通过镦粗内部带孔的圆柱体,并进行有限元法分析,可见等效应变与静水压力是控制孔洞闭合的两个主要因素。中心带孔圆棒料平砧间拔长的内部孔洞闭合的应力、应变,又受到砧宽、压下量,变形硬化系数的影响。本文分析方法用三维有限单元法作为钢锭开始的模型。通过三维分析,我们得到了闭合孔洞所需砧宽比与压下量的合理组合。 By upsetting the cylinder with holes inside and performing finite element analysis, it can be seen that the equivalent strain and hydrostatic pressure are the two main factors that control the hole closure. Center hole with round bar flat anvil long hole closed the internal stress and strain, but also by the anvil width, reduction, deformation hardening factor. The analytical method in this paper uses the three-dimensional finite element method as the ingot starting model. Through three-dimensional analysis, we have obtained a reasonable combination of anvil-width ratio and reduction required to close the hole.