双焦点激光焊接工艺参数对焊缝成形影响

通过利用自行研制的分束焊接头将一束激光分为能量相当的两束激光,在沿焊缝方向上串联产生了两个焦点.通过该试验系统研究了在双焦点激光焊接过程中参数的变化对焊缝成形和熔深的影响规律,探索了双焦点激光焊接最佳工艺的参数调节,试验结果表明,双焦点激光焊接显著改善了焊接质量,焊缝的中心线开裂敏感性也降低.双焦点激光焊接过程中,激光功率、焊接速度、离焦量等参数的变化,均能对焊缝成形和熔深产生显著影响,进而影响焊缝的微观组织和宏观形状.

Effect of Welding Parameters on Formation of Double-focus Welds

A self designed welding head is described.The welding head can divide one torch into two equally and the two focuses are in series along the weld.A series of experiment has done by this head to analyze the effect of welding parameters on the formation and penetration of welds in double focuses laser welding.The experiment results indicate that the weld quality is improved prominently and crack sensitivity is reduced.There are many factors having effect on the formation and penetration of welds of double focuses laser welding,and also having influence on the microstructures and macro forms of welds.In all the parameters,the laser beam power and the wielding speed are the most primary factors.