Plasma welding with a superimposed coaxial fiber laser beam
Plasma welding with a superimposed coaxial fiber laser beam
复制标题
使用叠加同轴光纤激光束进行等离子焊接
DOI：
10.1007/s40194-013-0079-6
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发表时间：
2013
影响因子：
2.1
通讯作者：
U. Füssel
中科院分区：
文献类型：
--
作者：
S. Rose;A. Mahrle;M. Schnick;Thomas Pinder;E. Beyer;U. Füssel
提出了一种电弧与等离子体同轴布置的激光辅助等离子弧焊接新工艺。采用空心阴极作为导引头，对最大功率为300 W的低功率光纤激光（λYb = 1.07 μm）进行了实验研究。这种组合工艺在成本和功率输入方面特别重要。实验表明，由于附加的激光功率，电弧稳定性和焊接效率更高。调查中特别感兴趣的是产生协同效应的原因。因此，通过在空心等离子体阴极内的激光位移来增强实验装置。激光光斑可以引导或尾随电弧，但激光束几乎与电弧保持同轴。不同的光斑位置影响表面上的激光吸收和焊缝的形成。为了最大限度地提高激光器产生的不同温度分布的效果，使用不锈钢AISI 304（X5 CrNi 18 -10）作为基材。研究了不同等离子体喷嘴直径对电弧稳定性和附加激光熔化效率的影响。提出的工作假设是，较高的电弧稳定性和焊接效率是由工件而不是电弧柱中的效应引起的。
A new laser-assisted plasma arc welding process with a coaxial arrangement of arc and plasma was developed. A low-power fiber laser beam (λYb = 1.07 μm) with maximum power of 300 W is guided through a hollow cathode. This combined process is of special interest regarding the costs and power input. Experiments show higher arc stability and welding efficiency due to the additional laser power. Of special interest for the investigations were the reasons for the synergic effects. Therefore, the experimental setup was enhanced by a laser displacement inside the hollow plasma cathode. The laser spot can lead or trail the arc, but the laser beam remains virtually coaxial to the arc. The different spot positions influence laser absorption on the surface and the creation of the weld seam. In order to maximize the effect of different temperature distributions due to the laser, stainless steel AISI 304 (X5CrNi18-10) was used as base material. Different plasma nozzle diameters were investigated on their influence on arc stabilization and melting efficiency by additional laser radiation. Hypothesis of the work presented is that higher arc stability and weld efficiency is caused by effects at the work piece and not in the arc column.