锻压技术

某型机7B04铝合金接头锻造工艺优化

英文标题：Forging process optimization of 7B04 aluminum alloy joint in a aircraft

分类号：TG316

出版年,卷(期):页码：2021,46(10):38-43

摘要：

为解决某型机7B04铝合金接头锻件强度偏低、锻造工序多的问题，基于DEFORM数值模拟软件，对某型机7B04铝合金接头锻造过程进行研究。结果表明：通过优化模具阻力墙，使金属沿纵向和横向的流动更加均匀，可以保证锻件高筋条部位的充填完整；同时，优化了金属纵向与横向流出的占比，与传统锻造工艺的终锻火次工序相比，沿横向流出金属与沿纵向流出金属比例从4∶1优化至3∶2，实现了一火次锻造成形。采用优化工艺的试制结果与数值模拟结果吻合良好，锻件纵截面与横截面的金属流线均匀，锻件的抗拉强度、屈服强度有明显提升，均满足产品性能指标，并且抗拉强度和屈服强度富裕量均超过20 MPa。

In order to solve the problems of low strength and too many forging processes for 7B04 aluminum alloy joint forgings in a aircraft, the forging process of 7B04 aluminum alloy joint in a aircraft was studied based on DEFORM numerical simulation software. The results show that by optimizing the die resistance wall, the metal flows along the longitudinal and transverse directions are more uniform, and the complete filling in the high rib position of the forgings can be ensured. At the same time, the proportion of metal outflow for longitudinal and transverse directions is optimized. Compared with the final fire forging process of traditional forging process, the proportion of metal outflow for transverse and longitudinal directions is optimized from 4∶1 to 3∶2, and one fire forging is realized. The trial production results of the optimized process are in good agreement with the numerical simulation results, the metal streamlines in the longitudinal and cross sections of the forgings are uniform, the tensile strength and yield strength of the forgings are significantly improved, both meet the product performance indexes, and the margin of tensile strength and yield strength exceeds 20 MPa.

基金项目：

作者简介：王富强（1978-），男，工学博士，高级工程师 E-mail：wangfq@avic.com

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