The reasonable shape of the blank can improve the formability of the sheet metal, make full use of the material, decrease the work of finishing repair.
Yoshida Buckling test (YBT) which has been developed by Japanese famous scholar Yoshida is a notable test for appraising the sheet stamping formability.
方板对角拉伸试验即y BT模型是日本冲压行业著名学者吉田清太提出的评价板材冲压成形性能的著名试验。
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The simulation test results obviously showed that VBHF had great effects to drawing formability of hot-galvanized sheet steel during the rectangular box drawing.