In directed energy deposition, the layer height command must match the actual clad height to maintain the standoff distance as constant between a deposition nozzle and workpiece. In this paper, an in-process layer-height-command updating method based on the on-machine measurement of the workpiece height is proposed. Our proposed method minimizes the required number of measurements to enhance process efficiency while maintaining the standoff distance fluctuation within tolerance. Additionally, the measurement interval is systematically determined by considering the tolerance and estimated difference between the layer height command and actual clad height, and the validity of the method was experimentally demonstrated.

在定向能量沉积中，层高命令必须与实际包层高度匹配，以将支座距离保持在沉积喷嘴和工件之间恒定。提出了一种基于工件高度在线测量的加工中层高指令更新方法。我们提出的方法最大程度地减少了所需的测量次数，以提高过程效率，同时将支座距离波动保持在公差范围内。另外，通过考虑层高度指令与实际包层高度之间的公差和估计差来系统地确定测量间隔，并通过实验证明了该方法的有效性。