锻压技术

航天薄壁弯管零件充液压弯成形技术

英文标题：Hydro-bending technology on aerospace thin-walled elbow parts

作者：林磊杨睿萌贺飞飞钟涵郑森木游文卓

分类号：TG386.3

出版年,卷(期):页码：2021,46(4):63-69

摘要：

针对航天弯管零件在实际生产中材料利用率低、产品质量一致性差等问题，采用充液压弯成形技术代替现有工艺方法,通过单向拉伸试验获得0Cr18Ni9不锈钢薄壁管的基本力学性能，基于有限元仿真平台进行数值模拟，对0Cr18Ni9不锈钢薄壁管的充液压弯成形工艺进行研究，获得了充液压力P、成形半径R、摩擦系数μ对充液压弯成形的影响规律，优化了工艺参数，且通过工艺试验验证了其可行性和准确性。结果表明：合理控制薄壁管的充液压力和成形半径，可以有效提高薄壁管的成形性能；良好的润滑条件能够提高管材的成形性能、显著改善产品的成形质量。

In view of the problems of low material utilization rate and poor product quality consistency in the process of practical production for aerospace elbow parts, the hydro-bending technology was used to replace the existing process method, and the basic mechanical properties of 0Cr18Ni9 stainless steel thin-walled tube were obtained by unidirectional tensile test. Then, the hydro-bending process of 0Cr18Ni9 stainless stee thin-walled tube was studied by the finite element simulation platform, and the influence laws of hydraulic pressure P, forming radius R, and friction coefficient μ on hydro-bending were obtained. Furthermore, the process parameters were optimized, and the feasibility and accuracy were verified by process tests. The results show that the reasonable control of hydraulic pressure and forming radius for thin-walled tube effectively improves the formability of thin-walled tube, and the good lubrication condition increases the formability of tube and significantly improves the forming quality of product.

基金项目：

国家自然科学基金委员会-中国航天科技集团有限公司航天先进制造技术研究联合基金（U1737203）

林磊（1989-），男，硕士，工程师 E-mail：abraham74@163.com

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