双辊夹持板料旋压成形过程塑性变形行为的研究

双辊夹持式板料旋压成形是用来加工薄壁回转体法兰零件的新工艺。为了研究其旋压成形过程中的塑性变形行为，利用ABAQUS软件建立了双辊夹持旋压成形过程的三维有限元模型，并进行了薄壁回转体法兰零件的旋压成形过程的数值模拟，获得了成形过程中等效应力、应变及壁厚的分布。研究了翻边长度对成形件应力应变及壁厚减薄率的影响规律。结果表明等效应力、应变及最大壁厚减薄率均随着翻边长度的增大而增大，由此根据不同的毛坯材料可以确定相应的最大翻边长度。

Research on Plastic Deformation Behavior of Double Rollers Clamping Sheet Metal Spinning Process

Double rollers clamping sheet metal spinning is a new process to form thin-walled rotary shell parts with complex flange. In order to study the plastic deformation of the new process, FE simulation code ABAQUS/Explicit was used to build the 3D simulation model, and then the spinning process and material deformation were simulated. Distribution of equivalent stress, equivalent strain and wall thickness of flange were obtained. And the effect of flange length on the stress, strain and reduction in wall thickness of formed part was studied. Results show that equivalent stress, equivalent strain and maximum reduction in wall thickness increase with the increase of flange length, so the maximum flange length can be obtained according to different blank materials.