锻压技术

某轻卡后下防护热辊弯轻量化方案设计与开发

英文标题：Design and development on a lightweight scheme of hot roll bending for rear underrun protection of a light truck

作者：陈仙风1 2 石磊1 2 王振岩3

单位：1.宝山钢铁股份有限公司 2.汽车用钢开发与应用技术国家重点实验室(宝钢) 3.安徽江淮汽车集团股份有限公司

分类号：TG386

出版年,卷(期):页码：2022,47(4):134-140

摘要：

设计了某轻卡后下防护热辊弯全管状结构方案，实现轻量化30.2%。根据静态加载试验要求，建立仿真评估模型，并试验验证仿真模型的准确性。基于试验结果建立仿真模型，并比较了原设计方案与热辊弯优化设计方案的各个使用性能。采用热辊弯工艺进行横杆和各支架管的样件试制，获得抗拉强度大于或等于1500 MPa的管件；在热辊弯加热弯曲状态下实现支架管弯曲半径为2d的小半径弯曲且不起皱，并通过两件拼接加工提升了材料利用率及加工效率。研究结果表明：热辊弯管状结构适用于后下防护，其结构简单、通用性强、制造流程短，具有材料与工艺综合成本低的技术优势。

The hot roll bending full tubular structure scheme of rear underrun protection for a light truck was designed, and a light weight of 30.2% was achieved. According to the requirements of static loading test, the simulation evaluation model was established, and the accuracy of the simulation model was verified by the test. The simulation model was established based on the test results, the individual performances of the original design scheme and the hot roll bending optimization deisgn scheme were compared. Then, the cross-bar and each bracket tube were trial-produced by the hot roll bending process to obtain the tubes with tensile strength greater than or equal to 1500 MPa, and in the hot bending state of hot roll bending, the bracket tube with the bending radius of 2d was realized without wrinkling. Furthermore, the material utilization rate and the processing efficiency were improved by splicing and processing two pieces. The results show that the hotroll bending tubular structure is suitable for rear underrun protection, which has simple structure, strong universality and short manufacturing process, and can realize the technical advantages of low comprehensive cost for materials and processes.

基金项目：

作者简介：陈仙风（1976-），女，博士，高级工程师 E-mail：chenxianfeng@baosteel.com

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