Transactions of Materials and Heat Treatment

Title：Design and optimization on hydroforming die for ellipsoidal melon petal component

Authors：

Unit：

KeyWords： hydroforming springback compensation ellipsoidal melon petal wall thickness difference profile deviation

ClassificationCode：TG394

year,vol(issue):pagenumber：2021,46(6):167-173

Abstract：

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.

Funds：

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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