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首页> 外文会议>Conference on Laser Materials Processing Vol.85f: Welding and Modeling, Nov 16-19, 1998, Orlando, FL USA >Laser Welding of Aluminum Car Bodies - From Research to Production
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Laser Welding of Aluminum Car Bodies - From Research to Production

机译：铝车身的激光焊接-从研究到生产

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摘要

Aluminum as a light weight material has become more and more important for car body construction in the past few years. The laser which has been very successfully applied to steel for many years can also be used for welding of aluminum. Nevertheless, the laser is rarely found as a tool for joining aluminum in series production, up to now. Among others this is due to the fact that the existing literature does not provide any hints concerning essential issues for series production by laser with respect to weldable tolerance zones and permissible limits, e.g. the maximum bridging of gaps or the welding out of position. The paper presents exemplary solutions to the problems mentioned above, resulting from the application of a 3 kW fiber-guided Nd:YAG-Laser. Taking the example of an aluminum car body, the possible combinations of aluminum alloys and joining geometries are shown. The tolerance zones referring to mismatch of the beam are pointed out for overlap and butt joint geometries - using a six thousand series alloy which is sensitive against hot cracks. Furthermore, it is demonstrated which size gaps can be bridged with filler wire and in which constrained positions a secure and stable process is possible. The experimental setup, especially the processing head which facilitates these experiments is presented.
机译：在过去的几年中，铝作为轻质材料在车身制造中已变得越来越重要。多年来非常成功地应用于钢的激光也可以用于铝的焊接。然而，到目前为止，很少有人将激光用作连接铝的批量生产的工具。除其他外，这是由于这样的事实，即现有文献没有提供关于可焊接的公差带和允许的极限例如通过激光进行批量生产的基本问题的任何暗示。间隙的最大桥接或焊接位置不正确。本文提出了解决上述问题的示例性解决方案，这些解决方案是由3 kW光纤引导的Nd：YAG-Laser产生的。以铝车身为例，显示了铝合金和连接几何形状的可能组合。使用了对热裂纹敏感的六千系列合金，指出了光束不匹配的公差带，用于重叠和对接几何形状。此外，证明了可以用填充金属丝弥合哪些尺寸间隙，并且在哪些受限位置中可以进行安全而稳定的处理。介绍了实验装置，特别是有助于这些实验的处理头。

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