Transactions of Materials and Heat Treatment

Title：Precision forming process and mold technology on high-rib and ultra-thin-walled aluminum alloy forgings

Authors： Li Shishan1 Zhou Jie1 Gan Yuping1 Wang Qiuyun1 Xia Yufeng1 Lu shun2 Wu Daoxiang3

Unit：

KeyWords：

ClassificationCode：TG319

year,vol(issue):pagenumber：2021,46(9):299-307

Abstract：

For T-shaped high-rib and ultra-thin-walled aluminum alloy components, such as aircraft window frame components, due to high requirements on forming quality, metal streamlines and dimensional accuracy, the precision die forging is prone to defects such as insufficient filling, folding and inconsistent streamlines. Therefore, a method of bidirectional shunt forming of metal along the center skin of forgings and the vertical and horizontal directions of rib top was proposed, which used internal flash, margin of rib top and resistance wall structure to achieve a reasonable bidirectional shunt to meet the quality requirements of forgings, and aiming at the difficulty of demolding after forming caused by the small draft angle of forgings, a special combined mold using an inner mold for integral demolding was invented. Furthermore, the shape and sizes of blank, the forming process and the mold were optimized further by combining with numerical simulation and process test, and the shape and sizes of the forgings were checked by the three-dimensional scanning. The results show that using the bidirectional shunt method and the combined mold structure can effectively avoid problems such as folding, insufficient filling, streamline disorder and demolding deformation of forgings, and the qualified production of high-rib and ultra-thin-walled aluminum alloy precision frame part is realized.

Funds：

国家自然科学基金面上项目（51775068）；大型复杂航空模锻件全流程绿色制造工艺创新及应用（2018272106）；重庆市研究生科研创新项目（CYB20004）

李世山（1993-），男，博士研究生 E-mail：liss1115@163.com 通信作者：周杰（1965-），男，博士，教授 E-mail：zhoujie@cqu.edu.cn

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