同轴型激光器焊接稳定性分析

Stability Analysis of Coaxial Laser Welding

分析了激光焊接的基本原理及其在同轴光器件制造中的应用与优点,通过实验分析焊接参数与焊点状态的对应关系。结果表明,随着脉冲宽度、激光峰值能量的增大焊点的直径与熔深变大,深宽比变大;随着离焦量的增大,焊点直径先增大后变小,且熔深变小,深宽比变小。比较了不同耦合参数对激光焊接前后光功率变化量及温循变化量的影响。结果表明,焊一点后松夹有助于产品应力的释放,不同焊点分布下的焊变量平均值无明显差异,焊前上抬量会显著影响平均焊变量,平均焊变量随着上抬的增大而减小,而过小或过大的耦合缝隙会导致焊变量分布离散。

The study analyzes the basic principle of laser welding and its application and advantages in coaxial optical device manufacturing,and the corresponding relationship between welding parameters and solder joint state by experiment.The results show that with the increase of pulse width and laser peak energy,the diameter and penetration depth of solder joints increase,and the depth-width ratio increases.With the increase of defocus,the diameter of solder joint first increases and then decreases,the penetration depth decreases,and the depth-width ratio decreases.The results show that loosening the clamp after welding point can help to release the stress of the product.There is no significant difference in the average value of welding variables under different distribution of welding points.The amount of upward lift before welding will significantly affect the average welding variable.The average welding variable will decrease with the increase of upward lift,while too small or too large coupling gap will cause the distribution of welding variables to be discrete.