拔制是以拉力使坯料穿过拉模的模孔，改变它的断面，以获得尺寸精确、表面光洁制品的塑性加工方法。
利用上界法推导了冷拔内螺旋凸筋管拔制力计算式。
The formulas of drawing force for spiral internal-ribbed pipe cold-drawing are derived with upperbound method.
因而，该解析解可在工程上计算圆管辊拔拔制力时推广应用。
So the solution can be used to calculation of drawing force during draw-out by idle rolls.
数值计算结果给出了管材在不同的拔制阶段的应变与应力分布。
The distributions of the strain and the stress of the pipe are obtained by the numerical computation.
应用推荐