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中文摘要：
针对实际冲压件提出了一种基于逆向工程技术的回弹评测方式．对实际冲压件进行激光扫描后重构出型面，根据弹性变形的特点对模型进行强制变形以找到节点的对应关系，并根据CAD模型的几何中心计算出曲面的重合点，以对应节点的距离为适应度函数利用遗传算法搜寻出最佳旋转位置，并计算出各节点的法向偏移距离作为该节点的回弹量．该方法实现了对冲压件各个部分回弹的精确评测，从而可以为模具的修整提供正确的指导．
英文摘要：
This paper put forward a way to estimate the springback of real stamping part based on reverse engineering（RE）. The surface of the real stamping part was reconstructed by laser scanning, and the nodes mapping relationship was acquired by means of compelling deformation simulation. The overlap node of surfaces was acquired according to the geometry center of CAD model, the best rotating position was acquired by genetic algorithm（GA） taking mapping nodes＇ distance as fitness function, the normal distance of nodes was calculated, and it was taken as the springback value. The method has realized the accurate estimation of each part of stamping part, and it can offer correct guidance for the amendment of the mould.
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