... succeeding stretch roller 二次拉伸辊 succeeding stretch 二次拉伸；继续拉伸；导丝盘间拉伸 succesion tectonic 继承性构造 ...
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介绍了一种实现筒形类零件二次拉伸的简易模具结构，为类似零件的生产制造提供参考。
A kind of simple die structure which can realize the re-drawing of barrel-shape parts is introduced, which can be referenced by similar parts manufacture.
分析了小圆角圆筒件的成形工艺性，利用成本较低、塑性较差的角料，采用一次冲压工序完成二次拉伸的复合模。
Adopting once punching process and using fewer cost and worse plasticity leftover material finish twice drawing of compound die.
研究结果表明，混凝土早期自收缩大小与相应的极限拉伸应变具有显著的二次曲线关系；
Research results show that the relationship between autogenous shrinkage at early ages and ultimate tensile strain can be approximately figured by a quadric equation.
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