| Summary: | 碩士 === 國立成功大學 === 機械工程學系碩博士班 === 101 === 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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