Computer simulation of the processes of three- and four-roller screw rolling was performed using the QForm finite element analysis computing environment with a constant and variable friction factor for roll–billet pairs. Simulation results at a constant friction factor showed that in the longitudinal section of the billet after four-roller rolling, the average value of the accumulated deformation is higher compared to three-roller rolling, and the deformation penetrates deep into the billet. The results also showed that four-roller rolling proceeds faster than three-roller rolling with a constant and variable friction factor. An analysis of the estimated speed of the billet movement during three- and four-roller rolling revealed that the return to a stable process after a sharp decrease in speed occurs faster in four-roller screw rolling than in three-roller rolling due to insufficient friction between the roll and the billet.

使用 QForm 有限元分析计算环境对三辊和四辊螺旋轧制过程进行计算机模拟，并对辊坯对采用恒定和可变的摩擦系数。恒定摩擦系数下的模拟结果表明，四辊轧制后的钢坯纵截面中，累积变形平均值较三辊轧制更高，且变形深入钢坯内部。结果还表明，在恒定和可变的摩擦系数下，四辊轧制比三辊轧制进行得更快。对三辊和四辊轧制过程中钢坯运动估计速度的分析表明，由于摩擦力不足，四辊螺旋轧制在速度急剧下降后恢复到稳定过程的速度比三辊轧制更快轧辊和钢坯之间。