薄板铝合金光纤激光压焊坡口内材料的熔化行为

发布时间：2018-04-05 17:09

本文选题：激光技术　切入点：激光压焊　出处：《中国激光》2017年06期

【摘要】：利用光纤激光扫描焊接铝合金V型坡口,研究了坡口角度、透镜焦距、离焦量等对坡口内材料熔化行为的影响。结果表明,V型坡口对光纤激光具有明显的汇聚作用。当焦距为300mm、离焦量为0~10mm、坡口角度为5°时,坡口内可获得较好的熔化效果。进一步分析表明,这与铝对光纤激光在布儒斯特角处的吸收率不高有关,但由于每次反射会损失部分激光能量,因此光纤激光在V型坡口内的反射次数不宜过多。
[Abstract]:The effects of groove angle, lens focal length and defocus on the melting behavior of aluminum alloy V-shaped groove were studied by using optical fiber laser scanning welding.The results show that V-groove has obvious convergent effect on fiber laser.When the focal length is 300 mm, the defocus is 0 ~ 10 mm and the groove angle is 5 掳, a better melting effect can be obtained in the groove.Further analysis shows that this is related to the low absorption rate of aluminum to fiber laser at Brewster corner, but due to the loss of part of laser energy in each reflection, the reflection times of fiber laser in V-shaped groove should not be excessive.
【作者单位】：北京工业大学激光工程研究院高功率及超快激光先进制造实验室;
【基金】：国家自然科学基金(51475011和51505011)
【分类号】：TG457.14;TN249

【相似文献】