锻压技术

一种硬化不锈钢零件二次充液成形工艺

英文标题：Secondary hydroforming process of a hardened stainless steel part

作者：熊爱奎1 孔祥玮2 桑悦诚1 姬晓东1 陈树来1 王庆元1 李进1 祁朋飞1

分类号：TG394

出版年,卷(期):页码：2025,50(8):90-96

摘要：

通过对硬化不锈钢零件的材料性能进行分析，确定材料硬化对零件二次充液成形的影响。对二次充液成形工艺方案进行仿真模拟，探究其对零件产生的影响。通过增加硬化不锈钢零件预成形设计和增加减力柱来改善工序间的载荷传递，建立以硬化不锈钢零件二次充液成形所需最大合模力、最大减薄率和最大回弹量为优化目标，以液室压力、间隔时间和减力柱直径为设计变量的响应面模型，应用响应面方法对硬化不锈钢零件二次充液成形工艺参数进行优化。确定最佳参数组合为：液室压力为13.58 MPa、间隔时间为4 h、减力柱直径为Φ1313 mm。验证结果表明：24 h内材料硬化使得零件的抗拉强度增加约4%，采用减力柱方式使合模吨位减少51%，二次充液成形使得零件的最大回弹量增加28%。

The influence of material hardening on the secondary hydroforming of stainless steel parts was determined by analyzing the material properties of hardened stainless steel parts, and the secondary hydroforming process scheme was simulated to investigate its impact on the parts. Then, the load transfer between processes was improved by adding the pre-forming design and load-reducing columns of hardened stainless steel parts, and the response surface model was established by taking the maximum clamping force, the maximum thinning rate and the maximum springback required for the secondary hydroforming of hardened stainless steel parts as the optimization objectives, and taking the liquid chamber pressure, the interval time and the diameter of load-reducing columns as the design variables. Furthermore, by the response surface method, the process parameters of the secondary hydroforming of hardened stainless steel parts were optimized as the liquid chamber pressure of 13.58 MPa, the interval time of 4 h, and the load-reducing columns diameter of Φ1313 mm. The verification results show that the tensile strength of parts is increased by 4% due to material hardening within 24 h, the die-closing tonnage is reduced by 51% due to the use of load-reducing columns, and the maximum springback amount of parts is increased by 28% due to the secondary hydroforming.

基金项目：

作者简介：熊爱奎（1984-），男，硕士，高级工程师 E-mail：xiongaikui@gt.cn 通信作者：姬晓东（1992-），男，学士，工程师 E-mail：xiong791912@126.com

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