【摘要】 本文从能量守恒原理出发推导了带张力和不带张力条件下不等直径辊轧制板带材时计算极限压下量的理论公式。用该公式计算的结果与按咬入条件确定的极限压下量相近似,与实验结果也基本相符。当两辊直径相等时,该公式即变为一般对称轧制过程中按咬入条件导出的极限压下量公式。由公式和实验可见,前张力（σ₁）和后张力（σ₀）的差值对极限压下量(Δh_max)有重大影响,当σ_O>σ₁时,Δh_max减小,而较大的前张力（σ₁>σ₀）则使Δh_max大为增加。因此为了提高不对称轧制过程的极限压下量,必须施加大的前张力。更多还原

【Abstract】 In this article theoretical formulas for calculating the maximum reduction in the case of sheetrolling between rolls of unequal diameter with or without tension are derived from the principle ofenergy conservation. The results calculated from these formulas are similar to the maximum reductiondetermined from the condition of nip angle, and are essentially consistent with the experimental re-sults. When the diameters of two work rolls are equal to each other, these formulas then become thesame as those derived from maximum nip angle in the commonly symmetrical rolling process. Itis evident from these formulas as well as the experiments that the difference between front tension（σ₁） and back tension （σ₀） has strong influence on the maximum reduction (△h_max). When σ₀>σ₁,△h_max is decreased, whereas greater front tension（σ₁>σ₀,）will make △h_max greatly increased. Conse-quently, in order to increase the maximum reduction in the unsymmetrical rolling process a highenough front tension must be applied.更多还原