Laser deep penetration weld seams with high surface quality
Laser deep penetration weld seams with high surface quality
复制标题
激光深熔焊缝具有高表面质量
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
F. Vollertsen
中科院分区：
文献类型：
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作者：
V. Schultz;W. Cho;F. Vollertsen
在以往的文献中，作者们表明，横向光束振荡和送丝的激光深熔焊接提高了对接接头结构的间隙桥接能力。在这些实验中，发现了以下现象。在特定的振荡频率下，在激光光斑的正后方形成了一个圆形空腔，即所谓的纽扣孔。它的直径与熔池宽度几乎一致。纽扣孔的存在似乎与接缝的高表面质量有关。在本研究中，进行了1.5 mm厚铝板(EN AW-6082)的焊丝输送对接结构的焊接试验。结果表明，存在一个具有稳定扣眼的工艺窗口。实践证明，纽扣孔焊接工艺可靠，焊缝表面光滑，几乎无波纹。
In former publications, the authors showed that laser deep penetration welding with transversely beam oscillation and wire feeding increases the gap bridging ability for butt-joint configurations. Within these experiments the following phenomena was found. A circular cavity, the so-called buttonhole, was formed directly behind the laser spot at certain oscillation frequencies. Its diameter corresponds nearly to the melt pool width. The existence of the buttonhole seemed to correlate with high surface quality of the seam. In this study, welding experiments with 1.5 mm thick aluminum sheets (EN AW-6082) in butt-joint configuration with filler wire delivery have been carried out. The results show that a process window with a stable buttonhole exists. It is proven that buttonhole welding allows reliable welding processes with very smooth almost ripple-free seam surface.