双辊柔性滚弯成形过程三维有限元分析  

Three-dimensional finite element analysis of two-roller flexible bending process

作　　者：杨昆瑛 方刚[1] 曾攀[1] 雷丽萍[1] 张从发[2] YANG Kun-ying;FANG Gang;ZENG Pan;LEI Li-ping;ZHANG Cong-fa(Department of Mechanical Engineering,Tsinghua University,Beijing 100084,China;Institute of Spacecraft System Engineering CAST,Beijing 100094,China)

机构地区：[1]清华大学机械工程系,北京100084 [2]北京空间飞行器总体设计部,北京100094

出　　处：《塑性工程学报》2020年第8期31-38,共8页Journal of Plasticity Engineering

基　　金：国家重点研发计划项目(2017YFB0701800)。

摘　　要：基于ABAQUS平台,针对3J21弹簧钢带材双辊柔性滚弯成形的特点,进行了合理简化和假设,建立了有限元模型,实现了对双辊柔性滚弯成形过程的模拟。对建模过程中几何模型与材料模型的建立、约束与接触的定义、边界条件与分析步的设定等关键过程进行了详细介绍,并利用能量平衡方法验证了模拟过程为准静态模拟。在此基础上,设计了一部小型双辊滚弯机,对0.15 mm厚的3J21弹簧钢带材开展了滚弯成形实验。结果表明:在不同压下量时,实验与模拟结果的相对误差在10%以内,说明所建立的有限元模型能够准确计算带材在滚弯和回弹后的成形。Based on ABAQUS platform,reasonable simplification and assumption were made for the characteristics of two-roller flexible bending of 3 J21 spring steel strip. The finite element model was established and the simulation of two-roller flexible bending process was realized. The key processes such as the establishment of geometric model and material model,the definition of constraints and contacts,the setting of boundary conditions and analysis steps in the modeling process were introduced in detail,and the energy balance method was used to verify that the simulation process was quasi-static simulation. On this basis,a lab-scale two-roller bending machine was developed,and 3 J21 spring steel strip with 0. 15 mm thickness was applied to the bending experiment. The results show that the relative error between the experimental results and the simulated results is less than 10% under different reductions,which indicates that the established finite element model can accurately calculate the forming of strip after bending and springback.

关 键 词：双辊柔性滚弯成形 能量平衡 回弹 有限元模拟 

分 类 号：TG156[金属学及工艺—热处理]