Abstract: A standard resilience verification model is established for the resilience of the sheet in the digital single point progressive forming process and the internal corner spacing dimension is used as the evaluation criterion. The four process parameters affecting the resilience characteristics are found and optimised using design for six Sigma thinking using an orthogonal approach to find the optimal process parameter card for the resilience characteristics through signal to noise ratio analysis. The process package with the optimum parameters for the resilience characteristics was a maximum layer spacing of 1.2 mm, a one-way contour path forming trajectory, and a feed rate of 8 000 mm/min in the maximum speed mode. Using the optimised parameter package, it was found that the resilience was reduced from 5 mm to 1 mm, the resilience rate was reduced from 1.9% to 0.5%, and the resilience was reduced by 4 mm, with significant results.

Key words: Single point progressive mouldless forming; Resilience properties; Combination of process parameters; Optimization of process parameters

摘要： 针对数字化单点渐进成型过程的板料回弹问题，建立标准回弹验证模型，并以内角间 距尺寸作为评价标准，找到影响回弹特性的四大工艺参数，运用六西格玛设计思维使用正交 方法优化试验，通过信号噪声比分析，找到回弹特性最优的工艺参数卡片。回弹特性最优参数 工艺包为最大层间距 1.2 mm，单向等高路径成型轨迹，进给速度选择最大速度模式 8 000 mm/ min。 使用优化后的参数包发现，回弹量从 5 mm 降低至 1 mm，回弹率从 1.9%降低至 0.5%，回弹 量降低了 4 mm，效果明显。

关键词: 单点渐进无模成型；回弹特性；正交试验；工艺参数优化