And smaller sizes, and this issue we designed a multi-position progressive die forming.
并且尺寸较小，本课题设计了一个多工位级进模成型。
In order to reduce the cost, raised the benefit, we used the self-made forming die forming.
为了降低成本，提高效益，采用可以自制的成形模成形。
The numerical simulation of hot die forming process for upper core plate stock in railway was done.
对铁路用上心盘热模压成形过程进行了数值模拟分析，得到了上心盘成形过程的应力场、应变场。
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