摘要
半球陀螺激光封焊的主要缺陷是匙孔处凝固裂纹。为解决焊缝气密性难题,在运用激光焊接“小孔效应”原理对焊接过程进行理论分析及相关试验验证的基础上,探讨了焊接接头“错边”结构对防止热裂纹的机理,并据此提出了新的焊接结构。研究结果表明,新结构焊缝裂纹受到抑制,气密性得到了显著提高。
The main defect of laser seal welding of hemispherical resonator gyroscope(HRG)is the solidification crack at keyhole.In order to solve the problem of air tightness,on the basis of the theoretical analysis of the welding process and the relevant experimental verification by using the“keyhole effect”of laser welding,the mechanism of“misalignment”structure of welding joint to prevent hot cracks is investigated,and a new welding structure is proposed accordingly.The results show that the crack in the welding joint of new structure is restrained and the air tightness is improved significantly.
作者
李陟
蒋春桥
贺海平
彭凯
陈伟
LI Zhi;JIANG Chunqiao;HE Haiping;PENG Kai;CHEN Wei(The 26th Institute of China Electronics Technology Group Corporation, Chongqing 400060, China)
出处
《压电与声光》
CAS
北大核心
2020年第2期193-196,共4页
Piezoelectrics & Acoustooptics
关键词
凝固裂纹
半球陀螺(HRG)
激光封焊
错位
裂纹机理
气密性
solidification cracking
hemispherical resonator gyroscope(HRG)
laser seal welding
misalignment
crack mechanism
air tightness
