面向Ti-6Al-4V合金的开缝芯棒孔挤压强化次数研究  

Research on Hole Expansion Strengthening Times of Split Mandrel for Ti-6Al-4V Alloy

作　　者：刘飞 苏宏华[1] 徐九华[1] 梁勇楠 葛恩德 凡志磊 Liu Fei;Su Honghua;Xu Jiuhua;Liang Yongnan;Ge Ende;Fan Zhilei(College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;COMAC Shanghai Aircraft Manufacturing Co.,Ltd.,Shanghai 200436,China)

机构地区：[1]南京航空航天大学机电学院,江苏南京210016 [2]中国商飞上海飞机制造有限公司,上海200436

出　　处：《钛工业进展》2023年第3期14-18,共5页Titanium Industry Progress

基　　金：国家自然科学基金创新研究群体科学基金项目(51921003);国家商用飞机制造工程技术研究中心创新基金项目(COMAC-SFGS-607);江苏省科研与实践创新计划项目(KYCX21_0196)。

摘　　要：为了探究挤压强化次数对开缝芯棒性能的影响,实现孔挤压强化工具的可重复使用,分析了开缝芯棒孔挤压强化工艺,开展了开缝芯棒20次孔挤压强化Ti-6Al-4V合金试验,研究了挤压强化次数对开缝芯棒孔挤压强化效果的影响。结果表明,开缝芯棒20次孔挤压强化过程中,挤压力、工作环直径和孔结构孔径波动平缓,未发生显著变化;开缝芯棒的挤压部位存在划痕,工作环直径与孔结构孔径的变化在加工误差范围内;开缝芯棒的划痕对Ti-6Al-4V合金孔结构挤压强化效果影响不大,开缝芯棒孔挤压强化能够实现孔挤压强化工具的重复使用。In order to investigate the effect of expansion strengthening times on the performance of split mandrel and achieve the reusability of hole expansion strengthening tools,the hole expansion strengthening process of split mandrel was analyzed.Twenty times hole expansion strengthening experiments of split mandrel were conducted on Ti-6Al-4V alloy,and the effect of expansion strengthening times on the hole expansion strengthening effect of split mandrel was studied.The results indicate that the fluctuation of expansion pressure,working ring diameter,and hole structure aperture during twenty times hole expansion strengthening of the split mandrel are gentle,without significant changes.There are scratches on the expansion part of the split mandrel,and the changes in the diameter of the working ring and the hole structure aperture are within the machining error range.The scratches on the split mandrel have little effect on the Ti-6Al-4V alloy hole structure expansion strengthening effect,and the hole expansion strengthening of the split mandrel can achieve the reuse of the hole expansion strengthening tool.

关 键 词：TI-6AL-4V合金 孔挤压强化 开缝芯棒 使用寿命 

分 类 号：TG146.23[一般工业技术—材料科学与工程]