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首页> 外文会议>Conference on High-Power Laser Materials Processing: Applications, Diagnostics, and Systems VI >Modelling and control for laser based welding processes Modern methods of process control to improve quality of laser-based joining methods
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Modelling and control for laser based welding processes Modern methods of process control to improve quality of laser-based joining methods

机译：基于激光的焊接工艺建模与控制方法控制的现代方法，提高基于激光的加入方法的质量

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摘要

To ensure the competitiveness of manufacturing companies it is indispensable to optimize their manufacturing processes. Slight variations of process parameters and machine settings have only marginally effects on the product quality. Therefore, the largest possible editing window is required. Such parameters are, for example, the movement of the laser beam across the component for the laser keyhole welding. That's why it is necessary to keep the formation of welding seams within specified limits. Therefore, the quality of laser welding processes is ensured, by using post-process methods, like ultrasonic inspection, or special in-process methods. These in-process systems only achieve a simple evaluation which shows whether the weld seam is acceptable or not. Furthermore, in-process systems use no feedback for changing the control variables such as speed of the laser or adjustment of laser power. In this paper the research group presents current results of the research field of Online Monitoring, Online Controlling and Model predictive controlling in laser welding processes to increase the product quality. To record the characteristics of the welding process, tested online methods are used during the process. Based on the measurement data, a state space model is ascertained, which includes all the control variables of the system. Depending on simulation tools the model predictive controller (MPC) is designed for the model and integrated into an NI-Real-Time-System.
机译：为确保制造公司的竞争力，优化其制造过程是必不可少的。工艺参数和机器设置的轻微变化仅对产品质量产生了略微影响。因此，需要最大可能的编辑窗口。这些参数例如是激光束穿过用于激光钥匙孔焊接的部件的运动。这就是为什么有必要在规定的限度内保持焊缝的形成。因此，通过使用后工艺方法，如超声检查或特殊的工艺方法，确保了激光焊接过程的质量。这些过程中的系统仅实现了简单的评估，其示出了焊缝是否可接受。此外，在处理系统中使用没有反馈来改变控制变量，例如激光的速度或激光功率的调整。在本文中，研究组提出了在线监测研究领域的当前结果，激光焊接过程中的在线监测，在线控制和模型预测控制，以提高产品质量。为了记录焊接过程的特性，在过程中使用了测试的在线方法。基于测量数据，确定状态空间模型，包括系统的所有控制变量。根据仿真工具，模型预测控制器（MPC）是为模型设计的，并集成到NI实时系统中。

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