scan path, the feasibility of planning scan path based on this algorithm is verified.