The formulas of drawing force for spiral internal-ribbed pipe cold-drawing are derived with upperbound method.

利用上界法推导了冷拔内螺旋凸筋管拔制力计算式。

youdao

The formulas of drawing force for spiral internal-ribbed pipe cold-drawing are derived with upperbound method.

利用上界法推导了冷拔内螺旋凸筋管拔制力计算式。

youdao