锻压技术

先进高强钢帽形件链模成形数值模拟

英文标题：Numerical simulation on chain-die forming of hat-shaped part for advanced high strength steel

单位：1. 上海交通大学 2. 宝山钢铁股份有限公司研究院 3. 汽车用钢开发与应用技术国家重点实验室(宝钢) 4. 宁波赛乐福板材成型技术有限公司

分类号：TG335

出版年,卷(期):页码：2020,45(7):103-106

摘要：

建立了QP1180先进高强钢帽形件链模成形的ABAQUS/Standard有限元模型，对成形及回弹过程进行了模拟。分析了先进高强钢等截面帽形件链模成形的不同参数，包括上下模具间隙、法向接触方式、摩擦系数以及材料塑性定义方式，对底板圆角处最外层单元的最大主应变及与帽形件端部截面回弹形状的影响。结果表明，上下模具间隙与摩擦系数对帽形件底板圆角处最外层单元的最大主应变有显著影响，且该区域最大主应变随上下模具间隙的减小而增大，随摩擦系数的增大而增大；上下模具间隙、材料塑性定义方式以及摩擦系数对帽形件端部截面回弹形状具有较明显的影响。

The ABAQUS/Standard finite element model of chain-die forming for hat-shaped part of QP1180 advanced high strength steel was established, and its forming and springback processes were simulated. Then, the influences of different parameters of chain-die forming for hat-shaped part with constant section of advanced high strength steel, including the clearance between upper and lower dies, normal contact modes, friction coefficient and definition modes of material plasticity, on the maximum principal strain at the outermost layer element for rounded corners of baseplate and the springback shape of the end section for hat-shaped part were investigated. The results show that the clearance between upper and lower dies and friction coefficient have a significant effect on the maximum principal strain at the outermost layer element for rounded corners of baseplate, and the maximum principal strain of this region increases with the decreasing of clearance between upper and lower dies and the increasing of friction coefficient. Furthermore, the clearance between upper and lower dies, the definition modes of material plasticity and the friction coefficient have significant influence on the springback shape of the end section for hat-shaped part.

基金项目：

国家自然科学基金资助项目（U1860110）

梁振业(1993-)，男，博士研究生 E-mail：liangzhenye@sjtu.edu.cn 通讯作者：李大永(1973-)，男，博士，教授 E-mail：dyli@sjtu.edu.cn

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