Plastic flow of hollow cylinders under combining axial compression with torsion was examined in upsetting and in lateral extrusion. The hollow cylinders with initial height/outer diameter of 0.5–2.5 and initial inner/outer diameter of 0.3–0.9 were compressed/extruded and simultaneously twisted with respect to the axisymmetric forging axis in one-way or cyclic alternating. Due to superposition of torsional shear stress, the lateral metal flow was found to be assisted. Barreling of the workpiece was reduced by approximately 10 % in upsetting with torsion/compression speed of 6 °/mm. The enhancement of the plastic flow in upsetting was applied to fill up tooth cavity in lateral extrusion. The extruded tooth depth of the workpiece was approximately 5–7% larger in lateral extrusion with torsion/extrusion speed of 30°/mm. In addition, cyclic alternating torsion was effective to extrude evenly in the tooth thickness direction due to the periodic reversal of die rotation in peripheral direction.

在镦粗和横向挤压中检查了在轴向压缩与扭转相结合的空心圆柱体的塑性流动。初始高度/外径为 0.5-2.5 和初始内/外径为 0.3-0.9 的空心圆柱体被压缩/挤压并同时相对于轴对称锻造轴以单向或循环交替方式扭曲。由于扭转剪切应力的叠加，横向金属流动被发现是有帮助的。在 6°/mm 的扭转/压缩速度下镦粗时，工件的滚边减少了大约 10%。在镦粗中增强塑性流动用于填充横向挤压中的牙腔。在扭转/挤压速度为 30°/mm 的横向挤压中，工件的挤压齿深大约大 5-7%。此外，