Role of strong focusability on the welding process
Role of strong focusability on the welding process
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DOI：
10.2351/1.2795748
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发表时间：
2007-11
影响因子：
2.1
通讯作者：
J. Weberpals;F. Dausinger;G. Göbel;B. Brenner
中科院分区：
文献类型：
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作者：
J. Weberpals;F. Dausinger;G. Göbel;B. Brenner
薄板激光器和光纤激光器具有聚焦性强、效率高的特点。随着这种激光源在高功率区域的可用性，具有非常小的焦点直径低至50 μm的锁孔焊接成为可能。这种激光源的典型焦点直径制度，现在可以比较他们对焊接深度和工艺效率的影响。根据薄板激光实验的结果，在早期的出版物中已经表明，发散角对可实现的焊接深度的影响在光斑直径较小的情况下急剧增加。这种效应与更高光斑直径的行为相反，但现在通过光纤激光器的附加实验证实了这一点，该实验可以获得更小的发散值。另一方面，两种激光系统的可达截面积均未受焦点直径和发散角的影响。这意味着在所研究的参数范围内，工艺效率…
Thin disk lasers as well as fiber lasers are distinguished by their strong focusability and high efficiency. With the availability of such laser sources in a high power region, keyhole welding with very small focus diameters down to 50 μm became possible. Typical focus diameter regimes of such laser sources can now be compared with regard to their effect on welding depth and process efficiency. Based on results of thin disk laser experiments it has been shown in earlier publications that the influence of the divergence angle on the achievable welding depth increases dramatically for lower spot diameters. This effect stands in contrast to the behavior at higher spot diameters, but was now confirmed by additional experiments with a fiber laser which made available smaller divergence values. No influence of focus diameter and divergence angle on the reachable cross sectional area for both laser systems has been observed, on the other hand. That means that in the investigated parameter range the process effic...