本文讨论了限制宽展程度的数学表达式和限制宽展程度系数对开口切入孔型中变形的影响。实验是在φ130二辊实验轧机上用铅试料进行的。根据实验数据利用数理统计方法建立了予报凸缘高向拉缩系数和轧件宽展系数的回归方程。通过分析和比较,这些回归方程可写成如下形式λ=λ_o+K_1η(((B_o)/(B_k))-1),β=β_o-K_2η(((B_o)/(B_k))-1). In this paper, we discuss the effects of the mathematical expressions that limit the extent of expansion and the coefficients that limit the degree of wideness on the deformation in the cut-hole pattern. The experiment was carried out on a φ130 two-roll mill with lead test material. Based on the experimental data, the regression equations of the high-profile flange coefficient and the rolling coefficient of the flange are established by mathematical statistics. Through analysis and comparison, these regression equations can be written as follows: λ = λ_o + K_1η ((B_o) / (B_k)) - 1), β = β_o-K_2η ((B_o) / (B_k)) - 1).