锻压技术

不锈钢连续多弯导管数控弯曲成形数值仿真与工艺优化

英文标题：Numerical simulation and process optimization on NC bending for stainless steel continuous multi-bend tube

单位：1.四川航天长征装备制造有限公司研发中心 2. 火箭军装备部驻成都地区第一军事代表室

分类号：TG386

出版年,卷(期):页码：2022,47(8):105-111

摘要：

针对0Cr18Ni9不锈钢连续多弯导管在实际生产中成形质量差、尺寸精度低的问题，采用数控弯曲成形数值仿真的方法优化工艺参数，提高产品的成形质量。基于有限元仿真平台，建立管材数控弯曲成形、抽芯及回弹的三维有限元模型，并通过仿真与试验结果的对比验证模型的准确性。由于连续多弯导管由多个弯曲段组成，首先研究各个弯头成形过程中的关键工艺参数对成形结果的影响，对工艺参数组合进行优化，基于此进行连续多弯导管成形仿真。结果表明：简单采用各个单弯管件的最优工艺参数的组合进行连续多弯导管的成形并不能得到合格的管件，通过调整前后两次弯制的弯曲角度组合，补偿两个弯头之间的应力干涉对成形精度的影响，获得了成形质量满足要求的合格产品。

For the problems of poor forming quality and low dimensional accuracy for 0Cr18Ni9 stainless steel continuous multi-bend tube in the practical production, the process parameters were optimized by numerical simulation method of NC bending to improve the forming quality of products. Then, based on the finite element simulation platform, a three-dimensional finite element model of tube NC bending, mandrel retracting and springback was established, and the accuracy of the model was verified by comparing the simulation and test results. Since the continuous multi-bend tube was composed of multiple bending sections, the influences of key process parameters in the forming process for each elbow on the forming results were studied firstly, and the combination of process parameters was optimized. Based on this, the forming simulation of continuous multi-bend tube was carried out. The results show that the qualified tube cannot obtained by simply using the optimal process parameter combination of each single bend tube to form continuous multi-bend tube. However, by adjusting the combination of bending angles for two bends before and after to compensate the influence of stress interference between two bend elbows on the forming accuracy, and the qualified product with the forming quality meeting the requirements is obtained.

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资助项目（U1737203）

杨睿萌（1995-），女，硕士，助理工程师 E-mail：yangrm00@163.com

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