采用刚塑性有限元法对AZ31镁合金板材的轧制过程进行了数值模拟。分析了AZ31镁合金板材同步或异步轧制过程中,上下辊的转速比对板材的应力分布和沿板厚方向的等效应变影响。结果表明:随着上下辊转速比的减小,轧制后板材的应力增加;最大等效应变发生在辊速较大的板材一侧,分布曲线呈“U”型;异步轧制所需的轧制力较小。 The rigid plastic finite element method was used to simulate the rolling process of AZ31 magnesium alloy sheet. In the process of synchronous or asynchronous rolling of AZ31 magnesium alloy sheet, the effect of the speed ratio of the upper and lower rollers on the stress distribution and the equivalent strain along the thickness direction of the sheet was analyzed. The results show that the stress of the plate increases with the decrease of the speed ratio of the upper and lower rollers. The maximum equivalent strain occurs on the side of the plate with larger roller speed. The distribution curve is “U” The required rolling force is small.