锻压技术

椭球瓜瓣构件充液成形模具设计及优化

英文标题：Design and optimization on hydroforming die for ellipsoidal melon petal component

分类号：TG394

出版年,卷(期):页码：2021,46(6):167-173

摘要：

以两种材质（2219铝合金及2A14铝合金）、8种厚度规格（4.5~9.5 mm）的航天运载火箭用铝合金椭球瓜瓣构件产品为研究对象，以板坯减薄率、壁厚同板差及型面偏差为技术指标，通过理论计算、软件辅助等手段设计完成了一套通用的充液成形模具，并利用有限元软件对全部规格的椭球瓜瓣构件进行充液成形工艺仿真，得到了板坯成形后的技术指标参数。通过对模具进行仿真回弹补偿优化，并结合后期生产试验进行验证和改进，成功优化了一套可实现两种材质、8种规格的椭球瓜瓣构件制造的充液成形模具，板坯成形后，减薄率≥3%、壁厚同板差≤0.3 mm、型面偏差≤2 mm，试验板坯的尺寸及性能结果全部满足技术条件要求，极大地节约了模具投入成本，并提高了生产效率。

For aluminum alloy ellipsoidal melon petal components used in space launch vehicle with two kinds of materials (2219 and 2A14 aluminum alloys) and eight thickness specifications (4.5-9.5 mm), taking thinning rate of slab, wall thickness difference and profile deviation as the technical indexes, a set of general hydroformuing die was designed by theoretical calculation and software aid, and the hydroforming process simulation for all specifications of the ellipsoidal melon petal components was conducted by FE software to obtain the technical parameters after the slab was formed. Then, a set of hydroforming die manufacturing two materials and eight specifications of ellipsoidal melon petal components was optimized successfully by the springback compensation optimization simulation combined with the production tests and improvements. And the dimensions and performance indicators of the test slabs all meet the technical requirements with the thinning rate ≥3%, the wall thickness difference≤0.3 mm and the profile deviation ≤2 mm, which greatly save the die cost and improve the production efficiency.

基金项目：

天津市科技计划项目(17YFZCGX00530)

毕海娟（1983-），女，硕士，工程师 E-mail：bhj916@163.com

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