通过3轮冲压SE，不仅解决了成型性问题，模具从5序减为4序，材料利用率使材料利用率从38.60%提高到55.2%.
Through 3 cycles of stamping  SE, not only the formability problem has been solved, but the process steps is reduced from 5 to 4 and  the Material utilization ratio is improved from 38.6 percent to 55.2.