脉冲激光热传导焊接技术在石英挠性加速度计 组件装配连接上的应用研究

在不改变激光重复频率、焊接速率、脉冲宽度、离焦量等参数的情况下,只改变峰值功率,采用Nd:YAG脉冲激光对石英加速度计表芯装配组件进行热传导焊接,通过X射线显微镜和超声波无损检测系统对焊接样件的焊缝形态与焊接质量进行检测分析,并对样件拉伸强度进行测试.结果表明:脉冲激光热传导焊接中的热输入量对焊缝形态和焊接质量有直接的影响,较低的热输入量可以实现边界轮廓整齐、表面光亮、热影响区较小、残余应力较低的焊缝形态,并且没有裂纹缺陷,同时焊接样件的拉伸强度是环氧胶粘接样件的3倍以上.因此,脉冲激光热传导焊接技术在组件装配连接上的应用具有潜在的优势.

Research on Laser Heat Conduction Welding in Components Assembly of Quartz Flexible Accelerometer

Components of quartz accelerometer core are connected by Nd:YAG pulse laser heat conduction welding with changing the peak power only, the welding shape and welding quality of samples are checked and analyzed through X-ray microscope and ultrasonic nondestructive testing system, and the tensile strength of samples are tested.The results show that the heat input of the pulse laser heat conduction welding has a direct impact on the welding shape and the welding quality, low heat input can get neat boundary, clean surface, small heat affected zone and low residual stress, and moreover, there is no crack defects.The tensile strength of the welded samples is three times more than that of epoxy adhesive samples.Therefore, pulse laser heat conduction welding technology has a potential advantage in the application of components assembly connection