锻压技术

航空发动机高锥体零件充液成形工艺

英文标题：Hydroforming technology of high cone parts for aero-engine

单位：1. 天津天锻航空科技有限公司 2.空军装备部驻沈阳地区第一军事代表室 3.中国航发常州兰翔机械有限责任公司

分类号：TG301

出版年,卷(期):页码：2020,45(7):72-76

摘要：

针对航空发动机中典型的难成形高锥体零件进行充液成形工艺研究。通过单拉试验获得材料的应力-应变曲线等材料性能参数，基于有限元薄板分析软件进行数值模拟，通过优化工艺参数和坯料尺寸来控制前段弧面起皱且保证拉伸到位。利用预拉伸—热处理工艺—终拉伸来抑制直臂段圆度。最后，根据数值分析结果和现场零件拉伸的现象来反复修正工艺参数，达到一个稳定的拉伸参数。通过试验数据与现有工艺参数相比可知，高锥体零件充液成形与传统刚性拉伸成形相比，材料成形极限提高4%；零件的轮廓度达到0.1 mm，周期缩短了20%，零件合格率达到99%；解决了传统拉伸刚性工艺中存在的起皱和破裂、圆度误差大等问题。

For the typical high cone part which was difficult to form in aero-engine, its hydroforming process was studied. Then, the material performance parameters such as stress-strain curve of material were obtained by the single tensile test, and the hydroforming process of high cone part was simulated by finite element thin plate analysis software. Furthermore, the wrinkling of front arc surface was controlled and the drawing was complete by optimizing process parameters and blank sizes, and the roundness of straight arm segment was controlled by pre-drawing-heat treatment process-final drawing. Finally, according to the results of numerical analysis and the phenomenon of on-site part drawing, the process parameters were repeatedly modified to reach the stable drawing parameters. Compared with the test data and existing process parameters, the forming limit of material is increased by 4% by comparing hydroforming of high cone parts with traditional rigid drawing, the profile of parts reaches 0.1 mm, the period is shortened by 20%, and the qualification rate of parts reaches 99%. Thus, the problems of wrinkling, cracking, large roundness error existing in the traditional rigid drawing process are solved.

基金项目：

天津科技支撑计划项目（18YFCZZC00240）

陈林（1987），男，学士，中级工程师 E-mail：chenlin210@126.com 通讯作者：熊爱奎（1985），男，硕士，中级工程师 E-mail：xiong791912@126.com

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