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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 >Welding of Die-Casted Magnesium Alloys on Production Machines
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Welding of Die-Casted Magnesium Alloys on Production Machines

机译：在生产机器上焊接压铸镁合金

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摘要

The importance of light weight magnesium alloys especially for the automotive industry is growing significantly, due to rising environmental requirements. Especially going along with ever more demanding safety standards which require the installation of heavy safety appliances, the use of light weight materials becomes more and more important. Magnesium is an extremely suitable material for die-casting. One goal of die-casting to reduce production costs is to avoid following process steps. Nevertheless joining processes have to be developed to fully benefit from the whole designing potential of this material. Laser beam welding turns out to be very suitable to join magnesium parts. Results welding the magnesium alloys AZ91HP and AM50HP with a 3 kW Nd:YAG-laser and a 6 kW CO_2-laser with an industrial robot and a gantry robot system are shown from a production point of view. Especially the determination of the process window by analyzing the influence of laser type, power, welding velocity and shielding gas as well as the influence of the base material leads to conclusions about process stability and production tolerances. Further investigations concerning fixturing techniques as well as seam preparation and joint geometry show effects on the process flexibility and the effort to realize high quality seams under production conditions. The investigated process parameters are evaluated mainly in respect to their influence on the static strength of the welding seam.
机译：由于对环境的要求不断提高，轻质镁合金的重要性特别是对汽车行业的重要性正在显着提高。尤其是随着越来越严格的安全标准要求安装重型安全设备，使用轻质材料变得越来越重要。镁是非常适合压铸的材料。压铸以降低生产成本的一个目标是避免遵循以下工艺步骤。然而，必须开发连接工艺以充分利用这种材料的全部设计潜力。事实证明，激光束焊接非常适合连接镁零件。从生产的角度显示了用3 kW Nd：YAG激光和6 kW CO_2激光与工业机器人和龙门机器人系统焊接镁合金AZ91HP和AM50HP的结果。特别是通过分析激光类型，功率，焊接速度和保护气体以及基材的影响来确定工艺窗口，从而得出有关工艺稳定性和生产公差的结论。有关固定技术以及接缝准备和接缝几何形状的进一步研究表明，对工艺灵活性以及在生产条件下实现高质量接缝的努力产生了影响。评估所研究的工艺参数主要是考虑其对焊缝静态强度的影响。

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