摘要
某飞机用钛合金高锁螺栓在装配过程中发生断裂。通过宏观分析、微观分析、金相检验、力学性能复查和装配现场调查等方法对螺栓的断裂原因进行了分析。结果表明:该钛合金高锁螺栓为单边弯曲应力造成的过载断裂,与螺栓制造质量无关。螺栓装配区域操作空间狭小,安装时扳手的转动平面易发生倾转,从而在螺栓上形成弯曲应力,建议改进装配工具。
The titanium alloy high lock bolts of an aircraft fractured during assembly.The causes of bolts fracture were analyzed by means of macro analysis,micro analysis,metallographic examination,mechanical property recheck and assembly site investigation.The results show that the bolts were an overload fracture caused by single side bending stress,which has nothing to do with the bolts manufacturing quality.The operation space of the bolts assembly area was narrow,and the rotation plane of the wrench was prone to tilt during installation,thus formed bending stress on the bolt.It is suggested to improve the assembly tool.
作者
何军
王浩宇
王大为
丁亚红
李国庆
朱苓
HE Jun;WANG Haoyu;WANG Dawei;DING Yahong;LI Guoqing;ZHU Ling(AVIC Chengdu Aircraft Industrial(Group)Co.,Ltd.,Chengdu 610091,China)
出处
《理化检验（物理分册）》
CAS
2020年第8期66-69,共4页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
关键词
钛合金
高锁螺栓
过载断裂
装配应力
titanium alloy
high lock bolt
overload fracture
assembly stress
