超声振动-电脉冲耦合铝合金薄壁管缩口增厚成形  

Necking and thickening forming on ultrasonic vibration-electric pulse coupling for aluminum alloy thin-walled tube

作　　者：范玉斌 徐雪峰[1] 陶锐辰 罗明[2] 危立明 李晓冬 肖洁[1] 曾祥 Fan Yubin;Xu Xuefeng;Tao Ruichen;Luo Ming;Wei Liming;Li Xiaodong;Xiao Jie;Zeng Xiang(School of Aviation Manufacturing Engineering,Nanchang Hangkong University,Nanchang 330063,China;Key Laboratory of High Performance Manufacturing for Aero Engine(Ministry of Industry and Information Technology),Northwestern Polytechnical University,Xi′an 710072,China)

机构地区：[1]南昌航空大学航空制造工程学院,江西南昌330063 [2]西北工业大学航空发动机高性能制造工信部重点实验室,陕西西安710072

出　　处：《锻压技术》2024年第8期53-58,共6页Forging & Stamping Technology

基　　金：国家科技重大专项(J2019-Ⅶ-0014-0154);江西省自然科学基金资助项目(20224BAB214050);航空发动机高性能制造工信部重点实验室开放课题资助项目(HPM-2020-01)。

摘　　要：在航空器中,使用缩口增厚管螺纹的连接方式,可以改善传统缩口拉杆铆接带来的增重问题。管件增厚率是缩口增厚成形的重要指标。为进一步增加缩口增厚管的厚度,提出了超声振动-电脉冲耦合缩口增厚成形方法,首先进行了5A02铝合金薄壁管电脉冲耦合缩口增厚成形实验,发现提高电流强度有利于提升管材温度、减小成形抗力、改善管件的屈曲缺陷,以及增加管件厚度;进一步地,开展了超声振动-电脉冲耦合作用下5A02铝合金薄壁管缩口增厚成形实验,结果显示,施加超声振动的管件更早进入增厚成形阶段,成形后增厚区的平均增厚率、增厚区与缩口区的平均增厚率之差更大,说明超声振动与电脉冲耦合工艺利于增厚成形。In aircraft,the connection type of necked and thickened tube threads can improve the weight gain problem caused by traditional necked tie rod riveting,and the thickening rate of tube is a vital index of necking and thickening forming.Therefore,in order to increase the thickness of the necked and thickened tube,the necking and thickening forming method of ultrasonic vibration-electric pulse coupling was proposed.Firstly,the necking and thickening forming experiments with electric pulse coupling for 5A02 aluminum alloy thin-walled tubes were carried out.And it is found that increasing the current intensity is beneficial to increase the tube temperature,reduce the deformation resistance,avoid the buckling defect of tube as well as increase the tube thickness.Then,the necking and thickening forming experiments with ultrasonic vibration-electric pulse coupling for 5A02 aluminum alloy thin-walled tubes were carried out.The results show that the formed tubes with ultrasonic vibration begin to thicken earlier,and the average thickening rate of the thickened area and the difference of average thickening rate between the thickened and necked areas is greater after forming,which illustrates that the ultrasonic vibration-electric pulse coupling process is beneficial for thickening forming.

关 键 词：超声振动 电脉冲 薄壁管 缩口增厚成形 增厚率 

分 类 号：TG306[金属学及工艺—金属压力加工]