Plane strain compression of cylindrical billets with flat dies has been studied in this paper. A deformation model has been proposed and the dimensions of the deformed billet cross-section for a given press stroke have been determined. To analyze the process, two types of theoretical approaches, i.e., the upper bound technique and the slab method of analysis have been applied and the required forming load has been estimated. Analytical results of billet cross-section deformed geometry and compression load have been compared with the finite element data obtained by the DEFORM 2D ver11.0 finite element package. It is shown that there is a satisfactory agreement between the theoretical predictions and the FE simulation data. The solution can be used in industrial applications for evaluating the required press load to deform the long circular cross-section billets, which is essential for selecting the forming machine with enough capacity.

本文研究了平模圆柱坯的平面应变压缩。已经提出了变形模型，并确定了给定冲压行程的变形​​坯料横截面的尺寸。为了分析该过程，应用了两种理论方法，即上限技术和板坯分析方法，并估计了所需的成形载荷。钢坯截面变形几何形状和压缩载荷的分析结果已与 DEFORM 2D ver11.0 有限元包获得的有限元数据进行了比较。结果表明，理论预测与有限元模拟数据之间存在令人满意的一致性。