隨著3C產品需求日益增加，產品中的金屬零件需求量及精度要求也隨之提高。精微沖切常應用於生產高規格零件，此製程生產效率高且精度高，但沖切L形工件後常在轉角處及尖端處產生回彈造成翹曲及偏移現象，雖可透過多道次的沖切來降低回彈量，但製程參數眾多，且沖切順序對回彈的影響如何均有待釐清。
本研究探討厚度0.38mm C15150純銅多道次精微沖切製程，透過有限元素軟體LS-DYNA3D為分析方法結合田口法，考慮製程參數對沖切後回彈量之影響，產生出最佳參數組合。研究結果顯示，影響回彈的製程參數依序是沖切速度、純壓料力量、沖切順序、壓料應力。

With the increasing need of 3C products, the requirements of accuracy of metal parts are higher. Fine blanking is used for making high precision products with high productivity. However, L-shape parts would springback at corner and tip after blanking process. Although springback could be reduced by multi-stages, it is affected by many process parameters, especially the blanking sequence.
This thesis studies the multi-stages fine blanking process of C15150 brass sheet with thickness 0.38mm. This study used finite element software LS-DYNA3D and combined with Taguchi method to investigate the effect of blanking process parameters on springback and the optimal process parameters were obtained. The results indicates that the order of process parameters affecting springback are the punch velocity, the pure pressure, the blanking sequence, and the blank holder stress.

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